***** File VOLINFO.TXT Comet Halley Archive User's Guide to IHW CD-ROM Volumes 25-26 Contents 1. Background and Scope of Compact Disk 2. Data Products on these Disks 3. Supplemental Directories 4. File Conventions 5. PDS-FITS Comparison 6. Accessing the Disk 7. References 1. BACKGROUND AND SCOPE OF COMPACT DISK This compact disk (CD-ROM), and the series of disks of which it is a part, contains observations of comet P/Halley obtained during the 1985-1986 apparition. The resulting digital archive is the main product of the International Halley Watch (IHW), which was formed in 1981 to mount an international campaign to observe the comet over a long baseline in time. The collection of remote (mostly ground-based) data archived spans a wide wavelength range and is augmented (volumes 25-26) by measurements made in situ by the spacecraft which encountered the comet in 1986 March. These spacecraft data were shipped to the Small Bodies Node (SBN) of the Planetary Data System which eventually archived the information. The complete IHW digital archive is comprised of four subsets of CD-ROMs containing: o Compressed Halley images from the L-SP Discipline (Volumes 1-18), o Halley data from all IHW Disciplines (Volumes 19-23), o IHW "Trial Run" of comets P/Crommelin & P/Giacobini-Zinner (Volume 24), o Halley and Giacobini-Zinner spacecraft data (Volumes 25-26) The total collection for Halley's Comet contains more than 40,000 independent files and 15 Gbytes of data. This document is intended as a guide to volumes 25-26. 2. DATA PRODUCTS ON THESE DISKS A large number of scientists submitted data to this archive project. In the case of the spacecraft data, those missions/experiments for which data was contributed, sometimes from differing groups, is organized below. Space Data Submitted for Archive EXPERIMENT NAME (ABBREVIATIONS) SUBMIT INSTITUTE CONTACT GIOTTO DUST IMPACT DETECTOR (DID) U CANTEBURY S.GREEN GIOTTO RADIO SCIENCE (GRE,GRS) RADIO INST U BONN M.BIRD HALLEY MULTICOLOR CAMERA (HMC) MPI AERONOMIE U. KELLER IMS HIGH ENERGY RANGE SPEC (IMS/HERS) NASA/JPL B.GOLDSTEIN IMS HIGH INTENSITY SPEC (IMS/HIS) PHYS INST U BERN K. ALTWEGG JPA MERGE (JPA/FIS, JPA/IIS) MULLARD SPAC SCI LAB A. COATES MAGNETOMETER (MAG) U KOLN INST GEO METEOR K.GLASSMEIER OPTICAL PROBE EXPERIMENT (OPE) U FLORIDA SPAC AST LAB A.WEISENBERGER PARTICLE IMPACT ANALYSER (PIA) MPI KERNPHYSIK J.KISSEL SAKIGAKE INTERPLANETARY MAGNETIC FIELD (IMF) INST SPAC ASTRON SCI K.OYAMA SOLAR WIND (SOW) INST SPAC ASTRON SCI K.OYAMA SUISEI ENERGY SPECTRUM PARTICLES (ESP) INST SPAC ASTRON SCI K.OYAMA VEGA1 DUST PARTICLE COUNT MASS ANAL (DUCMA) U CHICAGO G.DENOFLO INFRARED SPECTROMETER - IMAGING (IKS) IKI A.DYACHKOV INFRARED SPECTROMETER - SPECTRA (IKS) IHW/IRSN R.KNACKE PLASMA ENERGY ANALYSER (PM-1,PLASMAG) KFKI K.SZEGO DUST MASS SPECTROMETER (PUMA) IKI A.DYACHKOV DUST MASS SPECTROMETER (PUMA) MPI KERNPHYSIK J.KISSEL DUST PARTICLE PLASMA DET (SP-1) IKI A.DYACHKOV DUST PARTICLE DETECTOR (SP-2) IKI A.DYACHKOV ENERGETIC PARTICLE ANAL (TN-M,TUNDE) IKI K. SZEGO TELEVISION SYSTEM (TVS) IKI A.DYACHKOV TELEVISION SYSTEM (TVS) KFKI K.SZEGO VEGA2 DUST PARTICLE COUNT MASS ANAL (DUCMA) U CHICAGO G.DENOFLO PLASMA ENERGY ANALYSER (PM-1,PLASMAG) KFKI K.SZEGO DUST MASS SPECTROMETER (PUMA) IKI A.DYACHKOV DUST MASS SPECTROMETER (PUMA) MPI KERNPHYSIK J.KISSEL DUST PARTICLE PLASMA DET (SP-1) IKI A.DYACHKOV DUST PARTICLE DETECTOR (SP-2) IKI A.DYACHKOV TELEVISION SYSTEM (TVS) IKI A.DYACHKOV TELEVISION SYSTEM (TVS) KFKI K.SZEGO TELEVISION SYSTEM (TVS) INST KOSMOFORSCHUNG D.MOHLMANN ICE ENERGETIC PARTICLE ANISOTROPY (EPAS) IMPERIAL COLLEGE LONDON I.RICHARDSON MAGNETOMETER (MAG) NASA/JPL J.WOLF PLASMA WAVE ELECT FIELD (PLAWAV) TRW E.GREENSTADT PLASMA WAVE MAGNET FIELD (PLAWAV) TRW E.GREENSTADT RADIO WAVE (RADWAV) MEUDON J.