Index of /holdings/gio-c-jpa_mag-4-rdr-grigg-skjell-v1.0
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aareadme.txt 10-May-2011 09:04 11K
dataset.html 31-Aug-2011 12:13 2.4K
voldesc.cat 09-May-2011 12:49 3.4K [PDS catalog file]
PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2011-05-04
INTERCHANGE_FORMAT = ASCII
NOTE = "ASCII description of contents of GEM Archive"
END_OBJECT = TEXT
END
The present volume contains the combined results from the particle
analyser and magnetometer experiments repackaged as a single-dataset
volume, extracted from the legacy volume described below.
-A.Raugh, 2011-05-04
***** File AAREADME.TXT
This CD-ROM contains data obtained by participants in ESA's Giotto
Extended Mission and assembled for archiving jointly by ESA's GEM
Project and the Small Bodies Node of NASA's Planetary Data System
(PDS). This volume includes spacecraft measurements during the
July 10, 1992 encounter with comet 26P/Grigg-Skjellerup as listed below.
GEM Spacecraft Data CD-ROM Archive
MISSION EXPERIMENT NAMES Data Type Data Content
GEM DUST-IMPACT-DETECTOR table dust impacts
ENERGETIC PARTICLE ANALYZER table particle counts
GIOTTO-RADIO-SCIENCE time series freq, amp residuals
IMS-HIGH-INTENSITY-SPEC table particle flux
JOHNSTONE PLASMA ANALYZER table particle flux
MAGNETOMETER table field comonents
OPTICAL-PROBE-EXPERIMENT table intensities
In addition to the spacecraft measurements, sets of ground based
images, using various filters, have been included in the archive.
A collection of 33 CCD images from 1986 through 1993 were
submitted by H. Boehnhardt and G. Matella while two images on July 25,
1992, just after the encounter, were provided by A. Rotundi.
Supporting files for the Archive user include PDS descriptions, documents,
searchable indices, a mission ephemeris, and software tools (code as well
as IDL procedures). These have been organized into five directories one
level below the root: CATALOG, DOCUMENT, EPHEMRIS, INDEX, and SOFTWARE.
An overview of the GEM mission is provided in the DOCUMENT directory
along with digitized articles from ESA SP-1077, describing the instruments.
(Note that these articles, which were digitized using a convention developed
by the International Halley Watch, are set for fixed width of 132 bytes;
other digitized document or text files follow current PDS guidelines.)
The data directories are signified by an experiment abbreviation (see outline
below) plus the special case when the JPA and MAG data are presented in
merged files which have been resampled in time. A final data directory
(IMAGES) contains the ground-based images submitted as part of the archive.
Structure for GEM CD
AAREADME.TXT (PDS required introduction to the CD-ROM volume)
VOLDESC.CAT (PDS required volume description of the data only)
/CATALOG/CATINFO.TXT (list of catalog files)
*.CAT (Mission, spacecraft, instrument, data, references)
/DOCUMENT/DOCINFO.TXT (list of documents)
/EPHEMRIS/*.TXT (Description of spacecraft attitude, code
and position)
*.TAB (POSITION table for spacecraft and comet)
/GEM/*.DOC (Explanatory description for various data products)
*.TIF (Digitized figures for document files)
*.TXT (Digitized abstracts and introductory article)
/INSTRUME/GIO*.TXT (DID,EPA,GRE,IMS,JPA,MAG,OPE publications)
/INDEX/INDXINFO.TXT (discussion of various index tables)
IMGINDEX.TAB (listing of 35 earth based images)
GEMINDEX.TAB (PDS index for the data contents)
/SOFTWARE/SOFTINFO.TXT (discussion of code, procedures)
/DOC/SWINV.CAT (documentation for catalog)
*.TXT (documentation and code explanation)
/SRC/*.FOR (calculate space vectors and light travel time)
*.PRO (procedures to display IMAGE, TABLE (ASCII AND BINARY)
*.C,*.H,.MAK,.LST (convert PDS label to FITS header)
/DATA Master data directory containing one subdirectory for each
instrument or experiment
/DID/DID*.TAB (ancillary calibration tables)
*.TXT (results in text form)
/EPA/EPACHAN*.TAB (data separated into 4 channels)
/GRE/GRECL.TAB (closed loop results)
GREOL.TAB (open loop results)
/IMAGES/IMAGE*.fit (earth based images - Oct 1986 to Sept 1993)
/IMS/HIS*.FIT (submitted FITS files with data truncation)
HIS*.TAB (reformatted and corrected tables)
/JPA_MAG/JPAMG*.TAB (two variations of data merged with B field)
/JPA/D4D/D*.TXT (4 dimensional source data, full)
/STC/S*.TXT (START/TAC pulse source data)
/TOF/T*.TXT (source data from Time Of Flight)
/MAG/MAGAV*.TAB (MAG data time averaged presented as ASCII tables)
MAGnnn*.DAT (MAG data time averaged presented as BINARY)
MAGnnnnn*.DAT (MAG source data as binary table)
/OPE/OPE*.TAB (tables of counts plus calibration)
The GEM project in consultation with the Small Bodies Node decided that
the data would be archived in the PDS format. Consequently, the layout
of this volume and the labels for each file conform to PDS guidelines.
The components of this data collection, however, are not fully compliant
since they have not been through a formal PDS peer review. The data
suppliers individually address the validity of the data.
We wish to acknowledge the work of each PI for the eight GEM experiment
teams as well as the special efforts of A. Coates, P. Daly, N. McBride,
M. Paetzold, and J. -B. Renard in supplying the relevant data. The GEM
project through the efforts of T. Morley supplied the ephemeris code
and explanatory files. The entire Small Bodies Node staff was
responsible for the development of the software and preparation of the
CDROM archive. The GEM project completed the final production of the
booklet and CDROM. The distribution of the GEM archive is being
handled jointly by both groups.
Small Bodies Node, Planetary Data System
Department of Astronomy, University of Maryland
College Park, MD 20742-2421
pdssbn.astro.umd.edu
02 August 2006
==============
The catalog files and labels on this volume were updated to adhere to
current PDS standards. Note that the data will never be subject to a
full PDS external peer review, and thus will be given a status of
"SAFED" (i.e., save-the-bits) in the PDS catalog.
18 August 2006
==============
Documented errata have been applied to these files.
-Anne Raugh.