Cassini Radio and Plasma Wave Science

RPWS Standard Products

Archive Volume

Software Interface Specification

(RPWS Archive Volume SIS)

IO-AR-019

Version 1.0

March 2004

W. S. Kurth

Department of Physics & Astronomy

The University of Iowa

Iowa City, IA 52242

Cassini Radio and Plasma Wave Science

RPWS Standard Products

Archive Volume

Software Interface Specification

(RPWS Archive Volume SIS)

IO-AR-19

Version 1.0

March

2004

Prepared by:

_______________________________________ ______________

William S. Kurth Date

Cassini RPWS Deputy Principal Investigator

Approved:

_______________________________________ ______________

Donald A. Gurnett Date

Cassini RPWS Principal Investigator

_______________________________________ ______________

Diane Conner Date

Cassini Archive Data Engineer

_______________________________________ ______________

Raymond Walker Date

PDS-PPI Node Manager

_______________________________________ ______________

Steve Adams Date

PDS Central Node Data Engineer

Table of Contents

1. Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.1. Content Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.2. Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.3. Applicable Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.4. Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3. Archive Volume Generation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1. Data Transfer and Validation Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.2. Data Product Sizes and Delivery Dates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.3. Media Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.4. Backup and Duplicates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.5. Labeling and Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4. Archive Volume Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.1. Root Directory Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.2. INDEX Directory Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.3. DOCUMENT Directory Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.4. CATALOG Directory Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.5. BROWSE Directory Contents and Naming Conventions. . . . . . . . . . . . . . . . . . . . . . 9

4.5.1. Required Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.5.2. BROWSE/RPWS_KEY_PARAMETERS Directory Contenst. . . . . . . . . 10

4.5.3. BROWSE/RPWS_LOW_RATE_FULL Directory Contents. . . . . . . . . . 10

4.5.4. BROWSE/RPWS_WIDEBAND_FULL Directory Contents. . . . . . . . . . 10

4.5.5. BROWSE/RPWS_WAVEFORM_FULL Directory Contents. . . . . . . . . . 10

4.6. DATA Directory Contents and Naming Conventions . . . . . . . . . . . . . . . . . . . . . . 11

4.6.1. Required Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.6.2. DATA/RPWS_RAW_COMPLETE Directory Contents. . . . . . . . . . . . . . 11

4.6.3. DATA/RPWS_KEY_PARAMETERS Directory Contents. . . . . . . . . . . 11

4.6.4. DATA/RPWS_LOW_RATE_FULL Directory Contents. . . . . . . . . . . . . 12

4.6.5. DATA/RPWS_WIDEBAND_FULL Directory Contents. . . . . . . . . . . . . 12

4.6.6. DATA/RPWS_WAVEFORM_FULL Directory Contents. . . . . . . . . . . . 13

4.6.7. DATA/ANCILLARY Directory Contents. . . . . . . . . . . . . . . . . . . . . . . . 14

4.7. EXTRAS Directory Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5. Archive Volume Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1. Disk Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2. File Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.1. Document File Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.2. Tabular File Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.3. PDS Label Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.4. Catalog File Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.5. Index File Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.6. Science Data File Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.6.1. RPWS_KEY_PARAMETERS_BROWSE Data Product

Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.6.2. RPWS_KEY_PARAMETERS Data Product Format. . . . . . . . 17

5.2.6.3. RPWS_RAW_COMPLETE Data Product Format. . . . . . . . . . . 17

5.2.6.4. RPWS_LOW_RATE_BROWSE Data Product Format . . . . . . 17

5.2.6.5. RPWS_LOW_RATE_FULL Data Product Format. . . . . . . . . . 17

5.2.6.6. RPWS_WIDEBAND_BROWSE Data Product Format. . . . . . 18

5.2.6.7. RPWS_WIDEBAND_FULL Data Product Format. . . . . . . . . . 18

5.2.6.8. RPWS_WAVEFORM_BROWSE Data Product Format. . . . . 18

5.2.6.9. RPWS_WAVEFORM_FULL Data Product Format. . . . . . . . . 18

6. Support Staff and Cognizant Persons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Appendix A. Directory Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Appendix B. Sample Labels for RPWS_KEY_PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . 22

Appendix C. Sample Labels for RPWS_RAW_COMPLETE. . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Appendix D. Sample Labels for RPWS_LOW_RATE_FULL. . . . . . . . . . . . . . . . . . . . . . . . . . 39

Appendix E. Sample Labels for RPWS_WIDEBAND_FULL. . . . . . . . . . . . . . . . . . . . . . . . . . 51

Appendix F. Sample Labels for RPWS_WAVEFORM_FULL. . . . . . . . . . . . . . . . . . . . . . . . . . 67

Appendix G. Sample Index Labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Appendix H. Sample Ancillary Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Appendix I. Acronym list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

1. Preface

This document describes the format and content of the CAS RPWS Standard Products Archive Collection on DVD-R media.

2. Introduction

2.1 Content Overview

The Cassini Radio and Plasma Wave Science (RPWS) instrument is a collection of sensors and receivers on the Cassini Orbiter that acquire plasma wave, radio wave, thermal plasma, and dust data that address several of the primary Cassini objectives for studies of the Saturnian system and certain targets of opportunity during the cruise to Saturn (including Venus, Earth, Jupiter, and the solar wind). This software interface specification (SIS) covers only the required archive data products including CODMAC Level 2 and/or 3 (NASA Level 1A and/or 1B) data sets. The RPWS team anticipates archiving some higher level products as resources permit; these will be specified in a separate SIS or a future revision to this one.

Table 1. Data Products included in this document:

Standard Data Product ID	Data Set ID
RPWS_KEY_PARAMETERS_BROWSE RPWS_KEY_PARAMETERS	CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0
RPWS_RAW_COMPLETE	CO-V/E/J/S/SS-RPWS-2-REFDR-ALL-V1.0
RPWS_LOW_RATE_BROWSE RPWS_RPWS_LOW_RATE_FULL	CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0
RPWS_WIDEBAND_BROWSE RPWS_WIDEBAND_FULL	CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0
RPWS_WAVEFORM_BROWSE RPWS_WAVEFORM_FULL	CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0

The following provide brief summaries of the data sets listed in Table 1:

Key Parameters Browse (RPWS_KEY_PARAMETERS_BROWSE) consists of Portable Network Graphics (PNG) frequency-time spectrogram images of the Key Parameters data set and serves as a guide to the spectral information in the Key Parameters data set.

Raw Complete (RPWS_RAW_COMPLETE) consists of decompressed and edited telemetry packets including all telemetry data from the RPWS. These data are included in the archive to preserve the original telemetry data, but are not expected to be used for any but exceptional circumstances. We expect the Low Rate Browse and other Standard data products to include all of the RPWS data in a much more accessible form. As such, the Raw Complete data set will be accompanied only by minimal PDS labels and with documentation, included, which provides information on how to read and use this data set. The Low Rate Browse data serves as a guide to the data included in this data set.

Low Rate Browse (RPWS_LOW_RATE_BROWSE) consists of Portable Network Graphics (PNG) frequency-time spectrogram images of the Low Rate Full Resolution Calibrated data set.

Low Rate Full Resolution Calibrated (RPWS_LOW_RATE_FULL) is a data set including all spectral density measurements acquired by the RPWS in units of electric or magnetic field spectral density.

Waveform Browse (RPWS_WAVEFORM_BROWSE) data are of Portable Network Graphics (PNG) frequency-time spectrogram images of the 5-Channel Waveform Receiver observations acquired by the RPWS.

More information on these data sets can be found in the sample data set information templates in Appendices B - E.

This software interface specification describes the format, content, and generation of the Cassini RPWS Standard Product Archive Volumes. Section 3, Archive Volume Generation, describes the procedure for transferring data products to the archive media. Section 4, Archive Volume Contents, describes the structure of the archive volumes and the contents of each file. Section 5, Archive Volume Format, describes the file formats used on the archive volumes. Finally, Section 6, Support Staff and Cognizant Persons, lists the individuals responsible for generating the archive volumes.

