 
 
DS1 Borrelly Flyby Predict CK.
====================================================================
 
   Version 1.0 -- September 21, 2001 -- BVS/NAIF
 
 
Abstract
-------------------------------------------------------
 
   This CK is based on the flyby s/c attitude profile provided in the
   PEF file N_0_encounter.merge.091301.pef.
 
Pedigree
-------------------------------------------------------
 
   This file was generated using prediCkt utility program provided
   with the inputs from the Appendix 1 (see below) and the following
   DS1 SPICE kernels:
 
      Type  Name
      ----  ------------------------------------------
      SPK   de405s.bsp
      SPK   nav.sc50.cby-010916.bsp
      SPK   sb19p_aut105.bsp
      TEXT  DS1_SCLKSCET.00071.tsc
      TEXT  ds1_v62.tf
      TEXT  naif0007.tls
 
   This C-kernel matches the specification given below to 0.01000 degrees.
 
 
Contact information
-------------------------------------------------------
 
   Boris V. Semenov, NAIF/JPL
   Boris.Semenov@jpl.nasa.gov
   (818)-354-8136
 
 
Appendix 1: prediCkt inputs
====================================================================
 
Directions
-------------------------------------------------------
 
   The "fundamental" directions upon which the orientation is constructed
   are:
 
      -- to Borrelly;
 
      -- to Sun;
 
      -- to reference star E58 @ RA = 26.349, DEC = 9.158;
 
      -- to reference star (?) @ RA = 63.606, DEC = -62.474;
 
      -- to reference star (?) @ RA = 70.140, DEC = -41.864;
 
      \begindata
 
         DIRECTION_SPECS  += ( 'ToSUN      = POSITION OF SUN      -' )
         DIRECTION_SPECS  += (              'FROM DS-1            -' )
         DIRECTION_SPECS  += (              'CORRECTION LT+S       ' )
 
         DIRECTION_SPECS  += ( 'ToBorrelly = POSITION OF BORRELLY -' )
         DIRECTION_SPECS  += (              'FROM DS-1            -' )
         DIRECTION_SPECS  += (              'CORRECTION LT+S       ' )
 
         DIRECTION_SPECS  += ( 'ToR26D9    = FIXED J2000          -' )
         DIRECTION_SPECS  += (              'RA   26.349 degrees  -' )
         DIRECTION_SPECS  += (              'DEC   9.158 degrees   ' )
 
         DIRECTION_SPECS  += ( 'ToR63Dn62  = FIXED J2000          -' )
         DIRECTION_SPECS  += (              'RA   63.606 degrees  -' )
         DIRECTION_SPECS  += (              'DEC -62.474 degrees   ' )
 
         DIRECTION_SPECS  += ( 'ToR70Dn41  = FIXED J2000          -' )
         DIRECTION_SPECS  += (              'RA   70.140 degrees  -' )
         DIRECTION_SPECS  += (              'DEC -41.864 degrees   ' )
 
      \begintext
 
   The "derived" directions upon which the orientation is constructed
   are:
 
      -- 0.5214 degrees trailing Borrelly (first turn in two mosaics);
 
      -- 0.5214 degrees ahead off Borrelly (second turn in two mosaics);
 
      -- 1.5 degrees ahead off Borrelly (first IR slit scan);
 
      -- IR keyhole to Borrelly (s/c +Z ~0.65 degrees ahead off Borrelly
         and ~0.28 degreed off MICAS CCD ZY plane)
 
 
      \begindata
 
         DIRECTION_SPECS  += ( 'OffBORp05 = ROTATE ToBorrelly    -' )
         DIRECTION_SPECS  += (              '0.5214 DEGREES       -' )
         DIRECTION_SPECS  += (              'TOWARDS ToSUN          ' )
 
         DIRECTION_SPECS  += ( 'OffBORn05 = ROTATE ToBorrelly    -' )
         DIRECTION_SPECS  += (              '0.5214 DEGREES       -' )
         DIRECTION_SPECS  += (              'AWAY FROM ToSUN       ' )
 
         DIRECTION_SPECS  += ( 'OffBORn15 = ROTATE ToBorrelly    -' )
         DIRECTION_SPECS  += (              '1.5 DEGREES          -' )
         DIRECTION_SPECS  += (              'AWAY FROM ToSUN       ' )
 
