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NJPL1I00PDS000000000 FILE_TYPE = TEXT RECORD_TYPE = STREAM END PLANETARY DATA SYSTEM INTERACTIVE DATA INTERCHANGE 1986 SCIENCE SAMPLER DISK MIKE MARTIN INTRODUCTION This disk contains data files collected during the Planetary Data System (PDS) Interactive Data Interchange (IDI) Workshop held during the spring and summer of 1986. The workshop was intended to familiarize the planetary science community with some of the electronic communications capabilities becoming available as a result of PDS and NASA network development. A second major goal was to collect a wide variety of user data files so that the PDS designers could better understand the "data architecture" in place at user sites and develop long-term standards for PDS data interchange. The richness of the data files obtained during the workshop has exceeded our expectations. We believe this disk represents a stunning collection of important scientific data files. The experience we have gained through exposure to varied user- specific data files and formats will provide the foundation for building a robust data interchange standard for the mature PDS. The electronic communications side of the workshop was moderately successful. Nearly 100 science and engineering representatives from institutions around the country participated in the exchange of network information and in message exchange on TELEMAIL and SPAN (Space Physics Analysis Network). Many workshop participants have commented on the value of being exposed to a variety of electronic access mechanisms and information resources. The use of electronic networks for data exchange was not very successful, partly due to major reconfigurations performed on the SPAN network while the workshop was being conducted, and partly due to the large size of many of the submitted data files. It seems clear that, at least for the near future, general access networks are best suited for message communication, but not for multi-megabyte data transfers. Nearly all of the larger files on the sampler disk were submitted on magnetic tape. DISCLAIMER This disk has been produced as a TEST. Neither the data descriptions nor the data contents have undergone close scrutiny for errors in translation from user submissions or conversion to CDROM format. In the course of handling this many files it is a certainty that errors will have been made. We apologize to all data submitters in advance for any oversights, but please remember, this is a learning experience. DISK FORMAT ----------- This disk is written in the High Sierra format (5/28/86). This format differs slightly from the one proposed as the ISO standard which is expected to be ratified as an international standard in mid-1987. FILE FORMATS ------------ Nearly all of the data files contained on this disk utilize PDS labels, which are ASCII text "keyword = value" labels containing file format and descriptive information. Any file with the extension "IMG", "CUB", "TAB", "FMT", "LBL", or "PAL" can be safely "typed" (up to the END statement) so that the labels can be viewed. The test software which will be distributed separately to disk users, interprets these labels to provide data display and access functions. Complete documentation for the label and data format architecture can be obtained on the PDS VAX, SPAN node JPLPDS:: in the directory DISK$USER1:[LABULL]. As support software is developed for the label system it will also be available in this directory. See the file "LABELS.TXT" in this directory for a brief description of the label architecture used on files on this disk. SOFTWARE -------- File reader software was submitted by many users, however, since it is unclear exactly what the data interface to the CDROM disk will be, the software has not been included on this disk. It will be available in the CDROM software distribution package after it has been tested. DIRECTORY AND FILE NAME CONVENTIONS ----------------------------------- We have attempted to use the National Space Science Data Center (NSSDC ) Central Online Data Directory (CODD) architecture as a model for our directory organization on this disk. In some cases, closely related data from a single submitter spans organizational boundaries (spectral data, land data system data). In these cases we have maintained the data in special directories for convenience. All data files on this disk are identified by a 12 character name, providing a file content identifier (8 characters), a separator (".") and an extension (3 characters). Most of the file names are formed by abbreviating the name of the data catagory in the file. The mnemnoic is often followed by a sequential count if many similar files occur (GLOB240 - 