2.2 Scope

The specifications in this document apply to all Cassini RPWS standard product archive volumes that are produced on DVD-R media for the Cassini cruise and tour.

2.3 Applicable Documents

1. Cassini Program Data Management Plan, April 1999, JPL D-12560, Rev B.

2. Cassini/Huygens Program Archive Plan for Science Data, August 3, 2000, JPL D-15976, Version 1.

3. D. A., Gurnett, W. S. Kurth, D. L. Kirchner, G. B. Hospodarsky, T. F. Averkamp, P. Zarka, A. Lecacheux, R. Manning, A. Roux, P. Canu, N. Cornilleau-Wehrlin, P. Galopeau, A. Meyer, R. Bostrom, G. Gustafsson, J.-E. Wahlund, L. Aahlen, H. O. Rucker, H. P. Ladreiter, W. Macher, L. J. C. Woolliscroft, H. Alleyne, M. L. Kaiser, M. D. Desch, W. M. Farrell, C. C. Harvey, P. Louarn, P. J. Kellogg, K. Goetz, and A. Pedersen, The Cassini Radio and Plasma Wave Science Investigation, Space Sci. Rev., in press, 2003.

4. Planetary Science Data Dictionary Document, August 28, 2002, Planetary Data System, JPL D-7116, Rev. E.

5. Planetary Data System Data Preparation Workbook, February, 1995, Version 3.1, JPL D-7669, Part 1.

6. Planetary Data System Standards Reference, October 15, 2002, Version 3.5. JPL D07669, Part 2.

2.4 Audience

This specification is useful to those who wish to understand the format and content of the Cassini RPWS Standard Product Archive Collection. Typically, these individuals would be software engineers, data analysts, or planetary scientists.

3. Archive Volume Generation

3.1 Data Transfer and Validation Methods

The Cassini RPWS Standard Product Archive Collection is produced by the Cassini RPWS investigation team centered at The University of Iowa with other sites including Goddard Space Flight Center; the University of Minnesota; the Observatoire de Paris in Meudon, France; CETP in Velizy, France; University of Sheffield, Sheffield, UK; Swedish Institute of Space Physics, Uppsala, Sweden; the Academy of Sciences in Sweden; and University of Oslo, Oslo, Norway. The archiving activity is carried out in cooperation with the PDS Planetary Plasma Interactions (PPI) Node at the University of California, Los Angeles and the Outer Planets subnode of the PPI at The University of Iowa. The Cassini archiving is funded by the Cassini project through a contract between The University of Iowa and the Jet Propulsion Laboratory. The PPI activities are funded by the Planetary Data System.

The Archive Collection will include data acquired during the Cassini cruise to Saturn, including the two Venus flybys, the Earth and Jupiter flybys, and interplanetary cruise as well as data acquired during the prime mission in Saturn orbit. The archive validation procedure described in this section applies to volumes generated during all phases of the mission. At least the first two or possibly three data volumes will be validated in detail via the PDS peer review procedure, but it is anticipated that once any issues raised by that peer review are resolved, subsequent volumes will be validated as to format and content by the PPI node and for scientific integrity and completeness through the use of the data by the RPWS science team and others.

A single archive volume set of Cassini RPWS data is produced for the entire Cassini mission. When sufficient data for a new archive volume are ready for validation, the RPWS team will deliver a DVD-R volume with the data to the PPI Node of the PDS. The volume will include PDS documentation (label) files and ancillary products (index tables, HTML access files, etc.). Each volume of standard products, documentation, and ancillary products is stored on a recordable digital versatile disk (DVD-R) generated by the RPWS team. All data formats are based on the Planetary Data System standards as documented in the PDS Standards Reference [section 2.3-6, Applicable Documents].

The RPWS Team will produce three copies of each DVD-R. One will be sent to the PPI node at UCLA, one to the PDS Central Node at JPL, and the third copy will be kept at The University of Iowa. These three copies are used for validation at The University of Iowa, PPI, and the Central Node. Upon successful validation of a volume, the data are considered released to the PDS. The PDS-PPI is then responsible for duplicating the approved volume as PDS requires for both distribution and the deep archive at NSSDC.

Distribution of the RPWS standard product archive volumes is the responsibility of the PDS. The PPI maintains a mailing list of scientists interested in receiving these data. Users can add or remove themselves from the Cassini RPWS distribution list through a web page maintained at the PPI. The NSSDC may choose to order (and pay for) additional copies at the time PDS generates them or orders copies from a vendor. The NSSDC and the PDS are each separately responsible for making additional future copies to meet the needs of their user communities.

In the event that a volume is found to contain errors, the reviewers can recommend one of two courses of action: fix the disk or publish as is with a note in the ERRATA.TXT file. If the errors are minor, typically minor errors in the documentation, the volume can be published if the appropriate notes are added to the volume’s errata file and the error(s) are corrected on subsequent volumes. If the errors are major, typically involving errors in the data themselves, then the volume must be corrected, re-generated, and sent back out for review.

3.2. Data Product Sizes and Delivery Dates

Table 2 summarizes sizes and delivery rates for the Cassini RPWS Standard Products.

It should be noted that the Cassini/Huygens Program Archive Plan for Science Data specifies the schedule for archive product delivery. Essentially, all cruise and approach products up until SOI are due on 1 July 2005 and subsequent tour data will be delivered in three-month increments every quarter.

Table 2: RPWS Standard Product Sizes and Delivery Rates

Standard Data Product ID	Product Size (cruise/tour)	Production Rate (cruise/tour)	Time to Fill one 4.5 Gbyte Volume (cruise/tour)	Volumes for Mission (cruise/tour)
RPWS_KEY_PARAMETERS_BROWSE	150 kB/150 kB	1/day / 1/day
RPWS_KEY_PARAMETERS	150 kB/150 kB	1/day / 1/day
RPWS_RAW_COMPLETE	var (20 MB)	1/hr / 1/hr
RPWS_LOW_RATE_BROWSE	150 kB/150 kB	1/day / 1/day
RPWS_LOW_RATE_FULL	3 MB/15 MB	1/hr / 1/hr
RPWS_WIDEBAND_BROWSE	150 kB/150 kB	1/day / 1/hr
RPWS_WIDEBAND_FULL	var (10 MB)	var / 1/hr
RPWS_WAVEFORM_BROWSE	n/a / 150 kB	n/a / 1/day
RPWS_WAVEFORM_FULL	n/a / 15 MB	n/a / 1/day
Totals			2 mo / 1 mo	24 / 48

The current plan is for each RPWS Standard Product Archive Volume to contain at most ~4.7 Gbytes of data, including documentation and ancillary files, based on the storage capacity of DVD-R media. Some volumes may be under-filled to keep the time intervals covered by a given volume at reasonable sizes and to cover standard intervals (e.g. 1 year or 1 month). We anticipate including all of the data types in Tables 1 and 2 for a given interval on the same volume.

According to the archive schedule, we estimate approximately 4 DVD-R volumes will encompass the cruise phase and be delivered by 1 July 2005. We anticipate delivering approximately 3 DVD-Rs per quarter, thereafter. The most recent data in a delivery will be approximately 1 year old, the time required to generate and validate the delivered data.

3.3 Interface Media Characteristics

All DVD volumes in the Cassini RPWS Standard Product Archive Collection will conform to the Digital Versatile Disk UDF-ISO Bridge format (with ISO-9660 level 2 compatibility).

