Objects In This Ephemeris
--------------------------------------------------------
 
        Name                  Id-code
        -------------         -------
        SIRTF.................-79
 
 
Approximate Time Coverage
 
     2001 DEC 01 15:49:00
 
        From: 2001 DEC 01 15:49 (TDB)
        To  : 2007 FEB 03 15:01 (TDB)
 
 
Status
--------------------------------------------------------
 
     This is the current official NAIF ephemeris for SIRTF. You should not
     attach too much significance to the word official. This file just
     happens to be one we picked. This file was copied from the file
     launch2eom.bsp. The ID-code for SIRTF in the the original file was
     -99. The original file was copied to this file and the ID-code changed
     to the official number (-79). The source and history of this file is a
     bit vague. Updates to this ephemeris will be made available as they
     are generated by the project.
 
     The spkmerge log for the original file is presented below.
 
        ; launch2eom.bsp LOG FILE
        ;
        ; Created 1997-07-29/09:38:24.00.
        ;
        ; BEGIN SPKMERGE COMMANDS
 
        LEAPSECONDS_KERNEL   = /usr/local/naif/data/leapseconds.ker
 
        SPK_KERNEL           = launch2eom.bsp
          SOURCE_SPK_KERNEL  = sirtf.ascent.011201.bsp
            INCLUDE_COMMENTS = NO
            BODIES           = -99
            BEGIN_TIME       = 2001 DEC 01 15:46:59.817
            END_TIME         = 2001 DEC 01 15:58:46.031
          SOURCE_SPK_KERNEL  = solar_orbit.7920H.bsp
            INCLUDE_COMMENTS = NO
            BODIES           = -99
            BEGIN_TIME       = 2001 DEC 01 15:58:46.031
            END_TIME         = 2007 FEB 03 15:00:00.000
 
        ; END SPKMERGE COMMANDS
 
 
Production/History of this Ephemeris
--------------------------------------------------------
 
     This ephemeris was produced by Bill Taber of the Navigation Ancillary
     Information Facility (NAIF) at the Jet Propulsion Laboratory on
     24-March-200 for general use by the SIRTF project.
 
 
Usage
--------------------------------------------------------
 
     The state of SIRTF as given in this file is given with respect to the
     sun or earth over the intervals indicated below (all times are
     approximate TDB).
 
        SIRTF (-79) w.r.t. EARTH  2001 DEC 01 15:48  to 2001 DEC 28 02:18
        SIRTF (-79) w.r.t. SUN    2001 DEC 28 02:18  to 2007 FEB 03 15:01
 
     To determine the state of SIRTF with respect to any object other than
     its center of motion (the sun or earth), you need at a minimum a
     planetary ephemeris. It is recommended that you use DE403 or 405 when
     computing states of SIRTF.
 
     DE403 is available via anonymous ftp on NAIF's ftp server: naif (ip
     address 137.78.218.69) in the directory pub/naif/generic_kernels/spk.
     Both binary and transfer format ephemerides are available.
 
 
Accuracy
--------------------------------------------------------
 
     This ephemeris for study purpose only. The accuracy of the ephemeris
     is unknown
 
Inquiries
 
     If you have any questions regarding this ephemeris contact
 
        Bill Taber
        btaber@spice.jpl.nasa.gov
        Phone (818) 354-4279
        FAX   (818) 393-6388
 
        JPL
        MS 301/125L
        4800 Oak Grove Drive
        Pasadena, CA 91109