         DIRECTION_SPECS  += ( 'OffBORn06 = ROTATE ToBorrelly    -' )
         DIRECTION_SPECS  += (              '0.65 DEGREES         -' )
         DIRECTION_SPECS  += (              'AWAY FROM ToSUN       ' )
 
         DIRECTION_SPECS  += ( 'SUNxBOR    = CROSS PRODUCT        -' )
         DIRECTION_SPECS  += (              'ToSUN ToBorrelly      ' )
 
         DIRECTION_SPECS  += ( 'OffBORn02 = ROTATE OffBORn06    -' )
         DIRECTION_SPECS  += (              '0.28 DEGREES         -' )
         DIRECTION_SPECS  += (              'AWAY FROM SUNxBOR     ' )
 
      \begintext
 
 
Orientations
-------------------------------------------------------
 
   The following orientations are based on the directions specified above:
 
   1) reference star attitudes:
 
      -- MICAS CCD +Z to reference star E58 @ RA = 26.349,
         DEC = 9.158, MICAS CCD -Y (s/c +X) to Sun;
 
      -- MICAS CCD +Z to reference star (?) @ RA = 63.606,
         DEC = -62.474, MICAS CCD -Y (s/c +X) to Sun;
 
      -- MICAS CCD +Z to reference star (?) @ RA = 70.140,
         DEC = -41.864, MICAS CCD -Y (s/c +X) to Sun;
 
      \begindata
 
         ORIENTATION_NAME += 'StarR26D9'
         PRIMARY          += '+Z = ToR26D9'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
         ORIENTATION_NAME += 'StarR63Dn62'
         PRIMARY          += '+Z = ToR63Dn62'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
         ORIENTATION_NAME += 'StarR70Dn41'
         PRIMARY          += '+Z = ToR70Dn41'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
      \begintext
 
   2) comet tracking/mosaics with CCD attitudes:
 
      -- MICAS CCD +Z to Borrelly, MICAS CCD -Y (s/c +X) to Sun;
 
      -- MICAS CCD +Z trailing Borrelly by 0.5, MICAS CCD -Y
         (s/c +X) to Sun;
 
      -- MICAS CCD +Z ahead off Borrelly by 0.5, MICAS CCD -Y
         (s/c +X) to Sun;
 
      -- MICAS CCD +Z ahead off Borrelly by 1.5, MICAS CCD -Y
         (s/c +X) to Sun;
 
      \begindata
 
         ORIENTATION_NAME += 'Borrelly'
         PRIMARY          += '+Z = ToBorrelly'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
         ORIENTATION_NAME += 'BorrellyOffp05'
         PRIMARY          += '+Z = OffBORp05'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
         ORIENTATION_NAME += 'BorrellyOffn05'
         PRIMARY          += '+Z = OffBORn05'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
      \begintext
 
   3) comet imaging with IR attitudes:
 
      -- MICAS IR keyhole to Borrelly, MICAS IR +X (s/c +X) to Sun;
 
      -- MICAS CCD +Z ahead off Borrelly by 1.5, MICAS CCD -Y
         (s/c +X) to Sun;
 
      \begindata
 
         ORIENTATION_NAME += 'BorrellyOffn02'
         PRIMARY          += '+Z = OffBORn02'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
         ORIENTATION_NAME += 'BorrellyOffn15'
         PRIMARY          += '+Z = OffBORn15'
         SECONDARY        += '-Y = ToSUN'
         BASE_FRAME       += 'J2000'
 
      \begintext
 
   4) PEPE close flyby attitude:
 
      -- MICAS CCD +Z to reference star (?) @ RA = 63.606,
         DEC = -62.474, MICAS CCD -Y (s/c +X) to Sun;
 
      Uses 'StarR63Dn62' spec. from above.
 
   5) post-flyby playback attitude:
 
      -- MICAS CCD +Z to reference star E58 @ RA = 26.349,
         DEC = 9.158, MICAS CCD -Y (s/c +X) to Sun;
 
      Uses 'StarR26D9' spec. from above.
 
