 
 
Post-Separation Deep Impact Impactor S/C Orientation CK, Based on APID 33/23
===========================================================================
 
 
Orientation Data in the File
--------------------------------------------------------
 
     This file contains reconstructed orientation of the Deep Impact
     Impactor (DII) spacecraft frame, DII_SPACECRAFT (NAIF ID -70000),
     relative to the EME J2000 inertial frame, J2000 (NAIF ID 1).
 
 
Status
--------------------------------------------------------
 
     This file was created for archiving in Planetary Data System (PDS)
     after the end of the primary mission, on September 13, 2005 using
     all relevant telemetry data available at that time.
 
 
Pedigree
--------------------------------------------------------
 
     This file was generated using MSOPCK program to package into CK
     format spacecraft orientation quaternions and angular rates sent
     to the ground in the following APID 33/23 channels:
 
          B-2055 -- Body Frame Attitude Quaternion, Q1
          B-2056 -- Body Frame Attitude Quaternion, Q2
          B-2057 -- Body Frame Attitude Quaternion, Q3
          B-2058 -- Body Frame Attitude Quaternion, Q4
          B-2299 -- Estimated body frame spacecraft body rate vector, X axis
          B-2300 -- Estimated body frame spacecraft body rate vector, Y axis
          B-2301 -- Estimated body frame spacecraft body rate vector, Z axis
 
     All post-separation data for these channels available at the end
     of the primary mission from both (MASTER and CDR) Telemetry Data
     Systems (TDSs) were used to make this file.
 
 
Approximate Time Coverage
--------------------------------------------------------
 
     This file covers the following time period:
 
          Coverage Begin UTC        Coverage End UTC
          ------------------------  -----------------------
          2005-JUL-03 06:03:04.895  2005-JUL-04 05:44:25.790
 
     This file is a type 3 CK file which provides linear interpolation
     between orientation data points extracted from telemetry. Such
     interpolation is not applied to the whole coverage of the file but
     only inside intervals where enough orientation telemetry data was
     available and orientation data points were close to each other in
     time for such interpolation to make sense.
 
     The nominal quaternion/rate time spacing in the telemetry stream
     was 2 or 8 seconds between adjacent data points. The duration of
     the longest interval over which the data may be interpolated was
     set to 60 seconds. For all requests for data falling between two
     adjacent data points separated by more than 60 seconds the
     SPICELIB CK readers will return a logical flag stating "POINTING
     NOT FOUND".
 
     A table containing the complete list of valid interpolation
     intervals in the file segments is provided at the end of these
     comments.
 
 
Usage Note
--------------------------------------------------------
 
     In order to use this file a DII SCLK file, containing coefficients
     mapping DII on-board time to ET, standard LSK file, providing UTC
     to ET mapping, and DI Frame Definitions file must be loaded into a
     user's program.
 
 
Contacts
--------------------------------------------------------
 
     If you have any questions regarding this data contact NAIF at JPL:
 
        Boris V. Semenov
        (818)-354-8136
        boris.semenov@jpl.nasa.gov
 
 
Appendix 1 -- MSOPCK Setup Parameters
--------------------------------------------------------
 
\begindata
 
   PRODUCER_ID             = 'NAIF/JPL'
 
   LSK_FILE_NAME           = 'naif0007.tls'
   SCLK_FILE_NAME          = 'DII_SCLKSCET.00008.tsc'
   FRAMES_FILE_NAME        = 'di_v15.tf'
   INTERNAL_FILE_NAME      = 'DII SC APID 33/23 CHANNELS-BASED CK FILE'
   COMMENTS_FILE_NAME      = 'dii_sc_2005-07-04.bc.cmt'
 
   CK_TYPE                 = 3
   CK_SEGMENT_ID           = 'DII SC CHTLM-BASED ATTITUDE'
   INSTRUMENT_ID           = -70000
   REFERENCE_FRAME_NAME    = 'J2000'
   ANGULAR_RATE_PRESENT    = 'YES'
 
   INPUT_DATA_TYPE         = 'MSOP QUATERNIONS'
   INPUT_TIME_TYPE         = 'SCLK'
   ANGULAR_RATE_FRAME      = 'INSTRUMENT'
 
   MAXIMUM_VALID_INTERVAL  = 60
   QUATERNION_NORM_ERROR   = 1.0E-3
 
\begintext
 
 
Appendix 2 -- Interpolation Interval Summary
--------------------------------------------------------
 
     This interpolation interval summary was generated using CKBRIEF with
     the following options:
 
          naif0007.tls DII_SCLKSCET.00008.tsc -utc -dump
 
Segment No.: 1
 
Object:  -70000
  Interval Begin UTC       Interval End UTC         AV
  ------------------------ ------------------------ ---
  2005-JUL-03 06:03:04.895 2005-JUL-03 06:55:52.928 Y
  2005-JUL-03 06:57:04.928 2005-JUL-03 07:55:52.965 Y
  2005-JUL-03 07:57:04.966 2005-JUL-03 08:55:53.002 Y
  2005-JUL-03 08:57:05.003 2005-JUL-03 09:55:29.039 Y
  2005-JUL-03 09:57:05.040 2005-JUL-03 10:55:53.077 Y
  2005-JUL-03 10:57:05.078 2005-JUL-03 11:55:53.114 Y
  2005-JUL-03 11:57:05.115 2005-JUL-03 12:55:53.151 Y
  2005-JUL-03 12:57:05.152 2005-JUL-03 13:55:53.189 Y
  2005-JUL-03 13:56:57.189 2005-JUL-03 14:48:09.221 Y
  2005-JUL-03 14:50:25.223 2005-JUL-03 14:55:53.226 Y
  2005-JUL-03 14:56:57.227 2005-JUL-03 15:55:45.263 Y
  2005-JUL-03 15:57:05.264 2005-JUL-03 16:55:53.301 Y
  2005-JUL-03 16:56:57.301 2005-JUL-03 17:55:37.338 Y
  2005-JUL-03 17:57:05.339 2005-JUL-03 18:55:45.375 Y
  2005-JUL-03 18:57:05.376 2005-JUL-03 19:55:53.413 Y
  2005-JUL-03 19:57:05.413 2005-JUL-03 20:55:45.450 Y
  2005-JUL-03 20:57:05.451 2005-JUL-03 21:55:53.487 Y
  2005-JUL-03 21:57:05.488 2005-JUL-03 22:53:13.523 Y
  2005-JUL-03 22:54:25.524 2005-JUL-03 22:55:53.524 Y
  2005-JUL-03 22:57:37.526 2005-JUL-03 23:02:09.528 Y
  2005-JUL-03 23:03:21.529 2005-JUL-03 23:19:29.539 Y
  2005-JUL-03 23:20:33.540 2005-JUL-03 23:55:53.562 Y
  2005-JUL-03 23:57:05.563 2005-JUL-04 00:50:57.596 Y
  2005-JUL-04 00:52:01.597 2005-JUL-04 01:50:49.633 Y
  2005-JUL-04 01:52:01.634 2005-JUL-04 02:50:57.671 Y
  2005-JUL-04 02:52:01.671 2005-JUL-04 03:50:57.708 Y
  2005-JUL-04 03:52:01.709 2005-JUL-04 04:39:29.738 Y
  2005-JUL-04 04:40:33.739 2005-JUL-04 05:44:25.790 Y
 
 