3.4 Backup and Duplicates

UCLA keeps three copies of each DVD-R volume. One volume is the archive copy and is placed in an on-line drive at UCLA in order to make the data web accessible. The second copy is a backup that can be used if a DVD-R becomes lost or damaged. The third copy is a copy to be kept offsite from UCLA. UCLA will make copies of the one DVD-R provided by the University of Iowa to fulfill these needs. Another copy is sent to the NSSDC. The University of Iowa will keep at least one copy of each DVD-R.

3.5 Labeling and Identification

Each Cassini RPWS DVD-R bears a volume ID using the last two components of the volume set ID [PDS Standards Reference, 2002]. The RPWS volume set is comprised of one sequence of volumes with the volume set ID of USA_NASA_PDS_CORPWS_0nnn. The RPWS volumes will be members of the MISSION TO SATURN volume series.

4. Archive Volume Contents

This section describes the contents of the Cassini RPWS Standard Product Archive Collection volumes, including the file names, file contents, and file types. RPWS team members are responsible for providing all the files except where otherwise noted. The complete directory structure is shown in Appendix A. All the ancillary files described herein appear on each RPWS volume, except where noted.

4.1 Root Directory Contents

The following files are contained in the Root Directory.

File Name File Contents

AAREADME.TXT This file completely describes the volume organization and contents (PDS label attached).

AAREADME.HTM Hypertext version of AAREADME.TXT

AAREADME.LBL A PDS detached label that describes AAREADME.HTM

ERRATA.TXT A cumulative listing of comments and updates concerning all RPWS Standard Data Products on all RPWS digital versatile disk volumes in the volume set published so far.

VOLDESC.CAT A description of the contents of this volume in a PDS format readable by both humans and machines.

4.2 INDEX Directory Contents

The following files are contained in the Index Directory.

File Name File Contents

INDXINFO.TXT A description of the contents of this directory

CUMINDEX.TAB A table listing all RPWS products published so far in this volume set, including the data on this volume.

CUMINDEX.LBL A PDS detached label that describes CUMINDEX.TAB

INDEX.TAB A table listing all RPWS products on this volume

INDEX.LBL A PDS detached label that describes INDEX.TAB

4.3 DOCUMENT Directory Contents

The following files are contained in the Document Directory.

File Name File Contents

DOCINFO.TXT A description of the contents of this directory

VOLSIS.HTM The Archive Volume SIS (this document) as hypertext

VOLSIS.TXT The Archive Volume SIS (this document) in ASCII format

VOLSIS.PDF The Archive Volume SIS (this document) in Adobe Acrobat format

VOLSIS.WPD The Archive Volume SIS (this document) in Wordperfect format

VOLSIS.LBL A PDS detached label that describes the HTM, WPD, and PDF versions of the VOLSIS document.

RPWSINST.HTM A description of the RPWS instrument based on the Space Science Reviews article listed in section 2.3, Applicable Documents in hypertext format.

RPWSINST.WPD A description of the RPWS instrument based on the Space Science Reviews article listed in section 2.3, Applicable Documents in Wordperfect format.

RPWSINST.PDF A description of the RPWS instrument based on the Space Science Reviews article listed in section 2.3, Applicable Documents in Acrobat format.

RPWSINST.LBL A PDS detached label that describes HTM, WPD, and PDF versions of the RPWSINST document.

RPWSUG.HTM RPWS Flight Software User’s Guide in hypertext format

RPWSUG.PDF RPWS Flight Software User’s Guide in Acrobat format

RPWSUG.SXW RPWS Flight Software User’s Guide in StarOffice format

RPWSUG.LBL A PDS detached label that describes HTM, PDF, and SXW versions of the RPWSUG document.

RPWSCAL.HTM A description of the RPWS calibration process, calibration parameters and related information in hypertext format.

RPWSCAL.PDF A description of the RPWS calibration process, calibration parameters and related information in Acrobat format.

RPWSCAL.WPD A description of the RPWS calibration process, calibration parameters and related information in Wordperfect format.

RPWSCAL.LBL A PDS detached label that describes the HTM, PDF, and WPD versions of the RPWSCAL document.

WBRWFR.TXT Information on accessing and calibrating WBR and WFR data.

4.4 CATALOG Directory Contents

The following files are contained in the Catalog Directory.

File Name File Contents

CATINFO.TXT A description of the contents of this directory

KEYDS.CAT PDS data set catalog description of the Key Parameter data set

RAWDS.CAT PDS data st catalog description of the Raw Complete data set.

LRFULLDS.CAT PDS data set catalog description of the Low Rate Full data set

WBFULLDS.CAT PDS data set catalog description of the Wideband Full data set

WFFULLDS.CAT PDS data set catalog description of the Waveform Full data set

CO_HOST.CAT PDS instrument host (spacecraft) catalog description of the Cassini Orbiter spacecraft (To be provided by the Cassini Project).

RPWSINST.CAT PDS instrument catalog description of the RPWS instrument.

MISSION.CAT PDS mission catalog description of the Cassini mission (To be provided by the Cassini Project).

PERSON.CAT PDS personnel catalog description of RPWS Team members and PPI Node members involved with the generation of the RPWS data products.

REF.CAT RPWS-related references mentioned in other *.CAT files. (To be provided by the Cassini Project).

4.5 BROWSE Directory Contents and Naming Conventions

The Browse directory contains frequency-time spectrogram images of the full-resolution numerical data for the Key Parameters, Low Rate, Wideband, and Waveform data sets and ancillary information files produced by the RPWS team. The image files, in Portable Network Graphics (PNG) format, from the various data sets are stored in separate subdirectories on the main data directory.

4.5.1 Required Files

In the BROWSE directory there is a file named BROWINFO.TXT that is an ASCII text description of the contents of the directory and its subdirectories. Text documentation files will have attached PDS labels. One detached PDS label file will describe all of the image files in the BROWSE directory and its subdirectories, and has the suffix “.LBL”.

4.5.2 BROWSE/RPWS_KEY_PARAMETERS Directory Contents

Low Rate Browse (RPWS_KEY_PARAMETERS_BROWSE) consists of Portable Network Graphics (PNG) frequency-time spectrogram images of the low rate key parameter spectral information observed by the RPWS. There will be two image files for each day for which data exists. One will include the electric field spectrogram and the other will include the magnetic field spectrogram. File names will be of the form Tyyyyddd_E_KPB.PNG and Tyyyyddd_B_KPB.PNG where yyyyddd is the date of the data.

4.5.3 BROWSE/RPWS_LOW_RATE_FULL Directory Contents

Low Rate Browse (RPWS_LOW_RATE_BROWSE) consists of Portable Network Graphics (PNG) frequency-time spectrogram images of the low rate spectral information observed by the RPWS. There will be two image files for each day for which data exists. One will include the electric field spectrogram and the other will include the magnetic field spectrogram. File names will be of the form Tyyyyddd_E_LRB.PNG and Tyyyyddd_B_LRB.PNG where yyyyddd is the date of the data.

4.5.4 BROWSE/RPWS_WIDEBAND_FULL Directory Contents

Wideband Browse (RPWS_WIDEBAND_BROWSE) consists of Portable Network Graphics (PNG) frequency-time spectrogram images of the wideband observations acquired by the RPWS. Subsets of this data set will include data in the 10- and 80-kHz wideband receiver data (baseband) and high-frequency wideband receiver data acquired via frequency translation through the High Frequency Receiver from frequencies between 125 kHz and 16 MHz. Since these data are typically acquired for brief intervals with long time intervals in between, there will be one file for each acquisition interval. File names will be of the form Tyyyyddd_hhmm_xxxKHZ_WBRFR.PNG where yyyyddd_hhmm is the starting date and time of the included data and xxx refers to the analysis band such as 10K, 75K, 125K, 8025K. The 10-kHz and 75-kHz files will be segregated into separate directories. The frequency-translated data will be in another separate directory, although this directory will include any analysis band other than 10- or 75-kHz.