-L.STEINBERG SOLAR WIND PLASMA (SWPLAS) DOE/LANL J.GOSLING In each case a unique data_set_id has been assigned to the data submission as indicated in the Appendix A. A glossary of institutions listed above can be found in Appendix B. In some cases, there were multiple submissions for the same experiment but with a different presentation of the data sent to the IHW-Lead Center; these data were archived by SBN only if the submission was determined to be a unique representation of the data. In three cases (Mischa data for Vega 1 and 2, TKS and APV-N data for Vega 2), it was determined that the submitted data was not properly documented and these submissions were held back for a future addenda CD-ROM. The spacecraft data, usually in directories by mission and experiment, are then arranged in a chronological order. The subdirectory names use abbreviations or acronyms for mission/experiment/instrument. In one case, the acronym has been shortened by dropping an intervening "dash", PM-1 (also PLASMAG-1) and TN-M to TNM. When multiple submissions are archived, the data from the original submitting institution carries a directory name for the experiment, while further submissions have the institution acronym designated in the directory. If further editing or reformatting was done by others, such as the IHW or SBN, the filename reflects information about organization of the data such as for the PIA data from MPI, MODaPIA where the a stands for the class. In most cases, binary table data has been reformatted into ASCII tables. For FITS files which contain ASCII tables, the data has been duplicated as a flat ASCII table as well as kept in its original form. For the IKS submission from IKI and IRSN, the data presented in an uncommon FITS form has been replaced by tabular data with corresponding PDS labels drawn from translating the original FITS headers. In the case of the TVS image data sent by IKI, the FITS header description was not in a convenient form, so the header was recast into a standard 2-dimensional representation. The various GROUP parameters were translated into standard keywords as determined by comparing the overlapping submission of TVS data from KFKI. Data was sent directly to SBN in some cases. For the KFKI submission, unprocessed images outside the original encounter range for both Vega spacecraft were provided. Working with the KFKI, these data were processed by SBN for time and noise corrections in a similar manner to the original submission. FITS headers as well as the PDS labels with full time and processing metadata were supplied in this case. Finally, for the JPA data from the Giotto mission, the data was submitted in a derived form that was "merged" with other relevant data. In a specific case, the original file, called GIOMERGE, was provided by the IMS/HERS team member, M. Neugebauer. Permission to include this form of the data was secured from her and other experimenters (F. Neubauer and H. Reme) whose MAG and RPA measurements had been included. More discussion of each data set is given in *.DOC files located with each data directory 3. SUPPLEMENTAL DIRECTORIES The volume and directory structure of this disk conform to the Level-1 standard specified by the ISO. This format is widely accepted and used on a variety of machines. The AAREADME.TXT file in the root directory introduces the user to the extent of the archive and some contents of the individual subdirectories. There are directories (DOCUMENT and subdirectories, INDEX , SOFTWARE) on each disk which have additional files. The DOCUMENT directory contains text files that give the background to this CD-ROM project, present a general guide to its use, and detail previous experience with CD-ROM products. FITS and PDS formats used specifically for the Halley data (with examples) is located in the