PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2018-07-01
NOTE = "AAREADME.TXT describes this volume."
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END
Volume CORPWS_9002
Cassini Orbiter
Radio and Plasma Wave Science
RPWS Standard Products Archive
Entire Mission
Planetary Plasma Interactions Discipline Node
of the
Planetary Data System
========================================================================
Introduction
========================================================================
This volume includes reduced temporal and spectral resolution
spectral information calibrated in units of spectral density for the entire
Cassini mission, submitted to the Planetary Data System (PDS). Every effort
has been made to ensure that the data and documentation are of the best
possible quality. However, mistakes are inevitable. The PPI Node of the
PDS will maintain an online list of ERRATA where errors and updates are
documented. Should any user of this product find an error on this volume,
please report the error to the PPI Node so that the finding can be made
public. All users are encouraged to verify the "correctness" of the data
prior to submitting any publications or other work based on these data.
Users of these data are encouraged to acknowledge both the PDS and the
principal investigators of the instruments whose data are used in analysis
in all publications.
========================================================================
IMPORTANT INFORMATION ABOUT THIS VOLUME-- READ THIS FIRST!
========================================================================
This volume set contains reduced temporal and spectral resolution spectral
information calibrated in units of spectral density from the entire
mission. New data will be added on subsequent volumes as they become
available.
KEY THINGS TO KNOW IN USING DATA ON THIS VOLUME:
A web browser can be used to view all the data on this volume in the form
of Portable Network Graphics (PNG) files which are image files of
frequency-time spectrograms by clicking on "Graphical Data Browser
Index" in AAREADME.HTM in the root directory. The browse data under the
BROWSE directory consist of the "*.PNG" files. Survey plots are
presented along with links to corresponding data files and their PDS
label files.
All data files are stored under the DATA top-level directory and are
organized by data set and spacecraft event time. The DATA directory
branches off into:
* ANCILLARY, containing instrument mode and sequence information
* RPWS_KEY_PARAMETERS, containing the primary key parameters data
The data are stored in text (key parameters) files with labels and format
descriptions included as separate files. PDS labels are contained in
associated "*.LBL" text files in the same directories as the data files and
shared descriptions of many of the data structures are stored in "*.FMT"
files in the LABEL top-level directory.
General information for this volume is provided in PDS catalog files
located in the CATALOG directory. The data set is documented in:
* CO_KEY_DS.CAT, describing RPWS_KEY_PARAMETERS
Other PDS catalog files include:
* CO_INST_HOST.CAT, describing the Cassini Orbiter spacecraft
* CO_MISSION.CAT, describing the Cassini-Huygens mission
* CO_RPWS_PERSON.CAT, listing RPWS and PDS personnel
* CO_REF.CAT, listing useful literature references
* CO_RPWS_INST.CAT, describing the RPWS instrument
=======================================================================
Related PDS Products
=======================================================================
Planned for archive later are higher level data products from the Radio
and Plasma Wave Science investigation including polarization and
direction-finding measurements of planetary radio emissions, electron
density measurements via a number of techniques including the use of a
Langmuir Probe and sounder, and wave-normal analysis results of plasma
waves.
Another related PDS product is the Cassini Magnetosphere and Plasma
Science Key Parameter data set which includes the RPWS Key Parameter
data set included herein along with similar products from the Cassini
Magnetometer, Magnetospheric Imaging Instrument, and Cassini Plasma
Spectrometer Subsystem.
========================================================================
Volume Format Information
========================================================================
The volume is organized into a hierarchical directory structure. The volume
is formatted according to a combination of ISO 9660, UDF, Rock Ridge
(UNIX), and Joliet (Microsoft) standards in order to accommodate users
on a wide variety of platforms. This volume does not contain any
Extended Attribute Records (XAR). Thus, VMS users may have some
problems accessing files on this volume.