4.5.5 BROWSE/RPWS_WAVEFORM_FULL Directory Contents

Waveform Browse (RPWS_WAVEFORM_BROWSE) data are of Portable Network Graphics (PNG) frequency-time spectrogram images of the 5-Channel Waveform Receiver observations acquired by the RPWS. There will be one file per day for each analysis bandwidth (26 Hz or 2.5 kHz). File names will be of the form Tyyyyddd_26HZ_WFRFR.PNG or Tyyyyddd_2_5KHZ_WFRFR.PNG where yyyyddd is the date of the data.

4.6 DATA Directory Contents and Naming Conventions

The Data directory contains the actual data products and ancillary information files produced by the RPWS team. The data files from the various data sets are stored in separate subdirectories on the main data directory.

4.6.1 Required Files

The DATA directory contains a description of the contents of all of the subdirectories in a file called DATAINFO.TXT. Text documentation files will have attached PDS labels and data files will have detached labels. Detached PDS label files have the same root name as the file they describe, but have the suffix “.LBL”. In directories where there are multiple files with the same internal table structure, the table column description is included in a single format file (.FMT) that is referenced by a pointer within the PDS label files. This prevents the needless repetition of information that is not changing within the PDS label files. In directories where uncalibrated data are provided, files required for calibrating the data are included (.CAL).

4.6.2 DATA/RPWS_RAW_COMPLETE Directory Contents

Raw Complete (RPWS_RAW_COMPLETE) is a data set which includes all RPWS telemetry data in a reformatted telemetry packet form. Since much of the RPWS data is compressed on the spacecraft, this data set includes uncompressed data so that a user would not have to determine how to correctly uncompress several different types of data using different compression schemes. Also, since the RPWS telemetry packets include a secondary level of organization we refer to as minipackets (an RPWS minipacket includes telemetry from a single RPWS receiver for a given interval of time, usually a measurement cycle), and since the minipackets can be segmented - split across original telemetry packets, we have unsegmented these and made sure that all the data for a given minipacket is in one cohesive structure. Because of these simplifications, the reformatted telemetry packets are not fixed length and are not well-suited to description by PDS labeling standards. Also, since all of these data are archived in either calibrated or at least further reformatted into fixed-length records with standard PDS labeling elsewhere, we have included only minimal PDS labels for these records. Documentation (the RPWS Software Users Guide) included in the DOCUMENT directory provide information on how to extract and use data from this data set, should that extraordinary circumstance arise. There will be one file per hour (for hours during which data exist with file names of the form Tyyyyddd_hh_RAW.PKT where yyyyddd_hh is the year and day of year of the data and hh is the hour of the day of the data.

4.6.3 DATA/RPWS_KEY_PARAMETERS Directory Contents

Key Parameters (RPWS_KEY_PARAMETERS) is a data set which contains a summary of the RPWS spectral information as a function of time with parameters which have been agreed to between RPWS and other MAPS instruments as being suitable for the RPWS contribution to the MAPS Key Parameter Data Set. This parameter set is in the form of an ASCII flat file including the amplitude (electric and magnetic field spectral densities) of waves in 10 logarithmically-spaced frequency bands per decade of frequency with 1-minute temporal resolution and is generated by averaging full resolution measurements falling within the frequency and time bins. There will be one file per day for days when data exist. File names will be of the form RPWS_KEY__yyyyddd_v.TAB where yyyyddd is the date of the data and v is the version. Note that this version represents the number of times the file has been written and is not to be confused with the PDS product version or data set version.

4.6.4 DATA/RPWS_LOW_RATE_FULL Directory Contents

Low Rate Full Resolution Calibrated (RPWS_LOW_RATE_FULL) is a data set including all spectral density measurements acquired by the RPWS in units of electric or magnetic field spectral density. For days when data exist, there will be a minimum of 3 files per day. One of these files will include data from the Low Frequency Receiver (LFR), one will include data from the Medium Frequency Receiver (MFR), and one will include data from the High Frequency Receiver (HFR). There may be a fourth file which includes data from the Medium Frequency Digital Receiver (MFDR). This last data source is similar to that from the LFR except that is derived from the 2.5-kHz mode of the waveform receiver and can be used to replace or supplement the data from the MFR. Each file will contain a binary table with columns for time (both SCET and SCLK), sensor, and an array of spectral densities for the set of frequency channels described in the file header. When mode changes result in a change in this set of channels, a different file for that receiver will be used. This is most likely for the HFR, since the HFR has extensive flexibility. File names will be of the forms

Tyyyyddd_LFRn.DAT,

Tyyyyddd_MFRn.DAT,

Tyyyyddd_HFRn.DAT, and

Tyyyyddd_MFDRn.DAT

for the four types of files described above, respectively. In each, yyyyddd is the date of the data. For each ‘n’ is incremented from 0 for each different set of channel configurations for that receiver.

4.6.5 DATA/RPWS_WIDEBAND_FULL Directory Contents

Wideband Full Resolution Uncalibrated (RPWS_WIDEBAND_FULL) data are the full resolution waveform data from the RPWS Wideband Receiver in uncalibrated form. This data set will include procedures, code examples, and the necessary information to derive calibrated electric or magnetic field spectral densities from the uncalibrated data. There will be at least one file for each hour when data exist. Data having different analysis frequency bands will be in separate files. Further, different files will be used when the number of samples in a time series is different within the same hour. This is so each file will have fixed-length records. File names will be of the forms:

Tyyyyddd_hh_10KHZn_WBRFR.DAT

Tyyyyddd_hh_75KHZn_WBRFR.DAT

Tyyyyddd_hh_xxxKHZn_WBRFR.DAT

where yyyyddd is the date of the data, hh is the hour of the data, and xxx is the frequency band when frequency translated data are used, such as 125, 8025, etc. The n differentiates between files with different record lengths as follows:

n Record Data Length (bytes)

1 1024

2 2048

4 4096

6 6144

8 8192

9 20480

D Dust waveform (1024 bytes)

In addition to the above data lengths, there are 32 bytes of status in each record.

4.6.6 DATA/RPWS_WAVEFORM_FULL Directory Contents

Waveform Full Resolution Uncalibrated (RPWS_WAVEFORM_FULL) data are the full resolution waveform data from the RPWS Wideband Receiver in uncalibrated form. This data set will include procedures, code examples, and the necessary information to derive calibrated electric and magnetic field spectral densities from the uncalibrated data. There will be one file per day for each of the two analysis bandwidths (25 Hz or 2.5kHz). Different files will be used when the number of samples in the time series is different, so as to have fixed-length records in the files. File names will be of the forms

Tyyyyddd_26HZ_WFFRn.DAT and

Tyyyyddd_2_5KHZ_WFFRn.DAT

where yyyyddd is the date of the data. The n differentiates between files with different record lengths as follows:

n Record Data Length (bytes)

1 1024

2 2048

4 4096

6 6144

8 8192

9 20480

In addition to the above data lengths, there are 32 bytes of status in each record. Note that in this data set, data from all of the sensors (whether 1, 2, 3, or 5) are contained in the same file; a parameter in each record gives the sensor for that particular waveform time series.

4.6.7 DATA/ANCILLARY Directory Contents

The primary contents of this directory will be instrument operation and sequence information which is useful in finding and using the data in this archive. For each sequence, there will be an overview TXT file which will list the set of Instrument Expanded Blocks (IEBs) used in the sequence and a brief, one line, description of each IEB and a pointer to a TXT file providing a detailed description of the IEB. For each sequence there will also be a TAB file containing a set of Spacecraft Event Time (SCET) time tags, IEB Trigger number or other RPWS command mnemonic or short description of a series of commands (e.g. a series of IEB load commands) which can be used to understand which IEB was invoked at which times.

Note that we assume that the full set of SPICE kernels are being archived by NAIF; we do not propose to duplicate those archives within the RPWS archive.