subdirectory STDS_IHW (FITS_IHW or PDS_IHW). The file VOLINFO.TXT you are reading describes the space data (it is similar to overviews such as found on volume 23 of the Archive). Documents in the ESA* subdirectories, written by the experiment Principal Investigators, contain specific information on the instruments and preliminary data. (These articles have been digitized by the PDS with permission from ESA.) Other articles such as the SP1 and SP2 descriptions by Balebanov 1986 were digitized by permission of the author, and are included in the ".DOC" files accompanying the data directory. But for some references, such as IEEE Transactions on Geoscience Electronics, GE-16, No 3, 1978, special issue on ISEE (ICE), citations are only given. In the INDEX directory, tables of useful information have been indexed in the PIA and both PUMA subdirectories for the submissions from MPI. The information about images from HMC and TVS (for both Vega missions) are also found in index tables. The SOFTWARE directory contains source code and executables for display of image and spectral data, reading of FITS tables, conversion of metadata, and manipulation of ephemeris information from tracking data. IMDISP.EXE contains various utilities for manipulating visual data on image display devices; IMDISP was originally developed by the Planetary Data System (PDS) at the Jet Propulsion Laboratory (JPL), and has been augmented by IHW. Also provided on these disks is a "FITS Table Browser" called FTB.EXE, which was developed by the Astronomical Data Center (ADC) of the National Space Science Data Center (NSSDC). Several other support programs for manipulating the metadata - FITSUTIL, FITSXTND, FITS2TXT, TXT2FITS - are provided as UTILS. For the ICE spacecraft, a program (EXTRAJ.C) to extract from a "save tape" file parameters for the G-Z encounter is provided along with a "man" page. Finally, ESTEC has supplied Fortran subroutines for calculating the Giotto orbital parameters which are described in "GIOTTO\EPHEMRIS". One of these routines, GIODAT, has been compiled and tested on a UNIX system and is also included separately as GIODAT.FOR file under the "EPHEMRIS" subdirectory along with an explanatory text. On certain disks in the Archive, there is a summary directory that collects information about one of the four subsets. On these same disks there is usually an ERRATA file that lists the latest discrepancies known about the Archive at the time of writing. For the spacecraft data, each disk contains this information. 4. FILE CONVENTIONS The convention for naming files on the IHW CD-ROMs was proposed by the Lead Center and NASA/Goddard Space Flight Center (GSFC) personnel to include a unique data qualifier for the data. Specifically, a set of subnet codes was established to enable identification of the IHW Discipline/subdiscipline from the filename itself. A CD-ROM running number and file extension complete the filename for spacecraft data, e.g., HMC00001.IMG. A list by experiment and listing submitting group names and letter codes is given below. Note that in cases of multiple submissions, the acronym for the submitting group is often used in the filename, e.g., PUMA from IKI is PIKI. There are exceptions for certain experiments such as DUCMA, TVS for the VEGA missions, GRE for Giotto, and PLAWAV, RADWAV, and SWPLAS for ICE. IHW Space Data Filenames MISSION EXP INSTR SUBMITTER CODE FILENAME (OBS_ID RANG) GIOTTO DID DID DIDnnnnn 089001-089006 DSUMMARY 089007 GRE GRE GREaaa 080001-080004 HMC HMC HMCnnnnn 050681-033436 IMS HER IMSHER IMSHERnn 082001-082012 IMS HIS IMSHIS IMSHISnn 066001 JPA FIS/IIS JPAMERG JPAMERGn 076001-077002 MAG MAG MAGnnnnn 081001 OPE OPE OPEnnnnn 083001-083005 PIA PIA PIAMPInn 077001-077041 PIAIDX 077101 SBN MODaPIAn SAKIG IMF IMF IMF00001 000301 SOW SOW SOW00001 000201 SUISEI ESP ESP ESP00001 000101 VEGA1 DUCMA D Daaaaann 010801-010802 IKS IKI IKSIKI IKSIKInn 010901 SBN IKS IKSaaa PM1(PLASMAG) PM1 PM1annnn 010703 PUMA IKI PIKI PIKInnnn 012001-016027 PIKIBINn 016030 MODaBINn MODaFITn PUMA MPI PMPI PMPInnnn 011001-011017 MPI PMPIDXnn 011101 SBN MODaTABn SP1 SP1nnnnn 010704 SP2 SP2nnnnn 010705 TNM(TUNDE) TNM TNMnnnnn 010706 TVS IKI TIKI TIKInnnn 010001-010505 TVS KFKI T Taaaaaaa 010101-020505 KFKI/SBN TPRE TPREnnnn 013001-013061 KFKI/SBN TPOS TPOSnnnn 013062-013246 VEGA2 DUCMA D Daaaaann 020801-020802 PM1(PLASMAG) PM1 PM1annnn 020703 PUMA IKI PIKI PIKIBINn 021201-021202 SBN MODaBINn PUMA MPI PMPI PMPInnnn 021001-021029 MPI PMPI PMPIDXnn 021101 SBN MODaTABn SP1 SP1nnnnn 020704 SP2 SP2nnnnn 020705 TVS IKI TIKI TIKInnnn 020101 TVS KFKI T Taaaaaaa 020301-020604 KFKI/SBN TPRE TPREaaaa 023001-023189 KFKI/SBN TPOS TPOSaaaa 023190-023240 TVS IKF TIKF TIKFnnnn 020901-020904 ICE EPAS EPAS EPyymmdd 097001-097007 EPSUMMRY 097008 MAG MAG MAyymmdd 099001-099005 PLAWAV E E Eddhhaaa 095120-095238 PLAWAV B B Bddhhaaa 095001-095119 RADWAV RW RWyymmdd 096001 SWPLAS SW SWyymmdd 098001-098005 * The symbols in the table are defined as follows: y - year of observation m - month of observation d - day of observation h - hour of observation a - alphanumeric code to keep track of files n - CD-ROM running number to keep track of original files 5. PDS-FITS COMPARISON The International Halley Watch agreed early on in the project that all data would be submitted from the individual groups to the Lead Center using the FITS format. In the case of the spacecraft data, the files came in various forms, i.e., standard FITS, FITS table (ASCII) or for binary data the group extension, ASCII and binary tables as FITS 2-d arrays, and undocumented ASCII or binary files. The submitted FITS files, with contiguous headers and data, were split into separate files. A PDS label was constructed to point at the data part of the file. The original FITS byte stream could then be recovered by concatenating the appropriate header and data files. This method was used throughout the first 24 volumes of the IHW archive and has been followed for the spacecraft data except in certain instances. In the case of FITS tables, it was determined that "flat ASCII tables" with control characters would be most useful, so the FITS byte stream was reformatted and the PDS label points at that new file. (All previous versions of the file are kept for consistency.) Sometimes the FITS files used the group extension to incorrectly describe immages or binary tables. In the former case, the FITS header was corrected and split from the data as mentioned above. In the latter case, the binary data was converted to ASCII tables with control characters with the proper PDS label. In another case the FITS 2-d array representing a binary table was converted to a simple flat ASCII table, while the 2-d array of ASCII values was completely reorganized according to the experiment "mode" and reformatted as a collection of binary arrays with a newly designed PDS label. Finally, undocumented binary and ASCII files were submitted; in the former instance, the data has been reformatted into ASCII for ease of use. In both cases, only a PDS label has been constructed to describe either the original or reformatted file. These PDS labels are metadata (as headers describing data submitted to the archive). There has been no effort to duplicate the documentation contained in the full FITS headers because the PDS and FITS headers for a given data file differ only in the filename extension. Instead we have attempted to use the power of the PDS label syntax to fully describe the data structures and thus gain access to software by that group. The references used to create the PDS labels include the following: SPIDS, Standards for the Preparation and Interchange of Data Sets, Martin, T. Z., et al, Document D-4683, V1.1, 10/3/88; Planetary Data System, Data Preparation Handbook, Volume 2 - Standards, V2.0, JPL D-7669, 5/3/91: and Planetary Data System, Standards Reference, V3.0, JPL D-7669, part 2, 11/20/92. The basic PDS descriptors such as SFDU_LABEL, RECORD_TYPE, RECORD_BYTES, and FILE_RECORDS are explained in these documents. The RECORD_TYPE for all data files is FIXED_LENGTH. The PDS labels have been formed as fixed length (78 byte) plus an embedded CR and LF. On the spacecraft volumes, labels were prepared using PDS V2.0 and V3.0; in the latter case, the keyword PDS_VERSION_ID (= PDS3) identifies the version. There are three PDS objects used for the spacecraft data here: ARRAY (COLLECTION), IMAGE, and TABLE (& TIME_SERIES). We construct a basic PDS label for each data file on the CD-ROM as shown in the table below. Table Showing PDS Objects and FITS Representation PDS OBJECTS/ File Ext COMMENT MISSION CODE (description) NAXIS= EXT GIOTTO DID table .lbl .tab .hdr .tbl .fit 0,2 TABLE GRE table (time series) .lbl .tab 1 HMC image .lbl .img .hdr 2 IMSHERS table .lbl .tab IMSHIS table .lbl .tab .hdr .tbl .fit 0,2 TABLE JPAMERG table .lbl .tab MAG table .lbl .tab OPE table .lbl .tab .hdr .tbl .fit 0,2 TABLE PIA .hdr .tbl 2 .hdr .tbl 2 (INDEX) array, collection .lbl .dat SAKIG IMF table .lbl .tab SOW table .lbl .tab SUISEI ESP table .lbl .tab VEGA1 D table .lbl .tab IKSIKI table .lbl .tab 2 IKS table .lbl .tab 2 PM1 table .lbl .tab PIKI .hdr .dat 2 (SPECTRA) .dat array, collection .lbl .dat array, collection .lbl .dat PMPI .hdr .tbl 2 .hdr .tbl 2 (INDEX) array, collection .lbl .dat SP1 table .lbl .tab SP2 table .lbl .tab TNM table .lbl .tab TIKI image .lbl .img .hdr 2 T image .lbl .img .hdr 2 VEGA2 D table .lbl .tab PM1 table .lbl .tab PIKI .dat array, collection .lbl .dat PMPI .hdr .tbl 2 PMPI .hdr .tbl 2 (INDEX) array, collection .lbl .dat SP1 table .lbl .tab SP2 table .lbl .tab TIKI image .lbl .img .hdr 2 T image .lbl .img .hdr 2 TIKF image .lbl .img .hdr 2 ICE EPAS table .lbl .tab MAG table .lbl .tab E table .lbl .tab B table .lbl .tab RW table .lbl .tab SW table .lbl .tab The file extensions follow suggestions by the Planetary Data System for tabular and image data, and are listed below: .DAT - other binary data .HDR - FITS header records .IMG - image data records .LBL - detached PDS stream format .TAB - table data records In addition, the IHW used a convention to indicate a file submitted as a FITS ASCII table which had been split into a header (.HDR) and table (.TBL) part, where the latter is preserved as an ASCII byte stream in multiples of 2880 byte blocks. In special cases, an ASCII table, which has control characters but does not follow the PDS guidelines for index tables, was given the extension ".IDX". Finally, when a file describes a set of data (.DOC), this is distinguished from when the file outlines the archive or background information (given by .TXT). A. ARRAY (SPECTRUM) The ARRAY object is provided to accomodate arbitraily dimensioned arrays of homgeneous elements. It was introduced as part of the PDS revision v3.0 to describe some of the complex space craft data. The ARRAY object has been used for a broader type of measurement, e.g, a mass spectrum, which did not fit the electromagnetic description provided by the SPECTRUM object. It is composed of keywords to provide a NAME and dimension (AXES) for the array. Keywords AXIS_ITEMS, AXIS_NAME, AXIS_UNIT, AXIS_INTERVAL, START_AXIS are given in vectorial notation. The ARRAY object normally uses the fundamental ELEMENT object to describe the data value. In the IHW cases, it is also combined with the COLLECTION object which allows for an ordered grouping of heterogeneous objects. ( The SPECTRUM