========================================================================
File Formats
========================================================================
The data files on this volume are ASCII text and binary files. Browse
data are provided in Portable Network Graphics (PNG) format. All data
files are described by detached PDS labels. A detached label file has
the same name as the data file that it describes, but with the extension
.LBL. For example, the file T1999227_HFR0.DAT is accompanied by the
detached label file T1999227_HFR0.LBL in the same directory. File names
within this archive comply with the "27.3" convention for compliance
with ISO 9660 Level 2 interchange requirements.
All documents, detached PDS labels, and HTML files are stream format
files, with a carriage return (ASCII 13) and a line feed character
(ASCII 10) at the end of the record. This allows the files to be read
by MacOS, DOS, Windows, UNIX, and VMS operating systems. UNIX system
users may see an unnecessary carriage return character (^M) at the end
of each line. Mac users may see an unnecessary line feed character (^J)
at the start of each line.
ASCII tabular data files (.TAB) are formatted so that they may be read
directly into many database management systems (DBMS) or spreadsheet
programs on various computers. All fields are of fixed length and are
separated by white space or commas. Character fields are left
justified, and numeric fields are right justified. 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 normal text file on other computers.
The document, PDS label, and ASCII table files on this volume can be
viewed with a Web browser. Note that to view these files, the browser
may need to be configured to recognize files with extensions of .CAT,
.LBL, and .TAB as text files. Users with Web browsers also can navigate
the disk via the HTML file AAREADME.HTM in the disk's root directory and
the HTML files in the BROWSE directory.
PDS labels are object-oriented. The object to which the label refers
(e.g., SERIES, TABLE, etc.) is denoted by a statement of the form:
^object = location
in which the caret character (^, also called a pointer in this context)
indicates that the object starts at the given location. For an object
in the same file as the label, the location is an integer representing
the starting record number or byte of the object (the first record/byte
in the file is 1). For an object located outside the label file, the
location denotes the name of the file containing the object, along with
the starting record or byte number. For example:
^SPECTRAL_DENSITY_TABLE = ("T1999227_HFR0.DAT", 4)
indicates that the SPECTRAL_DENSITY_TABLE object begins at record 4 of
the file T1999227_HFR0.DAT, in the same directory as the detached label
file. Below is a list of the possible formats that use the ^object
keyword.
^object = n
^object = n❮BYTES❯
^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); default is record
number.
❮BYTES❯ indicates that number given is in units of bytes.
filename upper-case file name.
ext upper-case file extension.
In cases where many files of the same format or structure are present,
the structure description component is detached from the primary label.
This minimizes repeating information which does not vary from file to
file. In these cases, a format file (.FMT) contains the file structure
information and the base label (.LBL) describes the parameters which
generally do vary from file to file (number of records, file name,
start/stop time, etc.). When a format file is used within the PDS label,
the syntax is:
^STRUCTURE = filename
Example:
^STRUCTURE = "LRFULL_TABLE.FMT"
Syntactically, the contents of the format file can be inserted directly
into the base label such that the entire file contents replace the
single line ^STRUCTURE = filename. Note that these shared format files
are collected in the top-level LABEL directory on this volume.
========================================================================
Errata
========================================================================
There is a file called ERRATA.TXT found at the root level of this volume
which contains a list of known deficiencies or caveats associated with
data on this volume at the time it was published.
If you find an error on this volume, please report the error to the PDS
Operator at the PPI Node of the PDS.
Email pds_operator@igpp.ucla.edu
Telephone (310) 206-6073
U.S. Mail PDS Operator
c/o Dr. Raymond Walker
UCLA - IGPP
Los Angeles, CA 90095-1567
Only through support and feedback of the users of these data can an
effective errata list be maintained.
========================================================================
Software
========================================================================
Example code for reading some of the binary data file formats on this
volume are available in the EXTRAS/SOFTWARE directory. This software is
provided "as is" and is distributed as a service to the community.
* LRF_LIST.C generates a text listing of data from binary
RPWS_LOW_RATE_FULL files.
* WBR_WFR_LIST.C reads binary RPWS_WAVEFORM_FULL and
RPWS_WIDEBAND_FULL files and produces a calibrated listing
including status information.