4.7 EXTRAS Directory Contents

This directory contains volume navigation HTML files or other files which facilitate the use of the volume, but which are not considered part of the archive, itself.

5. Archive Volume Format

This section describes the format of Cassini RPWS Standard Product Archive Volumes. Data that comprise the RPWS Standard Product Archives will be formatted in accordance with Planetary Data System specifications [Planetary Science Data Dictionary, 2002; PDS Data Preparation Workbook, 1995; PDS Standards Reference, 2002].

5.1 Disk Format

All DVD volumes in the Cassini RPWS Standard Product Archive Collection will conform to the Digital Versatile Disk UDF-ISO Bridge format (with ISO-9660 level 2 compatibility).

5.2 File Formats

The following section describes file formats from the kinds of files contained on archive volumes. For more information, see the PDS Data Preparation Workbook [1995], Appendix B.

5.2.1 Document File Format

Document files with the .TXT suffix exist in most directories. They are ASCII files with embedded PDS labels. All TXT document files consist of variable-length records (lines), terminated with carriage return (ASCII 13) and line feed (ASCII 10) character pairs. This is the standard Microsoft text file format and can be easily accommodated by MacOS, UNIX, and other common operating systems.

In general, documents are provided in ASCII text format. However, if the document contained in the DOCUMENT directory contains formatting and figures that cannot be rendered as ASCII text, then the document is also given in hypertext format. The hypertext file contains ASCII text plus hypertext markup language (HTML) commands that enable it to be viewed in a web browser such as Netscape or Internet Explorer. Hypertext documents may reference ancillary files such as images that are incorporated into the document by the web browser. All image files in this archive will be in PNG format. Native formats for most documents are also provided, such as Corel Wordperfect. Adobe Acrobat versions of most documents are also provided.

5.2.2 Tabular File Format

Tabular files (.TAB extension) exist in the INDEX, RPWS_KEY_PARAMETERS, and ANCILLARY directories. Tabular files are ASCII files formatted for direct reading into many database management systems on various computers. Fields normally are separated by commas or whitespace, and character fields are enclosed in double quotation marks (“). Character fields are padded with spaces to keep quotation marks in the same columns of successive records. Character fields are left justified, and numeric fields are right justified. The “start byte” and “bytes” values listed in the labels do not include the commas between fields or the quotation marks surrounding character fields. The records are of fixed length, and the last two bytes of each record contain the ASCII carriage return and line feed characters. This allows a table to be treated as a fixed length record file on computers that support this file type and as a text file with embedded line delimiters on those that don’t.

All tabular files are described by detached PDS label files. A detached PDS label file has the same name as the data file it describes, with the extension .LBL; for example, the file INDEX.TAB is accompanied by the detached label file INDEX.LBL in the same directory.

5.2.3 PDS Label Format

All data files in the RPWS Standard Product Archive Collection have PDS labels [Planetary Science Data Dictionary, 2002; PDS Standards Reference, 2002]. These labels all are detached from the data files (same file name prefix, .LBL suffix).

A PDS label, whether embedded or detached from its associated file, provides descriptive information about the associated file. The PDS label is an object-oriented structure consisting of sets of ‘keyword = value’ declarations. The object to which the label refers (e.g. IMAGE, TABLE, etc.) is denoted by a statement of the form:

^object = location

in which the carat character (^, also called a pointer in this context) indicates where to find the object. In a PDS label, the location denotes the name of the file containing the object, along with the starting record or byte number, if there is more than one object in the file. For example:

^HEADER=(“98118.DAT”,1)

^TABLE=(“98118.DAT”,1025 <BYTES>)

indicates that the HEADER object begins at record 1 and that the TABLE object begins at byte 1025 of the file 98118.DAT. The file 98118.DAT must be located in the same directory as the detached label file.

Below is a list of the possible formats for the ^object definition in labels in this product.

^object = n

^object = n <BYTES>

^object = “filename.ext”

^object = (“filename.ext”, n)

^object = (“filename.ext”, n <BYTES>)

where

n is the starting record or byte number of the object, counting from the beginning of the file (record 1, byte 1),

<BYTES> indicates that the number given is in units of bytes (the default is records),

filename is the up-to-27-character, alphanumeric upper-case file name,

ext is the up-to-3-character upper-case file extension.

All detached labels are ASCII text files with lines terminated with carriage return (ASCII 13) and line feed (ASCII 10) character pairs. Some may be padded out with spaces to form 80-byte fixed-length records. These text formats may be easily read on all common operating systems.

5.2.4 Catalog File Format

Catalog files (suffix .CAT) exist in the Root and Catalog directories. They are formatted in an object-oriented structure consisting of sets of ‘keyword = value’ declarations.

5.2.5 Index File Format

The Index file format is an ASCII table containing information about the data products included in this volume and a cumulative list for the collection including this volume. It includes information such as the Volume ID, Product ID, start SCET, path relative to the root of the volume, data set ID, and RPWS receiver which produces the data. A format description file for the Index file is given in Appendix G.

5.2.6 Science Data File Formats

5.2.6.1 RPWS_KEY_PARAMETERS_BROWSE Data Product Format

These will be PNG formatted images of frequency-time spectrograms of the key parameters data with one electric and one magnetic spectrogram per day for which there are data.

5.2.6.2 RPWS_KEY_PARAMETERS Data Product Format

This is an ASCII flat file table with a time tag followed by averages in frequency and time for both electric and magnetic field spectral densities. There are 70 (TBD) electric and 40 (TBD) magnetic channels and the time resolution is 1-minutes. These characteristics are not definite until the MAPS working group have concluded their discussion of the MAPS key parameters. The table will consist of a time (SCET) column followed by ~ 70 electric field spectral density values and ~40 magnetic field spectral densities. The record header will define the center frequencies of these channels. The time will refer to the beginning time of the averaging interval. A more detailed file format is given in Appendix B in the RPWSKEY.FMT file. A data quality flag is also included. If this flag is 0, then the confidence in the data included in this record is high. If the flag is 1, then there is some question about the data in the record, and they should be used with caution.

5.2.6.3 RPWS_RAW_COMPLETE Data Product Format

The Raw Complete data files are variable length binary formatted files with a complex structure including embedded minipackets segregating telemetry from the various RPWS receivers into separate substructures. The format is given in the Software Users Guide included in the DOCUMENT directory.

5.2.6.4 RPWS_LOW_RATE_BROWSE Data Product Format

These will be PNG formatted images of frequency-time spectrograms of the low-rate survey data with one electric and one magnetic spectrogram per day for which there are data.

5.2.6.5 RPWS_LOW_RATE_FULL Data Product Format

There will be four different types of files included in this data set as described in section 4.6.3. Each will be a binary table which has time columns (SCET and SCLK), a sensor column, and an array of spectral densities. The header in each file will list the center frequencies of the channels for which spectral densities are given. Each record will include a complete set of spectral densities for the set of channels indicated, with the time being the start time of the data acquisition for the spectral densities. A detailed file format is given in Appendix D embedded in the sample RPWS_LOW_RATE_FULL label file.

5.2.6.6 RPWS_WIDEBAND_BROWSE Data Product Format

These will be PNG formatted images of frequency-time spectrograms of the wideband data. There will be one image for each contiguous set of WBR observations in a given frequency range (i.e. 10 kHz, 75 kHz, or specific frequency selection of HF-WBR data).

5.2.6.7 RPWS_WIDEBAND_FULL Data Product Format

This is a binary time series data set. Each record will include time information (SCET and SCLK, sensor, and gain state (required for calibration) as well as a time series of waveform measurements. A detailed description of the file format is in Appendix E in RPWSWBRFR.FMT.

