 
 
Stardust Spacecraft Trajectory SPK File, OPNAV Solution for Wild 2 Encounter
===========================================================================
 
     Data produced by Shyam Bhaskaran, OPNAV/JPL on Jan 9, 2004; file
     subsetted and documented on May 13, 2004 by Boris Semenov,
     NAIF/JPL.
 
 
Trajectory Data in the File
--------------------------------------------------------
 
     This file contains trajectory data for Stardust (SDU) spacecraft.
     The NAIF ID code for the Stardust is -29000. It also contains
     ephemeris data for Wild 2 (ID 1000107), solar system planet
     barycenters, and planets.
 
 
Status
--------------------------------------------------------
 
     This file has been prepared for archiving with the Planetary Data
     System.
 
 
Pedigree
--------------------------------------------------------
 
     This file contains improved spacecraft trajectory for Wild 2
     encounter computed by Shyam Bhaskaran, SDU Optical Navigation
     (OPNAV) team. The following description of the trajectory was
     provided by the data producer:
 
         "The trajectory segment surrounding the closest approach to
          Wild 2 (time span from Jan 2, 2004 18:22:36 ET to Jan 2, 2004
          20:22:36) is specific and distinct from the the rest of the
          spacecraft trajectory. It was computed by fitting optical
          image data of Wild 2 taken by the spacecraft through closest
          approach, adjusting the position and attitude of the
          spacecraft relative to Wild 2 to achieve the best fit.
          Because it simultaneously solved for position and attitude,
          it must be used in conjunction with the special flyby
          attitude kernel in order to get the most accurate pointing
          information of the camera and other instruments.  Note that
          because of the method in which this trajectory segment was
          computed, it does not provide an accurate representation of
          the heliocentric location of the spacecraft; only its
          location relative to Wild 2 is accurate. Thus, it should only
          be used for the purpose of obtaining geometric and pointing
          information of Wild 2 relative to the spacecraft in the short
          time span surrounding the encounter."
 
     This trajectory was originally released to the project in the SPK
     file named ``pfile_sdu_w2flyby.xfr.bsp''. At the time of archiving
     the file was renamed and the coverage of Wild 2 and planet
     ephemerides stored in it was adjusted to match the coverage of
     spacecraft trajectory segment.
 
 
Approximate Time Coverage
--------------------------------------------------------
 
     This file covers the following time span:
 
          START_TIME (ET) = 2004 JAN 02 18:22:36.000
          STOP_TIME  (ET) = 2004 JAN 02 20:22:36.000
 
 
Contacts
--------------------------------------------------------
 
     If you have any question regarding this data contact NAIF at JPL:
 
        Boris V. Semenov
        (818)-354-8136
        boris.semenov@jpl.nasa.gov
 
 
Original Comments from ``pfile_sdu_w2flyby.xfr.bsp'' SPK
--------------------------------------------------------
 
; ./pfile_sdu_w2flyby.bsp LOG FILE
 
; Created 2004-01-09/00:59:19.00.
;
; BEGIN SPKMERGE COMMANDS
 
LEAPSECONDS_KERNEL   = ./naif0007.tls
 
SPK_KERNEL           = ./pfile_sdu_w2flyby.bsp
  SOURCE_SPK_KERNEL  = ./btrajfile.bsp
    INCLUDE_COMMENTS = NO
    BODIES           = -29
    BEGIN_TIME       = 2004 JAN 02 18:21:31.816
    END_TIME         = 2004 JAN 02 20:21:31.816
  SOURCE_SPK_KERNEL  = /nav/sdu/import/ephem/de405w.bsp
    INCLUDE_COMMENTS = NO
    BODIES           = 499, 299, 199, 399, 301, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
    BEGIN_TIME       = 1989 DEC 27 23:59:03.816
    END_TIME         = 2021 JAN 01 23:58:55.816
  SOURCE_SPK_KERNEL  = /nav/sdu/delivery/od/W14hAmO/OD_updt_sb_81p_sd31.bsp
    INCLUDE_COMMENTS = NO
    BODIES           = 1000107
    BEGIN_TIME       = 2001 DEC 31 23:58:55.816
    END_TIME         = 2007 APR 04 23:58:55.814
 
; END SPKMERGE COMMANDS
 
 
 