359, for example). Certain files are identified by the time tag of the observation data in the file. Specifically all Voyager images are in the format "Cnnnnnnn.IMG" where C indicates that the following value is a spacecraft clock count and nnnnnnn represents the flight data subsystem count for the image. There are 5 files in the Jupiter MAGNETOS subdirectory which have this format, but are plasma wave files, not images. The Viking images use a similar format "Fnnnnnn.IMG" where F indicates that the following value is a "FRAME_ID" or picture number. The extensions are assigned as follows: CAT - Special STAR catalog format. CUB - A PDS labelled CUBE file (three dimensional array). DAT - A file which is stored in a USER data format. FIT - A file stored in "FITS" (flexible image transport) format. FMT = A set of PDS labels which identify the format of a data file (used when the descriptive material is too large to insert in each data file). The labels for the file will use a STRUCTURE_POINTER = 'filename.FMT' to point to the format file. LBL - A set of PDS labels which identify and point to a USER data file. IMG - A PDS labelled image file (two dimensional array). MAF - A Mission Analysis File from the Dynamics Explorer photometer instrument. PAL - An image pallette file containing correspondence of color values and red, green and blue intensities. TAB - A PDS labelled ASCII or binary table containing tabular data. DISK CONTENTS ------------- Data files on the disk are stored in 5 major directories: ASTRO - Astronomy Discipline. LAND - Land Science Discipline. OCEAN - Ocean Science Discipline. PLANET - Planetary Science Discipline. SOLTERRA - Solar Terrestrial Discipline. Within each directory files are organized in subdirectories. The ASTRO directory contains star catalog files and an INFRARED directory containing the Infrared Astronomical Satellite (IRAS) point source catalog. The LAND directory contains 3 subdirectories. RADAR - Radar images of Charlevoix, Quebec and Los Angeles. PLDS - Multispectal Analysis of Sedimentary Basins. CARTO - NOAA Elevation averages for continental US. The OCEAN directory contains sample sea surface temperature and chlorophyll concentration image files at the root level, and a single sub-directory GLOBXXX, which contains a series of images which provide a "movie" of the global sea surface temperature over a two week period. The PLANET directory contains subdirectories for SPECTRA, (a collection of tables of geometric albedo for planetary bodies, as well as imaging spectrometer multidimensional cube files); GAZ containing a gazetteer of planetary feature names and locations; and DBF, a collection of DBASE II DBF files documenting the Voyager and Viking images in the planetary bodies subdirectories. The other directories are for major planetary bodies. The COMETS directory contains the Halley Watch data catalog for comet Crommelin. Files are grouped in eight subdirectories, AMATE - Amateur observations. ASTRO - Astrophysics. IRSTU - Infrared Studies. NEARN - Near nucleus. LARGE - Large scale phenomena. PHOTO - Photometry and photopolarimetry. RADIO - Radio studies. SPECT - Spectroscopy. The JUPITER directory contains a file of geometry and event records for the Voyager imaging experiment and the following subdirectories. AMALTHEA - Images of satellite Amalthea. ATMOS - Weather movie of Jupiter's atmosphere. IO - Images of satellite IO. CALLISTO - Images of satellite Callisto. EUROPA - Images of satellite Europa. GANYMEDE - Images of satellite Ganymede. J_RINGS - Images of Jupiter's ring. MAGNETOS - Jupiter Plasma Wave and Magnetometer data files. The MARS directory contains a file of geometry and event records for the Viking Orbiter imaging experiment and the following subdirectories. SURFACE - Mars digital maps and Mars consortium data files. PHOBOS - Close-up images of satellite Phobos. MET - Viking Lander meteorology data files. The MOON directory contains a set of Lunar Consortium images. The SATURN directory contains a file of geometry and event records for the Voyager imaging experiment and the following subdirectories. ATMOS - Images of Saturn's atmosphere. DIONE - Images of satellite Dione. ENCELADU - Images of satellite Enceladus. HYPERION - Images of satellite Hyperion. MIMAS - Images of satellite Mimas. RHEA - Images of satellite Rhea. S_RINGS - Images of Saturn's rings. TETHYS - Images of satellite Tethys. TITAN - Images of satellite Titan. The URANUS directory contains a file of geometry and event records for the Voyager imaging experiment. The VENUS directory is made up of subdirectories GRAVITY which contains Pioneer Venus Orbiter line-of-sight-gravity data; and RADAR which contains an image of Asteria Mons and the Pioneer