5.2.6.8 RPWS_WAVEFORM_BROWSE Data Product Format

These will be PNG formatted images of 5-channel frequency-time spectrograms of the waveform data. There will be one image including all five channels for each day as long as there is only one set of channels selected for that day. For days where the channel selections change, there will be an image for each selected set of channels. For example, if a particular day has a two-hour interval of delta-n/n observations from Titan but the rest of the day has the more typical Ex, Ez, Bx, By, Bz set, then two images will be produced. One will cover the entire day except for the 2-hour Titan observation and the other will be a two-hour set of frequency-time spectrograms representing the delta-n/n observations.

5.2.6.9 RPWS_WAVEFORM_FULL Data Product Format

6. Support Staff and Cognizant Persons

Table 3: RPWS Archive Collection Support Staff

Cassini RPWS Team
Dr. Donald A. Gurnett	Dept. Of Physics & Astronomy The University of Iowa Iowa City, IA 52242	319-335-1697	donald-gurnett@uiowa.edu
Dr. William S. Kurth	Dept. Of Physics & Astronomy The University of Iowa Iowa City, IA 52242	319-335-1926	william-kurth@uiowa.edu
Mr. Larry J. Granroth	Dept. Of Physics & Astronomy The University of Iowa Iowa City, IA 52242	319-335-2536	larry-granroth@uiowa.edu
UCLA - PPI
Mr. Steven P. Joy	UCLA-IGPP 405 Hilgard Ave. Los Angeles, CA 90095-1567	310-826-3506	sjoy@igpp.ucla.edu

Appendix A. Directory Structure

The following directory structure is applicable to each Cassini RPWS Standard Product Archive Volume. In the cases where all data product types are not acquired during a given time interval covered by a volume, the relevant directories will simply be empty except for the INFO.TXT file. The directories are discussed in detail in the text of this document, except for EXTRAS, which contains the HTML interface accessible through AAREADME.HTM.

Root Directory

---- CATALOG

---- DOCUMENT

---- BROWSE

| |

| ---- RPWS-KEY_PARAMETERS

| |

| ---- RPWS_LOW_RATE_FULL

| |

| ----RPWS_WIDEBAND_FULL

| |

| ---- RPWS_WAVEFORM_FULL

---- DATA

| |

| ----RPWS_KEY_PARAMETERS

| |

| ----RPWS_RAW_COMPLETE

| |

| ----RPWS_LOW_RATE_FULL

| |

| ---- RPWS_WIDEBAND_FULL

| |

| ---- RPWS_WAVEFORM_FULL

| |

| ---- ANCILLARY

---- EXTRAS

| |

| ---- SOFTWARE

---- INDEX

---- LABEL

Appendix B: Sample Labels for RPWS_KEY_PARAMETERS

Data Set Information Catalog File: KEYDS.CAT

PDS_VERSION_ID = PDS3

LABEL_REVISION_NOTE = "

2003-01-12, William Kurth (U. IOWA), initial;

2003-06-26, William Kurth (U. IOWA), general revision;

2004-02-10, William Kurth (U. IOWA), fixed liens;"

RECORD_TYPE = STREAM

OBJECT = DATA_SET

DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0"

OBJECT = DATA_SET_INFORMATION

DATA_SET_NAME = "

CASSINI V/E/J/S/SS RPWS SUMMARY KEY PARAMETER 60S V1.0"

DATA_SET_COLLECTION_MEMBER_FLG = "N"

DATA_OBJECT_TYPE = TABLE

ARCHIVE_STATUS = IN_PEER_REVIEW

START_TIME = 1997-298T00:00:00.000Z

STOP_TIME = NULL

DATA_SET_RELEASE_DATE = 2003-06-30

PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"

DETAILED_CATALOG_FLAG = "N"

DATA_SET_TERSE_DESC = "

The Cassini Radio and Plasma Wave Science (RPWS) resampled

summary key parameter data set includes summary spectral

information calibrated in units of spectral density for the

entire Cassini mission."

ABSTRACT_DESC = "

The Cassini Radio and Plasma Wave Science (RPWS) calibrated

summary key parameter data set includes reduced temporal and

spectral resolution spectral information calibrated in units of

spectral density for the entire Cassini mission. This data set

includes calibrated values binned and averaged within 1 minute by

0.1 decade spectral channels for all times during the mission

including the two Venus flybys, the Earth flyby, the Jupiter

flyby, interplanetary cruise, and the entire Saturn tour. Data

for this data set are acquired by the RPWS Low Frequency Receiver

(LFR), Medium Frequency Receiver (MFR), and High Frequency

Receiver (HFR). Data are presented in a set of

fixed-record-length tables. This data set is intended to provide

numerical summary data which can be used in conjunction with other

Cassini fields and particles key parameter data sets to establish

trends, select events, or simply as a browse data set for the

Cassini RPWS archive. This data set should be among the first

used by a user of any of the RPWS archive as it will lead one to

information required to search for more detailed or highly

specialized products."

CITATION_DESC = "Kurth, W.S., T.F. Averkamp, and

L.J. Granroth, CASSINI V/E/J/S/SS RPWS SUMMARY KEY PARAMETER

60S V1.0, CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0, NASA

Planetary Data System, 2004."

DATA_SET_DESC = "

Data Set Overview

=================

The Cassini Radio and Plasma Wave Science (RPWS) calibrated summary

key parameter data set includes reduced temporal and spectral

resolution spectral information calibrated in units of spectral

density for the entire Cassini mission. This data set includes

calibrated values binned and averaged within 1 minute by 0.1 decade

spectral channels for all times during the mission including the two

Venus flybys, the Earth flyby, the Jupiter flyby, interplanetary

cruise, and the entire Saturn tour. Data for this data set are

acquired by the RPWS Low Frequency Receiver (LFR), Medium Frequency

Receiver (MFR), and High Frequency Receiver (HFR). Data are

presented in a set of fixed-record-length tables. This data set is

intended to provide numerical summary data which can be used in

conjunction with other Cassini fields and particles key parameter

data sets to establish trends, select events, or simply as a browse

data set for the Cassini RPWS archive. This data set should be

among the first used by a user of any of the RPWS archive as it will

lead one to information required to search for more detailed or

highly specialized products.

Parameters

==========

This data set comprises electric and magnetic field spectral

densities for each sensor, binned and averaged (median) into moderate

resolution frequency and time bins. We use 10 spectral channels per

decade logarithmically spaced in frequency, usually from 1 Hz to 16

MHz, and a 1-minute time step.

Processing

==========

Data in this data set were processed by the use of a number of

software programs which assemble segmented mini-packets in the raw

telemetry packets into complete sets, de-compress the data that were

compressed by one of a number of compression algorithms by the RPWS

flight software onboard, apply conversion lookup tables or

algorithms to convert telemetry data numbers into physical units,

make any corrections required for antenna capacitive loading or

other effects, bin the measurements into frequency and time bins,

and then determine the median of all measurements within a bin.

These data are calibrated using the best calibration tables and

algorithms available at the time the data were archived. See

chapters 5 - 11 of the RPWSCAL document in the DOCUMENT directory

for details on how the data included in this data set were

calibrated. Should a significant improvement in calibration become

available, an erratum will be noted in the erratum section. Later

versions of data products may contain better calibrations. It

should be noted, however, that since measurements from different

sensors are binned (via finding the median measurement in the bin)

the resulting spectrum is an amalgamation of different sensors

oriented in different directions. Hence, the detailed

interpretation of this data set is not necessarily straight-

forward. If the user is interested in the best calibrated value

with a minimum of interpretational issues, the Low Rate Full

resolution data product would be the best source of information.

Data

====

The RPWS key parameter data set includes tables of wave spectra as a

function of time using measurements from each of the various

receivers of the RPWS, including the LFR, MFR, and HFR. Each table

will contain fixed-length records including columns for time and

spectral densities for each channel.

Ancillary Data

==============

Ancillary data included with this data set collection include a

series of files that describe the modes of the RPWS as a function of

time and provide a time-ordered listing of Instrument Expanded Block

(IEB) trigger commands (the mode by which the RPWS is reconfigured).