 
Schedule
-------------------------------------------------------
 
   The following attitude schedule was derived from the latest PEF
   file 'N_0_encounter.merge.091301.pef':
 
         TIME (UTC from PEF)   ATTITUDE MODE              TURN DURATION
         -------------------- --------------------------- -------------
     (+) 2001 SEP 22 16:33:55 Star (26.349,9.158)
         2001 SEP 22 20:07:06 Star (63.606,-62.474)       15 min
         2001 SEP 22 21:00:05 CCD to Borrelly              1 min
         2001 SEP 22 21:07:13 IR KH to Borrelly           20 sec
         2001 SEP 22 21:15:32 Star (70.140,-41.864)        3 min
         2001 SEP 22 21:54:27 CCD to Borrelly              3 min
         2001 SEP 22 22:07:32 CCD Mosaic 1 Turn 1         20 sec
         2001 SEP 22 22:08:43 CCD Mosaic 1 Turn 2         40 sec
         2001 SEP 22 22:10:13 CCD to Borrelly             20 sec
         2001 SEP 22 22:16:59 CCD Mosaic 2 Turn 1         20 sec
         2001 SEP 22 22:18:00 CCD Mocais 2 Turn 2         40 sec
         2001 SEP 22 22:19:41 CCD to Borrelly             20 sec
     (+) 2001 SEP 22 22:22:51 (*)
         2001 SEP 22 22:25:34 CCD to Borrelly (adjustmnt) n/a
         2001 SEP 22 22:28:10 1.5 ahead for IR slit scan  30 sec
         2001 SEP 22 22:28:52 Hold s/c for IR slit scan   60 sec
     (+) 2001 SEP 22 22:29:22 Star (63.606,-62.474)        1 min
         2001 SEP 22 22:59:09 Star (26.349,9.158)         15 min
     (+) 2001 SEP 23 15:44:00
 
     (+) these times are NOT from the PEF;
 
     (*) times after this tag will be adjusted by on-board s/w by
         up to 30 seconds based on closest approach time estimate;
 
   Notes:
 
      -- times tags in the keyword assignments are UTCs adjusted for
         turn durations;
 
   These keywords implement the attitude profile:
 
      \begindata
 
         CK-SCLK              =  30
         CK-SPK               = -30
         CK-FRAMES            = -30000
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = StarR26D9'
         CK-30000START       += @2001-SEP-22-16:34:59
         CK-30000STOP        += @2001-SEP-22-20:08:10
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = StarR63Dn62'
         CK-30000START       += @2001-SEP-22-20:23:10
         CK-30000STOP        += @2001-SEP-22-21:01:09
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = Borrelly'
         CK-30000START       += @2001-SEP-22-21:02:09
         CK-30000STOP        += @2001-SEP-22-21:08:17
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffn02'
         CK-30000START       += @2001-SEP-22-21:08:37
         CK-30000STOP        += @2001-SEP-22-21:16:36
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = StarR70Dn41'
         CK-30000START       += @2001-SEP-22-21:19:36
         CK-30000STOP        += @2001-SEP-22-21:55:31
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = Borrelly'
         CK-30000START       += @2001-SEP-22-21:58:31
         CK-30000STOP        += @2001-SEP-22-22:08:34
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffp05'
         CK-30000START       += @2001-SEP-22-22:08:54
         CK-30000STOP        += @2001-SEP-22-22:09:47
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffn05'
         CK-30000START       += @2001-SEP-22-22:10:27
         CK-30000STOP        += @2001-SEP-22-22:11:17
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = Borrelly'
         CK-30000START       += @2001-SEP-22-22:11:37
         CK-30000STOP        += @2001-SEP-22-22:18:03
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffp05'
         CK-30000START       += @2001-SEP-22-22:18:23
         CK-30000STOP        += @2001-SEP-22-22:19:04
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffn05'
         CK-30000START       += @2001-SEP-22-22:19:44
         CK-30000STOP        += @2001-SEP-22-22:20:45
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = Borrelly'
         CK-30000START       += @2001-SEP-22-22:21:05
         CK-30000STOP        += @2001-SEP-22-22:29:14
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffn15'
         CK-30000START       += @2001-SEP-22-22:29:44
         CK-30000STOP        += @2001-SEP-22-22:29:56
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = BorrellyOffn15 -'
         CK-30000ORIENTATION += 'AT 2001-SEP-22-22:29:56'
         CK-30000START       += @2001-SEP-22-22:29:56
         CK-30000STOP        += @2001-SEP-22-22:31:26
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = StarR63Dn62'
         CK-30000START       += @2001-SEP-22-22:32:26
         CK-30000STOP        += @2001-SEP-22-22:59:09
 
         CK-30000ORIENTATION += 'SOLUTION TO DS1_MICAS_CCD = StarR26D9'
         CK-30000START       += @2001-SEP-22-23:14:09
         CK-30000STOP        += @2001-SEP-23-15:46:00
 
      \begintext
 
 
