KPL/FK

CASSINI Dynamic Frame Definitions for TSS
===========================================================================

   This kernel contains dynamic frame definitions to support the ``Thermal
   Synthesizer System'' (TSS) tool analysis of CASSINI mission.


Version and Date
---------------------------------------------------------------

   Version 1.0 -- March 12, 2015 -- Boris Semenov

      Initial release.


References
---------------------------------------------------------------

      1. "Kernel Pool Required Reading"

      2. "Frames Required Reading"

      3. TSS USER MANUAL, Volume 5, Version 14.01


Contact Information
---------------------------------------------------------------

   Direct questions, comments, or concerns about the contents of this 
   kernel to:

      Boris Semenov, NAIF/JPL, Boris.Semenov@jpl.nasa.gov


Implementation Notes
---------------------------------------------------------------

   This file is used by the SPICE system as follows: programs that make
   use of this frame kernel must "load" the kernel using SPICE's FURNSH
   routine, normally during program initialization.  Loading the kernel
   associates the data items with their names in a data structure
   called the "kernel pool". This file was created and may be updated
   with a text editor or word processor.


Frames Defined in This Kernel
---------------------------------------------------------------

   The following frames are defined in this kernel file:
 
      Frame Name                Relative To              Type     NAIF ID
      =======================   ===================      =======  =======
 
      Dynamic Frames:
      ------------------
      CASSINI_OCS_PLA_SATURN    J2000                    DYNAMIC   -82910
      CASSINI_OCS_SUN_SATURN    J2000                    DYNAMIC   -82911


TSS OCS Frame for ``Planet Orientation'' Cassini-Saturn Case
---------------------------------------------------------------

   The TSS OCS Frame for ``Planet Orientation'' Cassini-Saturn Case is
   defined in section 5.3.4 of [3] as follows:

      In the planet-oriented mode, the OCS Z-axis points away from the
      center of the planet. The X-axis points in the direction of
      motion and the Y-axis completes the right-handed set.

   This frame named 'CASSINI_OCS_PLA_SATURN' with ID -82910 is defined
   below as a SPICE dynamic two-vector style frame.

   In order for the orientation of this frame to be computed by SPICE
   an SPK containing Cassini trajectory must be loaded into the user
   application.

      \begindata

         FRAME_CASSINI_OCS_PLA_SATURN = -82910
         FRAME_-82910_NAME            = 'CASSINI_OCS_PLA_SATURN'
         FRAME_-82910_CLASS           = 5
         FRAME_-82910_CLASS_ID        = -82910
         FRAME_-82910_CENTER          = -82
         FRAME_-82910_RELATIVE        = 'J2000'
         FRAME_-82910_DEF_STYLE       = 'PARAMETERIZED'
         FRAME_-82910_FAMILY          = 'TWO-VECTOR'
         FRAME_-82910_PRI_AXIS        = 'Z'
         FRAME_-82910_PRI_VECTOR_DEF  = 'OBSERVER_TARGET_POSITION'
         FRAME_-82910_PRI_OBSERVER    = 'SATURN' 
         FRAME_-82910_PRI_TARGET      = 'CASSINI'
         FRAME_-82910_PRI_ABCORR      = 'NONE'
         FRAME_-82910_SEC_AXIS        = 'X'
         FRAME_-82910_SEC_VECTOR_DEF  = 'OBSERVER_TARGET_VELOCITY'
         FRAME_-82910_SEC_OBSERVER    = 'SATURN' 
         FRAME_-82910_SEC_TARGET      = 'CASSINI'
         FRAME_-82910_SEC_ABCORR      = 'NONE'
         FRAME_-82910_SEC_FRAME       = 'J2000'

      \begintext 


TSS OCS Frame for ``Sun Orientation'' Sun-Saturn Case
---------------------------------------------------------------

   The TSS OCS Frame for ``Sun Orientation'' Sun-Saturn Case is
   defined in section 5.3.4 of [3] as follows:

      For the sun oriented option ... The vehicle +Z axis is parallel
      to the planet/sun vector and effectively points towards the sun.
      The +X axis lies in the equatorial plane and the +Y axis forms
      the right-handed set.

   NOTE: this definition is ambiguous as it does not constrain +Y axis
   to pointing towards north pole or south pole. The diagram
   accompanying the definition had +Y axis pointing toward the north
   pole. So that's what's implemented in this FK.
 
   This frame named 'CASSINI_OCS_SUN_SATURN' with ID -82911 is defined
   below as a SPICE dynamic two-vector style frame.
 
   In order for the orientation of this frame to be computed by SPICE
   an SPK containing Cassini trajectory and a generic PCK must be
   loaded into the user application.

      \begindata

         FRAME_CASSINI_OCS_SUN_SATURN = -82911
         FRAME_-82911_NAME            = 'CASSINI_OCS_SUN_SATURN'
         FRAME_-82911_CLASS           = 5
         FRAME_-82911_CLASS_ID        = -82911
         FRAME_-82911_CENTER          = -82
         FRAME_-82911_RELATIVE        = 'J2000'
         FRAME_-82911_DEF_STYLE       = 'PARAMETERIZED'
         FRAME_-82911_FAMILY          = 'TWO-VECTOR'
         FRAME_-82911_PRI_AXIS        = 'Z'
         FRAME_-82911_PRI_VECTOR_DEF  = 'OBSERVER_TARGET_POSITION'
         FRAME_-82911_PRI_OBSERVER    = 'SATURN' 
         FRAME_-82911_PRI_TARGET      = 'SUN'
         FRAME_-82911_PRI_ABCORR      = 'NONE'
         FRAME_-82911_SEC_AXIS        = 'Y'
         FRAME_-82911_SEC_VECTOR_DEF  = 'CONSTANT'
         FRAME_-82911_SEC_SPEC        = 'RECTANGULAR'
         FRAME_-82911_SEC_VECTOR      = ( 0.0, 0.0, 1.0 )
         FRAME_-82911_SEC_FRAME       = 'IAU_SATURN'

      \begintext 

End of FK.