Also a detailed description of each of the modes (or IEBs) is

provided.

Other data which are ancillary to this data set but which are

archived separately from this collection are the Navigation and

Ancillary Information Facility's SPICE kernels describing the

position and attitude of Cassini and various solar system bodies as

a function of time.

Coordinate System

=================

The data in this data set are measurements of wave electric and

magnetic fields measured by the RPWS electric and magnetic sensors.

These fields are presented as detected by the sensors and are not

rotated into any other coordinate system. If desired the SPICE

kernels can be used with the SPICE toolkit to convert from the

spacecraft frame to virtually any frame which may be of use in

analyzing these data. However, for many purposes, the wave

amplitudes are extremely useful and may be entirely adequate with no

coordinate transformations at all.

Software

========

Since the data are provided in text files as fully calibrated

amplitudes, no example software is provided for reading these data.

However, a platform-independent Java (TM) application is provided in

EXTRAS/SOFTWARE/KEY_BROWSE.JAR which can read these data and produce

spectrograms with user-selectable options. See README.TXT in the

same directory for further information.

Media/Format

============

These data are supplied to the Planetary Data System on DVD-R media

using formats and standards of the PDS for such media."

CONFIDENCE_LEVEL_NOTE = "

Confidence Level Overview

=========================

This data set contains all low rate key parameter data for the

Cassini RPWS instrument for the intervals described In the product

label files. Every effort has been made to ensure that all data

returned to JPL from the spacecraft are included and that the

calibration is accurate. A column in each record indicates whether

the confidence in the data in that record is high (0) or not (9).

The middle band of the MFR (Band 2, 180 - 1500 Hz) has shown a

tendency to have an increased noise level by as much as 10 dB at

times, although there is no current explanation for this or

known factor which would enable this condition to be predicted.

In some instrument modes data are collected in the high band of

the WFR which can be used to replace the data in MFR Band 2,

although this replacement has not been done for this data set.

The replacement data are included in the low resolution, fully

calibrated data set, however.

Review

======

The RPWS calibrated summary key parameter data will be reviewed

internally by the Cassini RPWS team prior to release to the PDS.

The data set will also be peer reviewed by the PDS.

Data Coverage and Quality

=========================

All data in the intervals described in the product label files are

included, to the best of our knowledge and attempts to determine

completeness. In general, the instrument was operated only briefly

during early tour for the following intervals:

1. Antenna deployment 1997-10-25T00:00 - 1997-10-26T05:30

2. Venus 1 flyby 1998-04-26T12:54 - 1998-05-08T19:21*

3. Instrument Checkout 1998-12-30T09:10 - 1999-01-19T05:40

4. Venus 2 flyby 1999-06-24T09:08 - 1999-06-24T21:20

5. Earth flyby 1999-08-13T17:39 - 1999-09-14T22:20

*Actual interval for science data is much shorter than this.

Beginning in February of 2000 the instrument was operated

more-or-less continuously; two gaps of the order of six weeks were

incurred for the purposes of loading new attitude control and

command and data system flight software, gaps of a few days each

were incurred approximately twice per year because of Huygens Probe

testing, and gaps of several days in duration occurred during solar

conjunction periods prior to 2002. Remaining gaps are due to

spacecraft anomaly resolution or simply to downlink gaps, some of

which were imposed by limitations on DSN station availability.

Limitations

===========

The only known measurement quality issue is occasional elevated

noise levels (by a few to 10 dB) in the second band of the MFR.

During tour, it is anticipated that data from the Waveform Receiver

(WFR) sometimes referred to as the medium frequency digital receiver

(MFDR) can be substituted for these in the full resolution data

product (RPWS LOW RATE FULL)."

END_OBJECT = DATA_SET_INFORMATION

OBJECT = DATA_SET_TARGET

TARGET_NAME = VENUS

END_OBJECT = DATA_SET_TARGET

OBJECT = DATA_SET_TARGET

TARGET_NAME = EARTH

END_OBJECT = DATA_SET_TARGET

OBJECT = DATA_SET_TARGET

TARGET_NAME = JUPITER

END_OBJECT = DATA_SET_TARGET

OBJECT = DATA_SET_TARGET

TARGET_NAME = SATURN

END_OBJECT = DATA_SET_TARGET

OBJECT = DATA_SET_TARGET

TARGET_NAME = SOLAR_SYSTEM

END_OBJECT = DATA_SET_TARGET

OBJECT = DATA_SET_HOST

INSTRUMENT_HOST_ID = CO

INSTRUMENT_ID = RPWS

END_OBJECT = DATA_SET_HOST

OBJECT = DATA_SET_REFERENCE_INFORMATION

REFERENCE_KEY_ID = "GURNETTETAL2004"

END_OBJECT = DATA_SET_REFERENCE_INFORMATION

END_OBJECT = DATA_SET

END

Sample RPWS_KEY_PARAMETERS Label File

PDS_VERSION_ID = PDS3

DESCRIPTION = "RPWS_KEY__1999230_0 contains Cassini Radio

and Plasma (RPWS) key parameter data for the

time period between 1999-230T00:00:00.000 and

1999-231T00:00:00.000 and includes the

following targets:

EARTH , SOLAR SYSTEM ."

/* pds label for a rpws spectogram */

RECORD_TYPE = FIXED_LENGTH

RECORD_BYTES = 1175

FILE_RECORDS = 1385

/* pointers to start records of objects in file, std ref3.5:5.3.3.2 */

^LRKEY_FREQUENCY_TABLE = ("RPWS_KEY__1999230_0.TAB",1)

^LRKEY_SPECTRAL_DENSITY_TABLE = ("RPWS_KEY__1999230_0.TAB",2)

/* identification data elements - data product labels, std ref3.5:5.3.4.1 */

DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0"

PRODUCT_ID = "RPWS_KEY__1999230_0_V1"

PRODUCT_TYPE = DATA

INSTRUMENT_HOST_NAME = "CASSINI ORBITER"

INSTRUMENT_HOST_ID = CO

INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE"

INSTRUMENT_ID = RPWS

MISSION_PHASE_NAME = {"EARTH ENCOUNTER",

"INTERPLANETARY CRUISE",

"VENUS 2 - EARTH CRUISE"}

TARGET_NAME = {"EARTH","SOLAR SYSTEM"}

START_TIME = 1999-230T00:00:00.000

STOP_TIME = 1999-231T00:00:00.000

SPACECRAFT_CLOCK_START_COUNT = "1/1313626007:150"

SPACECRAFT_CLOCK_STOP_COUNT = "1/1313712408:040"

PRODUCT_CREATION_TIME = 2004-03-03

STANDARD_DATA_PRODUCT_ID = RPWS_KEY_PARAMETERS

/* descriptive data elements */

OBJECT = LRKEY_FREQUENCY_TABLE

INTERCHANGE_FORMAT = ASCII

ROW_BYTES = 1175

ROWS = 1

COLUMNS = 3

OBJECT = COLUMN

NAME = BEGIN_TIME

DATA_TYPE = TIME

START_BYTE = 1

BYTES = 21

DESCRIPTION = "Spacecraft Event Time for the beginning of

the day."

END_OBJECT = COLUMN

OBJECT = COLUMN

NAME = DATA_QUALITY_FLAG

DATA_TYPE = ASCII_INTEGER

START_BYTE = 23

BYTES = 1

DESCRIPTION = "Data quality flag. 0=good & 9=bad."

END_OBJECT = COLUMN

OBJECT = COLUMN

NAME = FREQUENCY

DATA_TYPE = ASCII_REAL

START_BYTE = 24

BYTES = 1150

ITEMS = 115

ITEM_BYTES = 10

UNIT = "HZ"

DESCRIPTION = "Frequency of the spectral density data."

