PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 SPACECRAFT_NAME = "NEAR EARTH ASTEROID RENDEZVOUS" OBJECT = TEXT PUBLICATION_DATE = 2000-09-06 NOTE = "AAREADME.TXT File for data set: NEAR-A-SPICE-6-EDR-MATHILDE-V1.0" END_OBJECT = TEXT END NEAR Mission SPICE GEOMETRY Data Set ======================================================================== Introduction ============ This document provides an overview of this volume of the Near Earth Asteroid Rendezvous (NEAR) SPICE Data Archive, including a complete listing of the volume contents. This volume contains navigation and ancillary data in the form of SPICE System kernel files for the NEAR spacecraft during the mission phase with name: MATHILDE covering the year and daynumbers (YYYYDDD) 1997176 through 1997178. See the mission phases table below for a description of the phases of the mission. Coverage of this volume and previous volumes containing portions of the NEAR SPICE data set are given in the table below: VOLUME ID START TIME(YYDDD) STOP TIME(YYDDD) ----------- ------------------- ------------------- NGMATH_0001 1997176 1997178 The SPICE kernel files contain geometric and much other ancillary information needed to recover the full value of science instrument data. In particular SPICE kernels provide spacecraft and planetary ephemerides, instrument mounting alignments, spacecraft orientation, spacecraft sequences of events, data needed for certain time conversions, etc. Data in the SPICE kernel files can be accessed using the NAIF (Navigation and Ancillary Information Facility) software, which is necessary to read these files. The NEAR Science Data Center (SDC) has created this data set for long term archive by the Planetary Data System (PDS), as specified in the NEAR Project Archive Generation, Validation and Transfer Plan (February 1998). This data set is a part of the NEAR level 1b data set delivery as described by the NEAR PDS Data Archive Plan. The Plan also describes the higher level data products, which will become separate PDS data sets. The February 1998 Plan document is in the DOCUMENT subdirectory of this data set, in the file PDSARCHIVEPLAN, in text (.TXT) and rich text (.RTF) formats. The included plan is dated February 1998. It is expected to be updated with final definitions of higher level products. The revised plan will be included in later phase data sets. Volume Format ============= This volume has been formatted according to the ISO-9660 level 2 Interchange Standard. This volume does not contain any Extended Attribute Records (XAR). Thus, some VAX/VMS users may have problems accessing files on this volume. File Formats ============ All text documents and other meta information files such as descriptions, PDS object definitions and detached PDS labels 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 MS-DOS/Windows, Unix, and VMS operating systems. The SPICE kernel data files were prepared to be used under a UNIX environment. Therefore all SPICE text kernel files are UNIX text files, with a line feed character (ASCII 10) at the end of the line, and all SPICE binary kernels files are UNIX binary files in which bit pattern structures for double precision and integer numbers follow IEEE standard. NAIF software is available to convert these files for use on other systems. Volume Contents =============== Files on this volume are organized into a set of subdirectories below the top-level directory. The following table shows the structure and content of these directories. In the table, directory names are enclosed in square brackets ([]). See the *INFO.TXT files in each directory for specific information on the files in the directory. [TOP-LEVEL-DIRECTORY] | |-- AAREADME.TXT The text version of the AAREADME file |-- VOLDESC.CAT Description of the contents of this volume | |--[CATALOG] Directory containing PDS catalog objects | | | |-- CATINFO.TXT Description of files in the CATALOG directory | |-- SPICEDS.CAT Description of SPICE data set | |-- NEARINSTHOST.CAT Description of the spacecraft | |-- NEARMISSION.CAT Description of the mission | |-- PERSON.CAT Description of personnel created this volume | +-- REF.CAT List of publications mentioned in *.CAT files | |--[DATA] Directory containing SPICE data files (kernels.) | | | |--[CK] Directory containing CK files | | | | | |-- CKINFO.TXT Description of files in the DATA/CK directory | | |-- *.BC CK files | | +-- *.LBL PDS labels for CK files | | | | |--[EK] Directory containing EK files | | | | | |-- EKINFO.TXT Description of files in the DATA/EK directory | | |-- *.BPE EK files | | +-- *.LBL PDS labels for EK files | | | |--[FK] Directory containing FK file(s) | | | | | +-- FKINFO.TXT Description of files in the DATA/FK directory | | |-- EROS_FIXED.TF The Eros body-fixed frame kernel. | | +-- *.LBL PDS labels for EK files | | | |--[IK] Directory containing IK files | | | | | |-- IKINFO.TXT Description of files in the DATA/IK directory | | |-- *.TI IK files | | +-- *.LBL PDS labels for IK files | | | |--[LSK] Directory containing LSK files | | | | | |-- LSKINFO.TXT Description of files in the DATA/LSK directory | | |-- *.TLS FK file(s) | | +-- *.LBL PDS labels for LSK files | | | |--[PCK] Directory containing PCK file(s) | | | | | |-- PCKINFO.TXT Description of files in the DATA/PCK directory | | |-- *.TPC PCK file(s) | | |-- *.BPC PCK file(s) | | +-- *.LBL PDS labels for PCK files | | | |--[SCLK] Directory containing SCLK file(s) | | | | | |-- SCLKINFO.TXT Description of files in the DATA/SCLK directory | | |-- *.TSC SCLK file(s) | | +-- *.LBL PDS labels for SCLK files | | | +--[SPK] Directory containing SPK files | | | |-- SPKINFO.TXT Description of files in the DATA/SPK directory | |-- *.BSP SPK files | +-- *.LBL PDS labels for SPK files | |--[DOCUMENT] Directory containing volume related documents | | | |-- DOCINFO.TXT Description of files in the DOCUMENT directory | |-- ONLABELS.TXT Description of PDS labels for SPICE kernels | |-- PDSARCHIVEPLAN.TXT Description of PDS Archive Plan | +-- LBLINFO.TXT Description of PDS label location on this volume | |--[INDEX] Directory containing index files | | | |-- INDXINFO.TXT Description of files in the INDEX directory | |-- INDEX.TAB Index table of SPICE kernels on this volume | +-- INDEX.LBL PDS label for INDEX.TAB file | +--[SOFTWARE] | +-- SOFTINFO.TXT Instructions on how to obtain SPICE Software Mission Phase Parameters (Planned Values; Feb. 2000) ---------------------------------------------------------------------- Phase Name Segment Start Year, End Year, Length (days) (Phase DayOf Year DayOf Year Abbrv) ---------------------------------------------------------------------- CRUISE1 CRU1 1996051 1997175 491 MATHILDE MATH 1997176 1997178 3 CRUISE2 CRU2 1997179 1998022 209 EARTH ERTH 1998023 1998026 4 CRUISE3 CRU3 1998027 1998356 330 EROS/FLY/BY ERFB 1998357 1998357 1 CRUISE4 CRU4 1998358 2000010 383 EROS/ORBIT EROS 2000011 2001043 399 EROS/SURFACE ERSF 2001044 2001059 16 ---------------------------------------------------------------------- Whom to Contact for Information =============================== PDS Navigation and Ancillary Information Facility (NAIF), MAIL STOP 301-125L Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena, CA, 91109-8099 818-354-3869 WWW Site: http://naif.jpl.nasa.gov Electronic mail address: naif@naif.jpl.nasa.gov NEAR Science Data Center Howard W. Taylor The Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Road Laurel MD 20723 Email: Howard.Taylor@jhuapl.edu