Venus Orbiter NSSDC radar data catalog. The SOLTERRA directory contains two data files, OMNI.DAT, an interplanetary medium database prepared by NSSDC and SOLAR.TAB which provides solar rotation averages. It also contains the subdirectory MAF, containing photometer measurements from the Dynamics Explorer spacecraft. DATA DESCRIPTIONS. This section provides a brief summary of the data files submitted by participants in the IDI workshop. **************************************************************** **************************************************************** ASTRONOMY DATA SETS - DIRECTORY ASTRO **************************************************************** **************************************************************** STAR CATALOGS ------------- The star catalogs include files collected to support the JPL navigation effort and were provided by the Navigation Ancilliary Informtion Facility team for inclusion on this disk. Brief descriptions of some of the catalogs follow. The Dritter Katalog der Astronomischen Gesellschaft (AGK3) contains 183,145 stars north of about -2.5 degrees declination. Its limiting magnitude is approximately 9.5 visual or 10.5 photographic (the magnitude data in the catalog is photographic only). The positions are for epoch approximately 1959; the proper motions are calculated by comparing the AGK3 positions with those in its predecessor catalog, the AGK2 (epoch 1930). The Smithsonian Astrophysical Observatory Star Catalog (SAO) contains 258,997 stars covering the whole sky. It was compiled in 1962 from a dozen earlier catalogs; no new observations were made for it. Its epoch is typically in the mid 1930's, and its position standard deviations are typically between 1 and 2 arc seconds now. Even so, the SAO remains the best catalog for the southern sky. The U.S. Naval Observatory Zodiacal Catalog (USNO) was compiled by the USNO from the SAO, AGK3, and Perth 70 catalogs. It contains 32,221 stars within 6 degrees 40 minutes of the ecliptic. Its southern hemisphere is derived almost entirely from the SAO and therefore has the same error characteristics as the SAO. Until the USNO releases their updated version sometime in 1986-1987, this catalog is best for regions around the ecliptic (e.g. Galileo satellite tours). One additional file, STARS.TAB presents a table of bright stars, and includes their magnitude and color index. **************************************************************** IRAS POINT SOURCE CATALOG - SUBDIRECTORY IRAS **************************************************************** The Infrared Astronomical Satellite conducted a sensitive and unbiased survey of the sky in four wavelength bands centered at 12, 25, 60, and 100 um. The IRAS point source catalog contains some 250,000 well-confirmed point sources and includes positions, flux densities, uncertainties, associations with known astronomical objects and various cautionary flags for each object. The point source catalog is divided into six individual files, covering the range 0 to 24 hr in right ascension in blocks of four hours each. Files are named IRAS0004.DAT, IRAS0408.DAT, etc indicating the right ascension in each file. Each file contains from 20,000 to 90,000 sources arranged in order of increasing right ascension. **************************************************************** **************************************************************** LAND DATA SETS - DIRECTORY LAND **************************************************************** **************************************************************** **************************************************************** LAND PILOT STUDY AREA - SUBDIRECTORY PLDS **************************************************************** SEDIMENTARY BASINS ------------------ The Deadman Butte area of Wyoming is one of several locations in the Wind River and Bighorn Basins of Wyoming being studied for the NASA Code EEL Multispectral Analysis of Sedimentary Basins Project at JPL (Lang, 1985). The purpose of the study is to develop quantitative models of the formation and evolution of sedimentary basins through stratigraphic, structural, and tectonic analysis of conventional geologic/geophysical and remotely sensed multispectral data. **************************************************************** ELEVATION MAPS - SUBDIRECTORY CARTO **************************************************************** NOAA ELEVATION MAPS ------------------- NOAA 30-second elevation averages were scaled to a range from 0 (sea level, lowest elevation) to 255 (highest elevation) so that each scaled value corresponds to a 15 meter interval. The data are arrayed in four files with the following longitudinal boundaries in degrees west longitude: 125 to 109, 109 to 100, 100 to 86, 86 to 66 degrees. Each file corresponds to a latitude range from 25 to 49 degrees north. Within each file each record corresponds to the northernmost latitude and the first sample in each record corresponds to the westernmost longitude. **************************************************************** RADAR IMAGES - SUBDIRECTORY RADAR **************************************************************** SIR-B RADAR IMAGE ----------------- This is a SIR-B image of an impact crater in the region of Charlevoix, Canada. SEASAT SAR ---------- This is a SEASAT synthetic aperature radar (SAR) image of the Los Angeles area. The Seasat SAR data can be optically and/or digitally processed into imagery. The SAR image is essentially a measure of the radar backscatter (reflectivity) of the target scene. The backscatter depends upon the composition, slope, and roughness-size scale of the surface material. Bright regions (high reflectivity) can be due to roughness on a size scale comparable to the radar wavelength, target inclination toward the SAR or a large dielectric constant, which may be present, for example, in soil with a high moisture content. **************************************************************** **************************************************************** OCEAN DATA SYSTEM - DIRECTORY OCEAN **************************************************************** **************************************************************** This collection presents a variety of images representing sea surface temperature and chlorophyll concentration for the Santa Barbara area, Long Island, Eastern Pacific and Gulf Stream. Temperature data was gathered by the Advanced Very High Resolution Radiometer (AVHRR) on NOAA 7 and chlorophyll data by the the Coastal Zone Color Scanner (CZCS) on NIMBUS 7. Files represent both individual images and monthly mean images of temperature and chlorophyll. A global sequence in subdirectory GLOB provides a global sea surface temperature movie if displayed from file GLOB359 to GLOB240. **************************************************************** **************************************************************** PLANETARY DATA SETS - DIRECTORY PLANET **************************************************************** **************************************************************** **************************************************************** PLANETARY SPECTRA - SUBDIRECTORY SPECTRA **************************************************************** SPECTRA OF THE PLANETS AND SATELLITES ------------------------------------- This directory contains tables of spectra (geometric albedo) at various wavelengths for many planetary bodies. The compiled data lists of spectra of the planets and their satellites comes from many investigators. The specific references to each piece of data can be found in the reference given with each data file. SPECTROMETER FILES - GALILEO NIMS --------------------------------- GANCUB is a synthetically generated 3-dimensional data set (image cube) of the type to be returned by mapping spectrometers such as the NIMS instrument on Galileo. The spatial information (the first two array dimensions) is based on a small section of a Voyager image of Ganymede, taken in the longest wavelength filter (orange, I believe). The third (spectral) dimension consists of one spectrum per spatial pixel. These spectra originated from 25- 30 near-IR laboratory spectra (~0.7 to 2.5 um) of ice, minerals, and ice-mineral mixtures, and were converted to NIMS wavelengths. A small amount of random noise was added to the lab spectra before assignment to each pixel in the image to more closely simulate actual NIMS data, but the net effect is still quite smooth, probably smoother than will be realized with actual spacecraft measurements. The files BOXSCAN.DAT, PARTBOX.DAT and ZIGZAG.DAT are three "tube" files. These represent data collected by Hugh Kieffer with the NIMS instrument on a mineral target (or "sand painting") created by him from materials provided by Roger Clark. **************************************************************** PLANETARY GAZETTEER - SUBDIRECTORY GAZ **************************************************************** This volume, a gazetteer of names of surface features on planets and satellites, and of planet, satellite and ring nomenclature, is the first in a planned annual series of computer-stored and computer-manipulated lists of planetary nomenclature. An illustrated formal version is slated to be published in about a year and republished every six years, after alternate triennial meetings of the General Assembly of the International Astronomical Union (IAU). Informal versions will be updated and open-filed annually. This volume lists more than 4000 names; nearly 600 were added at the November 1985 General Assembly in New Delhi, India. As is true of terrestrial nomenclature, a systematic planetary nomenclature is essential for anyone wishing to identify, describe, locate, or discuss planetary surface features and processes. For these same reasons, names are applied to prominent features when a planetary surface is first imaged; later, many names are added at the request of investigators who are mapping or describing specific surfaces or features. The present volume contains the names of topographic features or distinctive bright or dark features on planets and satellites, and the names of newly discovered small satellites, rings, and ring gaps; later versions will include the names of atmospheric features. **************************************************************** IMAGE SUMMARY FILES - SUBDIRECTORY DBF **************************************************************** These files are DBASE II dbf files documenting the Voyager and Viking images in the MARS, JUPITER and SATURN subdirectories. There are 3 dbf files, VGRIMAGE.DBF (most of the Voyager images), VGRMOVIE.DBF (describing the Voyager Jupiter atmosphere movie sequence), and PHOBOS.DBF for the Viking Phobos images. **************************************************************** PLANETARY SPICE FILES **************************************************************** The SPICE files represent pointing and navigation data for images taken by the Viking orbiter and Voyager spacecraft. They are organized by planet, with file stored in the directories MARS, JUPITER, SATURN AND URANUS. Each file has 3 associated index tables, sorted on SPACECRAFT_CLOCK_COUNT, FRAME_ID (PICNO) and JULIAN_DATE. SUBDIRECTORY COMET **************************************************************** This subdirectory contains 691 data files collected by the International Halley Watch organization in 1984. The Comet Crommelin archive includes a wide variety of data files from different disciplines and instruments. Files are collected in discipline subdirectories, which include amateur observations, astrophysics, infrared studies, near nucleus, large scale phenomena, photometry and photopolarimetry, radio studies and spectroscopy. All files are stored in FITS format, which provides descriptive text labels at the beginning of each file. Two index tables are present, COMET.TAB contains a collection of descriptive parameters for the comet data files, and COMETSUM.TAB provides observation date, file number, file name, data form, observer name and instrument name for each file. **************************************************************** SUBDIRECTORY JUPITER **************************************************************** VOYAGER JUPITER IMAGES ---------------------- This collection contains images taken by the Voyager 1 and 2 spacecrafts during the Jupiter encounter. Included are a movie sequence and selected images of the rings, moons and atmospheres of Jupiter. Images selected for inclusion are those featured in the "Satellites of Jupiter", David Morrison, editor. Images are stored in each of the satellite directories and in the ATMOS directory. Image filenames are "C" followed by the flight data subsystem count for the image and the extension ".IMG". VOYAGER JUPITER PLASMA WAVE DATA - SUBDIRECTORY MAGNETOS -------------------------------- This data set consists of observations made by the Voyager 1 Plasma Wave Instrument. The data are measurements of wave amplitudes as a function of frequency and time in units of electric field (V/m) or electric field spectral density (V^2/m^2Hz). The instrument also includes a wideband waveform channel which provides rapid samples of the electric field over short periods of time which can be Fourier transformed to provide high resolution frequency-time spectograms. VOYAGER MAGNETOMETER DATA - SUBDIRECTORY MAGNETOS ------------------------- A magnetometer is a direct sensing instrument that measures astronomical magnetic fields. the most common type is the flux- gate magnetometer. This is the type of magnetometer used on Voyagers 1 and 2. Magnetometers can provide precise and accurate measurments of magnetic fields in the outer solar system and possibly also in the interstellar medium. Other objectives may be to study the interactions of the solar wind with planetary fields or ionospheres, to investigate the interactions of satellites with planetary fields and with the solar wind in some cases; to search for evidence of internal satellite fields whn near-encounters with satellites are achieved; and to study the large-scale structure of the interplanetary magnetic field. Magnetometers also are used to study hydromagnetic wave phenomena in magnetospheres and solar wind. The Voyager fluxgate magnetometers provide vector field measurements. The enclosed data is a time series (1.92 second averages) of the three components of the field in spherical jovigraphic coordinates and the field magnitude. Bx is the radial component, By is the theta component and Bz is the phi component. **************************************************************** SUBDIRECTORY MARS **************************************************************** MARS DRAGON IMAGES - SUBDIRECTORY SURFACE ------------------ This is a digital image of the 1:15,000,000 geologic map of Mars, by David H. Scott and Michael H. Carr, produced as U.S.G.S. map I-1083. The image is in sinusoidal projection, with 1/4 degree latitude resolution and 1/4 degree longitude resolution at the equator. The colors are similar to those of the original published map. The "life on Mars" feature was the creation of Kay Edwards, who is also responsible for the digital cartographic system used to produce the geologic image. The image contains 721 lines of 1,440 samples. Four image files are included on this disk. In the first file, DRAGGEO.IMG, the data numbers represent the geologic units. The other three files (DRAGBLU.IMG, DRAGGRN.IMG, DRAGRED.IMG) are the blue, green and red images which would yield the colors of the original map. The file DRAGON.PAL contains the correspondence between the DN values in DRAGON.GEO and geologic symbols, as well as the color stretch tables used to produce the color separation images. DRAGON.TAB file also includes the percent areal coverage of Mars of each of the geologic units, prior to emergence of the dragon. MARS GEOLOGICAL MAP - SUBDIRECTORY SURFACE ------------------- This optical-disk version of the map of the western equatorial region of Mars portrays the geologic units only, which were digitized by the U.S. Geological Survey. It does not indicate surface coordinates, structures, topographic features, and correlation of map units that are shown on the published version. Map coordinates are given in degrees; longitudes are west of the prime meridian. This version of the map and text were not reviewed for conformity to U.S.G.S. standands; this work is not an official publication of the U.S.G.S. This map of the western equatorial region of Mars supersedes previous geologic maps based on Mariner 9 data. It represents a more advanced study of the geology afforded by the higher resolution, better quality, and nearly complete coverage of the Viking Orbiter images. The map is the first of three in a series planned to cover the entire planet, portraying its lithology, stratigraphy, and structure. The text describes the major tectonic, volcanic, and fluvial episodes that have contributed to Mars' evolutionary history. The base used for compilation reflects improved imagery and photogrammetry and updated nomenclature. ANTOINADI MAP - SUBDIRECTORY SURFACE. ------------- This is a digital map of the Antoinadi region of Mars. The map covers the region 20 to 30 degrees north latitude and 295 to 305 degrees west longitude. Each pixel represents 1/256 of a degree. Produced by the US Geological Survey, Flagstaff, Az. MARS PHOBOS IMAGES - SUBDIRECTORY PHOBOS ------------------ This collection represents 25 images taken by the Viking Orbiter spacecraft of Mars' larger moon, Phobos. Sets of consecutive images can be mosaiced together to produce a high resolution image. MARS CONSORTIUM DATA FILES - SUBDIRECTORY MCON -------------------------- This directory contains 11 Mars Consortium images. Each image presents a different characteristic of Mars as follows: geology, volcanic units, eolian feature types, wind streaks, channels, eolian directions with grid, topography, 20-micron temperature residuals, thermal inertia, gravity and broad band albedo, VIKING LANDER METEOROLOGY - SUBDIRECTORY MET ------------------------- These files contain summary pressure data from the Viking Landed Meteorology Experiment through out the mission. These data, also available in graphical form on a video disk, consist of statistical functions and supporting measurements presented on a sol by sol basis for Viking Lander 1, the Thomas Mutch Memorial Station, and Viking Lander 2 for the complete mission. On a typical sol, pressure is periodically sampled with intervals between samples of 30 to 90 minutes. The results are presented in the form of averages of functions over a sol as well as supporting information. **************************************************************** SUBDIRECTORY MOON **************************************************************** These 18 datasets represent many of the lunar non-imaging remote