object description was refined in v2.0 by working closely with the PDS group to ensure definition of data groups that included both uniformly spaced data (as a single array) as well as ordered groups of observations. From guidelines for dealing with the SPECTRUM data structure, we consider the spectra as tabular data (COLUMN, NAME, DATA_TYPE, START_BYTE, BYTES) which are binary. The independent variable (e.g., WAVELENGTH) is described by the keywords SAMPLING_PARAMETER_NAME, MINIMUM_SAMPLING_PARAMETER, SAMPLING_PARAMETER _INTERVAL, and SAMPLING_PARAMETER_UNIT. There are special cases for Radio or IR data using Doppler VELOCITY, FREQUENCY, or FREQUENCY_OFFSET. For remote data, an effort was made to describe 2-dimensional spectra by working with PDS to establish a SPECTRAL_IMAGE_QUBE object. The data are reduced measurements that have the slit oriented either along the tail or perpendicular to the tail of the comet. To capture this positional information, a vectorial notation was adopted for the SPECTRAL_IMAGE_QUBE that could allow for such observational selection. In cases where the derived units were non-standard, a text DESCRIPTION is embedded in the label. The ARRAY object can now be used to describe 2-dimensional spectra.) B. IMAGE In the case of images, we have included a new keyword describing the byte ordering of the data (MSB_INTEGER) required by FITS. In PDS, images (.IMG, .IMQ, .IBG) are in terms of LINES (FITS keyword NAXIS2) and SAMPLES (FITS keyword NAXIS1), given knowledge of the SAMPLE_BITS (FITS keyword BITPIX), and are easy for the split files. The final form of the label for compressed images is still under active discussion. Unlike previous PDS efforts with compressed images, we chose not to compress the header (or label) and thus have included a keyword to describe the type of compression (ENCODING_TYPE = "PREVIOUS PIXEL") used. The label for compressed images also contains information to permit software to skip over the data if the decoding algorithm is unknown (ITEMS, DATA_TYPE, and ITEM_BITS). We use the label to indicate various subclass structures for the data objects. An example of this is the DIFFERENCE modifier applied to IMAGE, yielding the keyword DIFFERENCE_IMAGE, which indicates that a processing step was applied to the original image. C. TABLE In creating the TABLE descriptions we have found a good correspondence between the FITS and PDS syntax. For tables, the value of NAXIS2= ROWS, TFIELDS=COLUMNS, and NAXIS1=ROW_BYTES; in both cases, the default FORMAT is ASCII. We have attempted to describe the values in each column as a direct translation of the FITS header file; the data itself follows the FITS record format, i.e., ASCII characters with no delimiters and padded to multiples of 2880 bytes. The FITS data structure are currently supported by public domain software that will be distributed with the Archive. In the case of simple ASCII tables, the fixed width format with a closing CR,LF has been preserved. 6. ACCESSING THE DISK These disks have been manufactured following the normal specifications for Compact Disk Read Only Memory (CD-ROM) as well as the logical structure outlined by the International Standards Organization (ISO) in the No. 9660 document. A basic system requirement demands that the CD-ROM reader and software driver support this standard. At this writing, access to the disk will be through most common workstations or computers. The IHW CD-ROMs have been designed to allow maximum access to the data using existing software developed within NASA as well as user-supplied programs. In particular, each data file which was originally supplied in FITS had the headers placed in files (with extension .HDR) separate from the data (.DAT, .IMG, .TBL); each data file is also described by a detached PDS label. The headers have been separated to allow unrestricted access to the data by non-FITS programs. The sizes of all header and data files have been preserved as integer multiples of 2880 bytes (required by FITS) in order to facilitate the reconstruction of the original FITS bytestream by concatenating the data file with the appropriate header file. 7. REFERENCES Martin, T., Martin, M., Braun, M., Johnson, T., Davis, R., and Mehlman, R., SPIDS: Standards for the Preparation and Interchange of Data Sets, JPL D-4683: October 3, 1988. "Information Processing -- Volume and File Structure of CD-ROM for Information Interchange", Reference Number ISO 9660: 1988(E), Developed in coordination with the National Information Standards Organization, National Bureau of Standards, Administration 101, Library E-106, Gaithersburg, MD. Planetary Data System. Data Preparation Workbook, Volume 2, Standards, V2.0, JPL D-7669, May 3, 1991. Planetary Data System, Standards Reference, V3.0, JPL D-7669, part 2, November 20, 1992. Appendix A IHW Spacecraft Data_set_ids PDS ID OTHER NAMES GIO-C-DID-3-RDR-HALLEY-V1.0 DUST-IMPACT-DETECTOR GIO-C-GRE-3-RDR-HALLEY-V1.0 GIOTTO-RADIO-SCIENCE GIO-C-HMC-3-RDR-HALLEY-V1.0 HALLEY-MULTICOLOR-CAMERA GIO-C-IMS-3-RDR-HERS-HALLEY-V1.0 IMS-HIGH-ENERGY-RANGE-SPEC GIO-C-IMS-3-RDR-HIS-HALLEY-V1.0 IMS-HIGH-INTENSITY-SPEC GIO-C-JPA-4-DDR-MERGE-V1.0 JPA-FIS(SWP,HAR)-IIS(4DH)-MAG-MERGE GIO-C-MAG-4-RDR-8SEC-HALLEY-V1.0 MAGNETOMETER-8-SECOND GIO-C-OPE-3-RDR-HALLEY-V1.0 OPTICAL-PROBE-EXPERIMENT GIO-C-PIA-3-RDR-HALLEY-V1.0 PARTICLE-IMPACT-ANALYSER SAKIG-C-IMF-3-RDR-HALLEY-V1.0 INTERPLANETARY MAGNETIC FIELD SAKIG-C-SOW-3-RDR-HALLEY-V1.0 SOLAR WIND SUISEI-C-ESP-3-RDR-HALLEY-V1.0 ENERGY SPECTRUM PARTICLES VEGA1-C-DUCMA-3-RDR-HALLEY-V1.0 DUST PARTICLE COUNTER MASS ANALYSER VEGA1-C-IKS-2-RDR-HALLEY-V1.0 INFRARED SPECTROMETER "IMAGING" CH VEGA1-C-IKS-3-RDR-HALLEY-PROCESSED-V1.0 INFRARED SPECTROMETER HI RES CH VEGA1-C-PM1-2-RDR-HALLEY-V1.0 PLASMA ENERGY ANALYSER(PLASMAG-1) VEGA1-C-PUMA-2-RDR-HALLEY-V1.0 DUST MASS SPECTROMETER VEGA1-C-PUMA-3-RDR-HALLEY-PROCESSED-V1.0 DUST MASS SPECTROMETER - MODAL VEGA1-C-SP1-2-RDR-HALLEY-V1.0 DUST PARTICLE IMPACT PLASMA DETECTOR VEGA2-C-SP2-2-RDR-HALLEY-V1.0 DUST PARTICLE IMPACT DETECTOR VEGA1-C-TNM-2-RDR-HALLEY-V1.0 ENERGETIC PARTICLE ANALYSER(TUNDE) VEGA1-C-TVS-2-RDR-HALLEY-V1.0 TELEVISION SYSTEM VEGA1-C-TVS-3-RDR-HALLEY-PROCESSED-V1.0 TELEVISION SYSTEM VEGA2-C-DUCMA-3-RDR-HALLEY-V1.0 DUST PARTICLE COUNTER MASS ANALYSER VEGA2-C-PM1-2-RDR-HALLEY-V1.0 PLASMA ENERGY ANALYSER(PLASMAG) VEGA2-C-PUMA-2-RDR-HALLEY-V1.0 DUST MASS SPECTROMETER VEGA2-C-PUMA-3-RDR-HALLEY-PROCESSED-V1.0 DUST MASS SPECTROMETER - MODAL VEGA2-C-SP1-2-RDR-HALLEY-V1.0 DUST PARTICLE IMPACT PLASMA DETECTOR VEGA2-C-SP2-2-RDR-HALLEY-V1.0 DUST PARTICLE IMPACT DETECTOR VEGA2-C-TVS-2-RDR-HALLEY-V1.0 TELEVISION SYSTEM VEGA2-C-TVS-3-RDR-HALLEY-PROCESSED-V1.0 TELEVISION SYSTEM VEGA2-C-TVS-5-RDR-HALLEY-TRANSFORM-V1.0 TELEVISION SYSTEM ICE-C-EPAS-3-RDR-GIACOBIN-ZIN-V1.0 ENERGETIC PARTICLE ANISOTROPY ICE-C-MAG-3-RDR-GIACOBIN-ZIN-V1.0 MAGNETOMETER ICE-C-PLAWAV-3-RDR-ESP-GIACOBIN-ZIN-V1.0 PLASMA WAVE ELECT FIELD ICE-C-PLAWAV-3-RDR-MSP-GIACOBIN-ZIN-V1.0 PLASMA WAVE MAGNET FIELD ICE-C-RADWAV-3-RDR-GIACOBIN-ZIN-V1.0 RADIO WAVE ICE-C-SWPLAS-3-RDR-GIACOBIN-ZIN-V1.0 SOLAR WIND PLASMA Appendix B Acronyms for Submitting Groups Institution Abbreviation Country Department of Energy DOE USA Goddard Space Flight Center GSFC USA International Halley Watch IHW USA Inter Kosmos Institute IKI Russia Infrared Studies Network IRSN USA Jet Propulsion Laboratory JPL USA Central Research Institute for Physics KFKI Hungary Loas Alamos National Laboratory LANL USA Max Planck Institut MPI Germany National Aeronautics and Space Administration NASA USA State University of New York SUNY USA TRW, Incorporated TRW USA