KEY_BROWSE.JAR contains a complete Java application for viewing and
manipulating the key-parameters data. Updates and source code will be
available online and on future volumes.
See the file EXTRAS/SOFTWARE/SOFTINFO.TXT for further information.
========================================================================
Volume Contents and Structure
========================================================================
This section describes the volume structure and naming conventions.
Below is a tree diagram of the volume, followed by a description of the
directory function and key files in each directory.
[CORPWS_9002] (root directory)
|
|- AAREADME.TXT Plain text describing volume contents,
| organization, and use (this file)
|
|- ERRATA.TXT Describes known deficiencies or caveats in the
| data on this volume.
|
|- VOLDESC.CAT High level description of volume contents.
|
|- [BROWSE] Contains browse plots depicting the data.
| |
| |- [ANCILLARY] Ancillary support files.
| |
| |- [RPWS_KEY_PARAMETERS] Plots for this data set.
|
|- [CATALOG] Information on data sets and how they are
| processed and produced, on Cassini spacecraft
| and mission, on RPWS instrument, on cognizant
| personnel, and on references to various
| related documents.
|
|- [DATA] Contains text and binary files of instrument
| | measurements and supporting information
| | constituting the primary archive products.
| |
| |- [ANCILLARY] Ancillary support files.
| |
| |- [RPWS_KEY_PARAMETERS] Data files for this data set.
|
|- [DOCUMENT] Instrument paper, RPWS calibration document,
| RPWS users' guide.
|
|- [EXTRAS] Bonus content not necessarily conforming to
| | PDS archive standards.
| |
| |- [SEQUENCE_INFO] Instrument sequence information.
| |
| |- [SOFTWARE] Example code.
|
|- [INDEX] Volume and cumulative indices of archive
| products.
|
|- [LABEL] Shared format descriptions.
========================================================================
Contacts
========================================================================
The person most directly responsible for the construction and release of
this archive volume is Mr. Steven Joy. He was the PPI Node Data
Administrator at the time this volume was created and understands as much
about the volume structure and data organization as anyone. Other PPI
personnel who may be aware of issues related to this archive volume
include Dr. William Kurth and Dr. Raymond Walker, the PDS/PPI Node
manager.
For questions or problems regarding this volume, please contact the
PDS/PPI operator:
Email pds_operator@igpp.ucla.edu
Telephone (310) 206-6073
U.S. Mail PDS Operator
c/o Dr. Raymond Walker
3845 Slichter Hall
UCLA - IGPP
Los Angeles, CA 90095-1567
For questions regarding PDS Standards or other archive volumes available
from the PDS, please contact PDS Operator at the PDS Central Node (at
JPL):
Email pds_operator@jpl.nasa.gov
U.S. Mail Planetary Data System, PDS Operator
Jet Propulsion Laboratory
Mail Stop 202-101
4800 Oak Grove Dr.
Pasadena, CA 91109-8099
=======================================================================
Disclaimer
=======================================================================
The PDS and the Planetary Plasma Interactions (PPI) Node in particular,
assume no legal liability for errors on this volume. All users are
encouraged to verify the "correctness" of the data prior to submitting
any publications or other work based on these data. Errors on this disk
should be reported back to the PPI Node of the PDS through the ERRATA
reporting procedures described above.
All trademarks are acknowledged as the property of their respective
owners. The producers and publishers of this archive do not endorse any
commercial entities which may be mentioned for clarity.
=======================================================================
Acknowledgements
=======================================================================
These data were collected under the auspices of the Cassini Project.
Donald A. Gurnett was the Radio and Plasma Wave Science Principal
Investigator. The archiving effort at The University of Iowa was
supported by T. Averkamp, L. Granroth, R. Johnson, C. Piker and
W. Robison.
This archiving effort was supported by the Planetary Plasma Interactions
Node of the Planetary Data System. Assistance was provided by S. Joy
and J. Mafi of the University of California, Los Angeles, and by R.
Joyner and S. Adams of the Jet Propulsion Laboratory.
========================================================================
|