sensing datasets which were placed into a common digital array format as part of the Lunar Consortium. Missing are the fields/particles and longwave datasets which are not presently available at JPL. Datasets contained herein are in simple cyclindrical projection unless otherwise stated. Datasets are binary, and consist of 1440 byte records. Most consist of 521 records. Pixels are 1/4 degree by 1/4 degree in extent. Every fourth pixel starts at a whole number longitude or a whole number latitude. **************************************************************** SUBDIRECTORY SATURN **************************************************************** VOYAGER SATURN IMAGES --------------------- This collection contains images taken by the Voyager 1 and 2 spacecrafts during the Saturn encounters. Included are selected images of the rings, moons and atmosphere of Saturn. Images are stored in each of the satellite directories and in the ATMOS directory. Image filenames are "C" followed by the flight data subsystem count for the image and the extension ".IMG". VOYAGER PPS RINGS DATASET - SUBDIRECTORY S_RINGS ------------------------- The PPS60KM.TAB and PPS10KM.TAB files contain data obtained from the Voyager 2 Photopolarimeter Spectrometer (PPS) instrument while observing the occultation of the star Delta Scorpii by the Saturn ring system. A detailed explanation of the observation and data manipulation is contained in the November 1, 1983 issue of the Journal of Geophysical Research, Volume 88, Number A11, pages 8643-8649, by L.W. Esposito, M. O'Callaghan, K.E. Simmons, C.W. Hord, R.A. West, A.L. Lane, R.B. Phomphrey, D.L. Coffeen and M. Sato. The paper, entitled "Voyager Photopolarimeter Stellar Occultation of Saturn's Rings", presents the sixty kilometer binned data given in the PPS60KM.TAB segment. PPS10KM.TAB contains similarly binned data with an approximate resolution of 10 km. **************************************************************** SUBDIRECTORY VENUS **************************************************************** PIONEER VENUS ORBITER LINE-OF-SIGHT OBSERVATIONS - GRAVITY ------------------------------------------------ The PVO gravity data set is a database of line-of-sight observations stored in two files. One file "LOSGDIR.DAT" is a directory file. Each record in this file contains summary information for a particular PVO orbit number as well as pointers to where data for that particular orbit may be found in the data file. The second file, "LOSGDAT.DAT" contains individual data points for each orbit, including lat, lon, accelleration and altitude. More information concerning the format of these two files can be found in a document file, "LOSG.TXT". PIONEER VENUS ORBITER RADAR MAPPER - RADAR ---------------------------------- This data set contains the low-frequency NSSDC database generated from the Pioneer Venus radar mapper experiment. VENUS - ASTERIA MONS IMAGE - RADAR -------------------------- This is a radar image of Asteria Mons. **************************************************************** **************************************************************** SOLAR TERRESTRIAL DATA SETS - DIRECTORY SOLTERRA **************************************************************** **************************************************************** INTERPLANETARY MEDIUM DATABASE (OMNI) ------------------------------------- The first NSSDC data set to be brought to an online accessibility status is the hourly resolution interplanetary magnetic field and plasma compilation. This data set comes from the 1963-1985 "omnitape" which has been used in the generation of the Interplanetary Medium Data Books and Supplements at NSSDC. Information and software related to the OMNI data set can be accessed via the NSSDC guest account ("SET HOST NSSDC", Username: NSSDC) on the SPAN network. This dataset contains hourly interplanetary magnetic field (IMF) data (in GSE and GSM components),interplanetary plasma parameters, and geomagnetic and sunspot indices. Data were collected by IMP, AIMP, HEOS, VELA, OGO, ISEE spacecraft. SOLAR ROTATION AVERAGES OF THE CLIMAX NEUTRON MONITOR ----------------------------------------------------- This data file contains Bartels solar rotation averages of the Climax Neutron Monitor, University of Chicago. For each solar rotation the dataset contains a) the center of the rotation, in floating point years and b) the counting rate, expressed in percent of the 1954 solar minumum level. This data is also available through the World Data Center. **************************************************************** SUBDIRECTORY MAF **************************************************************** DYNAMICS EXPLORER PHOTOMETER - MISSION ANALYSIS FILE ---------------------------------------------------- The NASA/GSFC spacecraft Dynamics Explorer 1 (DE-1) was launched on August 3, 1981, into a 23,280 km. by 570 km. altitude eliptic polar orbit. Its mission along with its low-altitude sister, Dynamics Explorer 2, was to study space plasmas and their interaction with the Earth's ionosphere and atmosphere. Among the instruments onboard DE-1 is a set of three sensitive photometers designed and build at the University of Iowa. This instrumentation has provided unique, truly global views of the Earth's two auroral zones, its envelope of exospheric hydrogen, the geocorona, and the distribution of ozone in the upper atmosphere. Two of the photometers were equipped with very narrow-passband filters to observe visible-wavelength emissions (principally 391.4, 557.7, and 630.0 nm). The third photometer used a different photocathode and filters to provide sensitivity to emissions at vacuum-ultraviolet wavelengths (principally Lyman alpha, atomic oxygen lines at 130.4 and 135.6 nm, and the LBH bands of molecular nitrogen between 140 and 170 nm). The filters were mounted on filter wheels selectable via ground command. ACKNOWLEDGEMENTS Preparing this disk has been a lot like writing a book so I'm going to record my acknowledgements as if it was a book. This disk has consumed much of my energy (mostly off the job) for the past 8 months. I want to thank my wife, Jancis and my daughters, Dusty and Kelly for putting up with me. Dan Nakamura did an incredible job of organizing the 1,600 odd (and I mean odd) files received from workshop participants, deciphering their formats and preparing both descriptive labels and a catalog of file formats. Eric Theis and Jacque Speas were also instrumental in collecting and preparing the data files for conversion to disk. Nancy Evans and the members of the Planetary Science Data Steering Group (PSDSG) conceived the workshop. Nancy was largely responsible for getting it moving. I would like to thank Randy Davis, Eric Eliason, Larry Soderblom, Hugh Kieffer and Bob Mehlman for their efforts to build a logical set of data descriptive and data format standards. Nearly every file on this disk is identified and described using the "PDS Labels" which have been developed over the past 22 months by this group. Ed Greenberg, Fred Billingsley and John Johnson have also supported the development of the data format and interchange standards which are reflected in the label architecture. My thanks also to the individuals who contributed (sometimes with great effort on their part) data files for the disk. I will note the names (in no particular order) in case any have been inadvertantly omitted from the data file documentation. Venus radar Peter Ford, MIT. Spectra Roger Clark, USGS, Denver. Solar Roger Pyle, Univ of Chicago. Magnetometer Ray Walker, Stephen Cox, Lois Kuczynski, UCLA; Bill Smythe, JPL Photometer Kent Ackerson, Rae Dvorsky, Univ. of Iowa. Phobos images Tom Duxbury, JPL. Mars maps,etc Hugh Kieffer, Kay Edwards, USGS Flagstaff. Gazetteer Robert Gurule, USGS, Flagstaff. Saturn images Nancy Evans, Cal Tech. OMNI database Joe King, Susan Kayser, NSSDC. Topographic data Ray Arvidson, Washington Univ. Plasma wave data Bill Kurth, Larry Granroth, Univ of Iowa. Venus gravity Bruce Bills, Brian Fessler, LPI. Saturn PPS data Karen Simmons, LASP, Univ of Colorado. Spectral cubes Bob Mehlman, UCLA. Ring images, gaz Jude Diner, Lonne Lane JPL. Land data system Earnie Paylor, JPL. Ocean data system Phil Zion, Chuck Klose, JPL. Mars map Ray Batson, USGS, Steve Saunders, JPL. SIR-B Radar image Leslie Pieri, Susan Yewell, JPL. Planetary images Sue LaVoie, Carol Stanley, JPL. Jupiter movie Andy Collins, IPL staff,JPL, Gary Hunt, Peter Muller, Imperial College Seasat image John Curlander, Amy Pang, JPL. IRAS catalogs Ted Sesplaukis, Cal Tech. Star catalogs Chuck Acton, JPL. Comet data Mike Aronssen, JPL. Comet data Ed Grayzeck, Goddard. Meteorology Jim TIllman, Univ. of Washington. Spice files Kay Edwards, Debbie Cook, USGS. Lunar consortium Pam Clark, JPL. Planetary albedos John Neff, Univ of Iowa. Stars.tab Richard Berry, Astronomy Magazine. The following individuals indicated on the IDI response form a desire to submit data for the CDROM disk. We spent nearly a month attempting to track down all potential data submitters, but in some cases were unable to reach the individuals, or work out the details for data transfer. If any of the following were inadvertently missed in the collection process, my sincere apologies. They will have top priority on our IDI 1987 disk. Paul Butterworth, Philip Christiansen, Merton Davies, Richard Elphic, Ronald Lepping, Lucy-Ann McFadden, Carle Pieters, William Sjogren, Peter Wehinger, S. Zisk.