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MESSENGER
Energetic Particle and Plasma Spectrometer Calibrated and Derived Data
MESEPPSDDR1
Prepared for the Planetary Plasma Interactions Node of the Planetary
Data System
========================================================================
Introduction
========================================================================
This volume contains part of the original data from the MESSENGER Energetic
Particle and Plasma Spectrometer (EPPS) derived data volume set.
Note that the EPPS is made up of two instrument subsystems, the Fast
Imaging Plasma Spectrometer (FIPS), and the Energetic Particle
Spectrometer (EPS). This volume includes only the Energetic Particle
Spectrometer (EPS) instrument data. Two data sets were delivered within
the original data volume, the FIPS and the EPS.
This volume is intended for the use of scientists and students in the
study of the of the planet Mercury. The data may be used for research
and publication.
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Volume Format
========================================================================
The volume is organized into a hierarchical directory structure. It is
transferred from the MESSENGER SOC to the Planetary Plasma Interactions
Node via the TCP/IP File Transfer Protocol (FTP) and thus the physical
characteristics of the final storage media are unknown to the SOC.
All science data are located under the DATA directory. The INDEX
directory contains a listing of all of the data products included on
this volume. The CATALOG directory contains PDS
documentation describing the instrument and data set. These include:
MESS_EPPS_INST.CAT EPPS instrument description
MESS_EPPSEPS_DDR_DS.CAT EPPS EPS derived data set description
Additional information on volume organization is given in the DDR SIS
on the DOCUMENT directory.
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File Formats
========================================================================
The data files on this volume are provided in ASCII text format
(extension .TAB). Each data file is also accompanied by a detached PDS
label file (extension .LBL), an ASCII file containing information
describing the data file and data record format.
Catalog files (extension .CAT) are provided in ASCII format.
Document files describing the volume and the data are included in the
DOCUMENT volume. Refer to the AAREADME.TXT file on that volume.
Text files and detached label files contain 80-byte fixed-length ASCII
records, with a carriage-return character (ASCII 13) in the 79th byte
and a line-feed character (ASCII 10) in the 80th byte. This format
allows the files to be read by MacOS, DOS, UNIX and VMS operating
systems. Note that while both label and catalog files are ASCII, some
operating systems will not recognize the .LBL and .CAT extensions as
ASCII types. It may be necessary to either remap these extensions as
ASCII in the system or text browser, or else to open the files from
within the text browser.
========================================================================
Volume Contents
========================================================================
Directory Structure and Contents for EPPS DDR Data Archive Volume
The following illustration shows the directory structure overview for
the EPPS DDR Data Archive Volume. This volume contains the EPPS EPS DDR data
products and any additional files required for the volume to be compliant
with PDS standards. The content of the volume is expected to be updated
with periodic releases according to the schedule found in the MESSENGER
Data Management and Archiving Plan (DMAP). Revised DDRs (if needed) will
also be delivered according to the same schedule. Revised DDRs will have
an incremented version number in the PDS label.
Data Volume Directory Structure Overview
MESSEPPSDDR1 ❮ROOT❯
_________________________________|________________________________________
| | | | | |
❮DATA❯ ❮LABEL❯ ❮INDEX❯ ❮LABEL❯ ❮DOCUMENT❯ ❮BROWSE❯
|
|___________________________________
| |
❮EPS_PA_VALUES❯ ❮EPS_PA_DAILY_SPECTROGRAM❯
| |
_____|_____________ ______|____________
| | | | | |
❮2008❯ ❮2009❯ ❮2010❯ ... ❮2011❯ ❮2012❯ ❮2013❯ ...
|
___|___________
| | |
❮JAN❯ ❮FEB❯ ❮MAR❯ ...
Directory Contents:
MESSEPPSDDR1 ❮ROOT❯ Directory
This is the top-level directory of the data volume. The following are
files contained in the root directory.
AAREADME.TXT: (This file) General information file. Provides users with
information about the MESSENGER EPPS data products. Directs user to
other documents on the volume containing more detailed information.
VOLDESC.CAT: PDS file containing the VOLUME object. This gives a high
level description of the contents of the volume. Information includes:
production date, producer name and institution, volume ID, etc.
ERRATA.TXT: Text file for identifying and describing errors and/or
anomalies found in the current volume, and possibly previous volumes of
a set. Any known errors for the associated volume will be documented in
this file. This includes revised CDRs and DDRs meant to replace CDRs
and DDRs in a previous PDS delivery.
CHECKSUMS.TXT: Contains MD5 checksums for the entire volume.
❮DATA❯ Directory
This top level directory contains the subdirectories
corresponding to the standard data products (described in the EPPS
DDR SIS). The directories are further subdivided into YEAR and MONTH
directories.
❮LABEL❯ Directory
This subdirectory contains the "label fragments" (i.e., the *.FMT files)
for all data products on the volume. These format files describe the
table and data objects which store the data.
❮BROWSE❯ Directory
This top level directory contains spectrogram browse products.
❮INDEX❯ Directory
This subdirectory contains the indices for the EPPS CDR and DDR data
products. The following files are contained in the index subdirectory.
INDXINFO.TXT - Identifies and describes the function of each file in
the index subdirectory. This includes a description of the structure and
contents of each index table in the subdirectory AND usage notes.
INDEX.TAB - The index file is organized as a table; there is one
entry for each of the data files included in the two EPPS data sets; the
columns contain parameters that describe the data as well as instrument
and spacecraft parameters.
INDEX.LBL - Detached PDS label for INDEX.TAB.
========================================================================
Related PDS Products
========================================================================
========================================================================
Errata
========================================================================
Every effort has been made to ensure that the data and documentation are
of the best possible quality. However, mistakes are inevitable. The
Planetary Plasma Interactions (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.
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 at the address or numbers listed
under contacts below.
========================================================================
Contacts
========================================================================
For questions concerning these data products and documentation, contact:
Planetary Plasma Interactions Node
UNIVERSITY OF CALIFORNIA, LOS ANGELES
INST. OF GEOPHYSICS AND PLANETARY PHYSICS
6707 GEOLOGY
LOS ANGELES, CA 90095-1567 USA
(310) 206-6073
WWW Site: http://pds-ppi.igpp.ucla.edu
Email address: pds_operator@igpp.ucla.edu
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
Telephone (818) 354-4321
U.S. Mail Planetary Data System, PDS Operator
Jet Propulsion Laboratory
Mail Stop 202-101
4800 Oak Grove Dr.
Pasadena, CA 91109-8099
A list of personnel in the MESSENGER EPPS team that were involved in the
production of this volume is given in /CATALOG/MESS_PERSON.CAT.
The PDS, and the Planetary Plasma Interactions Node in particular,
assume no legal liability for errors on this disk. 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
volume should be reported back to the PPI Node of the PDS through the
ERRATA reporting procedures described above.
|