PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2002-10-17
NOTE = "This file describes the contents of this directory."
END_OBJECT = TEXT
END
This directory contains the SPICE Leapseconds, Planetary Constants and
Ephemeris kernels in <CR><LF> ASCII format. True SPICE transfer format
kernels have the line termination characters of the native platform. In order
to convert these files to binary forms that can be loaded into SPICE routines,
the ASCII must first be converted to native ASCII. Only then will "spacit"
work.
The file provided here are provided for user convenience only. They are not
part of the "official" archive portion on this volume. The NAIF Node of the
PDS maintains the official, latest version of all PSICE products on its ftp
site (naif.jpl.nasa.gov). Please verify that these kernels are up to date
before using them.
SPICE SPK kernels allow computation of the position and velocity (the state
vector) of any one of the 'bodies' described relative to any of the others.
The state returned can be geometric (no corrections) or corrected for light
time and/or stellar aberration. The state vector is returned in any of a
number of inertial or body fixed reference frames, as selected by the user;
examples are B1950, J2000 and IAU_JUPITER (System III). Getting state
vectors, including the conversion to Saturn L1 coordinates if requested,
is accomplished using NAIF Toolkit software. For more information regarding
SPICE or obtaining the NAIF Toolkit, please contact Chuck Acton (INTERNET:
cacton@spice.jpl.nasa.gov, PHONE: (818)354-3869) or check the PDS website's
(http://pds.jpl.nasa.gov) link to the NAIF node for current NAIF contact
information.
The geometry information provided on this volume only includes the SPICE SPK
file (containing spacecraft and target body ephemeris). As of the date of
publication of this volume, no spacecraft orientation data were available.
The PDS/NAIF node is in the process of restoring spacecraft orientation
information for the SPICE pointing kernel (C-kernel). NAIF plans to make
this kernel available in a future archive. For information regard the
availability of the Voyager 1 and 2 SPICE C-kernel, please contact
Chuck Acton as described above.
The PDS/PPI node is in the process of preparing a data set that will contain
the spacecraft orientation information relevant to PRA and other Voyager
instruments for which spacecraft orientation is important. This data set
will be archived in a future volume. For information regarding the
availability of this data set, please contact PDS Operator at the PDS/PPI
node (INTERNET: pds_operator@igpp.ucla.edu, PHONE: (310) 206-6073).
[SPICE]
|
|- SPICEINFO.TXT (this file) describes directory contents
|
|- LEAPSECS.TLS SPICE Leapseconds kernel containing a tabulation of
| leapseconds; used in time conversions when processing
| other SPICE files, such as SPK and PCK
|
|- LEAPSECS.LBL PDS label for LEAPSECS.TLS
|
|- PCONST.TPC Planetary Constants kernel (PCK) providing selected
| physical and cartographic constants for planets and
| satellites; typically used to convert position
| measurements into a body-fixed reference frame
|
|- PCONST.LBL PDS label for PCONST.TPC
|
|- VG1_SAT.TSP Voyager 1 Saturn encounter SP kernel in ASCII format
|
|- VG1_SAT.LBL PDS label for VG1_SAT.TSP
|
|- VG2_SAT.TSP Voyager 2 Saturn encounter SP kernel in ASCII format
|
|- VG2_SAT.LBL PDS label for VG2_SAT.TSP
|
|
|- [SPICEDOCS] contains a description of the NAIF SPICE System (SPICE)
| document
|
Document description:
SPICE/SPICE Acton, C.H., 'Ancillary Data Services of NASA's
Navigation and Ancillary Information Facility,' Planet.
Space Sci., Vol. 44, No. 1, pp. 65-70, 1996
[REFERENCE_KEY_ID = 'ACTON1996']
*Documents reproduced from:
Space Science Reviews, Voyager Project Special Issue,
Vol. 21, No. 2, Dec. 1977. Reprinted with permission of Kluwer
Academic Publishers, Dordrecht, Boston, London.
The following copyright applies to all of the Space Science Reviews articles
reproduced on this volume:
This material is posted here with permission of Kluwer Academic
Publishers (Kluwer). Such permission of Kluwer does not in any way
imply Kluwer endorsement of any PDS product or service. Internal or
personal use of this material is permitted. However, permission to
reprint/republish this material for advertising or promotional
purposes or for creating new collective works for resale or
redistribution must be obtained from Kluwer.