END_OBJECT = COLUMN

END_OBJECT = LRKEY_FREQUENCY_TABLE

OBJECT = LRKEY_SPECTRAL_DENSITY_TABLE

INTERCHANGE_FORMAT = ASCII

ROW_BYTES = 1175

ROWS = 1384

COLUMNS = 4

OBJECT = COLUMN

NAME = SCET

DATA_TYPE = TIME

START_BYTE = 1

BYTES = 21

DESCRIPTION = "Spacecraft Event Time for the spectral

density measurements. This is the center of

the 1-minute time period within which the

median value of the spectral density for this

time and frequency range was determined."

END_OBJECT = COLUMN

OBJECT = COLUMN

NAME = DATA_QUALITY_FLAG

DATA_TYPE = ASCII_INTEGER

START_BYTE = 23

BYTES = 1

DESCRIPTION = "Data quality flag. 0=good & 9=bad."

END_OBJECT = COLUMN

OBJECT = COLUMN

NAME = ELECTRIC_SPECTRAL_DENSITIES

DATA_TYPE = ASCII_REAL

START_BYTE = 24

BYTES = 730

ITEMS = 73

ITEM_BYTES = 10

UNIT = "V**2/M**2/HZ"

DESCRIPTION = "Calibrated spectral densities from the

electric antennas."

END_OBJECT = COLUMN

OBJECT = COLUMN

NAME = MAGNETIC_SPECTRAL_DENSITIES

DATA_TYPE = ASCII_REAL

START_BYTE = 754

BYTES = 420

ITEMS = 42

ITEM_BYTES = 10

UNIT = "NT**2/HZ"

DESCRIPTION = "Calibrated spectral densities from the

magnetic sensors."

END_OBJECT = COLUMN

END_OBJECT = LRKEY_SPECTRAL_DENSITY_TABLE

END

Appendix C: Sample Labels for RPWS_RAW_COMPLETE

Data Set Information Catalog File: RAWDS.CAT

PDS_VERSION_ID = PDS3

LABEL_REVISION_NOTE = "

2003-06-29, William Kurth (U. IOWA), initial;

2004-02-10, William Kurth (U. IOWA), fixed liens;"

RECORD_TYPE = STREAM

OBJECT = DATA_SET

DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-3-REFDR-ALL-V1.0"

OBJECT = DATA_SET_INFORMATION

DATA_SET_NAME = "

CASSINI V/E/J/S/SS RPWS RAW COMPLETE TLM PACKETS V1.0"

DATA_SET_COLLECTION_MEMBER_FLG = "N"

DATA_OBJECT_TYPE = TABLE

ARCHIVE_STATUS = IN_PEER_REVIEW

START_TIME = 1997-298T00:00:00.000Z

STOP_TIME = NULL

DATA_SET_RELEASE_DATE = 2003-06-30

PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"

DETAILED_CATALOG_FLAG = "N"

DATA_SET_TERSE_DESC = "

The Cassini Radio and Plasma Wave Science (RPWS) raw complete data

set includes all RPWS telemetry data for the entire Cassini

mission."

ABSTRACT_DESC = "

The Cassini Radio and Plasma Wave Science (RPWS) raw complete data

set includes all RPWS telemetry data for the entire Cassini

mission. This data set includes raw telemetry values for each

frequency channel for each sensor for all times during the mission

including the two Venus flybys, the Earth flyby, the Jupiter

flyby, interplanetary cruise, and the entire Saturn tour. Data

for this data set are acquired from the RPWS Low Frequency

Receiver (LFR), Medium Frequency Receiver (MFR), Medium Frequency

Digital Receiver (MFDR) (which can be used to replace MFR band 2

data), High Frequency Receiver (HFR), Sounder, and Langmuir Probe

(LP). Data are decompressed and internal receiver minipackets are

unsegmented. This data set is intended to preserve the telemetry

data and is to be used only as a last resort. Other RPWS archived

data sets are designed to be complete and more easily used.

Browse data sets associated with the other data sets provide a

graphical search of the data included in this data set. This data

set should be the last used by a user of any of the RPWS archive

as it is in the least user-friendly form."

CITATION_DESC = "Kurth, W.S., W.T. Robison, and L.J.

Granroth, CASSINI V/E/J/S/SS RPWS RAW COMPLETE TLM PACKETS V1.0,

CO-V/E/J/S/SS-RPWS-3-REFDR-ALL-V1.0, NASA Planetary Data System,

2004."

DATA_SET_DESC = "

Data Set Overview

=================

The Cassini Radio and Plasma Wave Science (RPWS) raw complete data

set includes all RPWS telemetry data for the entire Cassini mission.

This data set includes raw telemetry values for each frequency

channel for each sensor for all times during the mission including

the two Venus flybys, the Earth flyby, the Jupiter flyby,

interplanetary cruise, and the entire Saturn tour. Data for this

data set are acquired from the RPWS Low Frequency Receiver (LFR),

Medium Frequency Receiver (MFR), Medium Frequency Digital Receiver

(MFDR) (which can be used to replace MFR band 2 data), High

Frequency Receiver (HFR), Sounder, and Langmuir Probe (LP). Data

are decompressed and internal receiver minipackets are unsegmented.

This data set is intended to preserve the telemetry data and is to

be used only as a last resort. Other RPWS archived data sets are

designed to be complete and more easily used. Browse data sets

associated with the other data sets provide a graphical search of

the data included in this data set. This data set should be the

last used by a user of any of the RPWS archive as it is in the least

user-friendly form.

Parameters

==========

This data set includes all measurements from each sensor, frequency

channel, and time step for which data were acquired by the RPWS.

Processing

==========

Data in this data set were processed by the use of a number of

software programs which assemble segmented mini-packets in the raw

telemetry packets into complete sets and de-compress the data that

were compressed by one of a number of compression algorithms by the

RPWS flight software onboard. Information included in the Software

Users Guide included in the DOCUMENT directory on this volume

provides information necessary to extract and use these data.

Data

====

The data included in this data set are the complete set of RPWS

telemetry.

Ancillary Data

==============

Ancillary data included with this data set collection include a

series of files that describe the modes of the RPWS as a function of

time and provide a time- ordered listing of Instrument Expanded

Block (IEB) trigger commands (the mode by which the RPWS is

reconfigured). Also a detailed description of each of the modes (or

IEBs) is provided.

Other data which are ancillary to this data set but which are

archived separately from this collection are the Navigation and

Ancillary Information Facility's SPICE kernels describing the

position and attitude of Cassini and various solar system bodies as

a function of time.

Coordinate System

=================

The data in this data set are measurements of wave electric and

magnetic fields measured by the RPWS electric and magnetic sensors.

These fields are presented as detected by the sensors and are not

rotated into any other coordinate system. If desired the SPICE

kernels can be used with the SPICE toolkit to convert from the

spacecraft frame to virtually any frame which may be of use in

analyzing these data. However, for many purposes, the wave

amplitudes are extremely useful and may be entirely adequate with no

coordinate transformations at all.

Software

========

No software is provided to be used with this data set.

Media/Format

============

These data are supplied to the Planetary Data System on DVD-R media

using formats and standards of the PDS for such media."

CONFIDENCE_LEVEL_NOTE = "

Confidence Level Overview

=========================

This data set contains all the telemetry data for the Cassini RPWS

instrument for the interval described In the label files for the

individual data files. Every effort has been made to ensure that

all data returned to JPL from the spacecraft are included.

Review

======

The RPWS raw complete data will be reviewed internally by the

Cassini RPWS team prior to release to the PDS. The data set will

also be peer reviewed by the PDS.

Data Coverage and Quality

=========================

All data in the stated interval are included, to the best of our

knowledge and attempts to determine completeness. In general, the

instrument was operated only briefly during early tour for the

following intervals: