KPL/IK

NEAR X-ray Spectrometer IK file
-----------------------------------------------------------------------

   Version 1.2 (prototype) by JAB, NAIF/JPL, September 11, 1997

      SC_BUS frame definitions were swapped with SC_BUS_PRIME, 
      to follow the NEAR project's use of the code -93000 for the 
      SC_BUS_PRIME frame.        

   Version 1.1 (prototype) by BVS, NAIF/JPL, August 11, 1997
   
      The frame definitions were changed to reflect correct 
      transformation sense specified by FRAMES.REQ document
      released in SPICE toolkit N0047. 
   
   Version 1.0 (prototype) by BVS, NAIF/JPL, April 16, 1997


   Spacecraft frame definitions. Required to support automatic 
   frame transformations. Two frames are defined for NEAR s/c:

      - s/c frame (or s/c technological frame);
      - s/c prime frame; rotated -135 degrees around Z 
        relative to the s/c frame;
      
   Orientation of the first frame is provided in CK files relative 
   to some inertial or non-inertial frame; orientation of the second 
   frame is a constant from the first frame offset specified in 
   the frame definition.
   
   Note that these definitions are duplicated in IK files for all 
   other NEAR instruments.
   
   Note that angles in the frame definitions are specified for "from
   instrument to base (relative to) frame" transformation.

\begindata

   FRAME_NEAR_SC_BUS_PRIME  = -93000
   FRAME_-93000_NAME        = 'NEAR_SC_BUS_PRIME'
   FRAME_-93000_CLASS       = 3
   FRAME_-93000_CLASS_ID    = -93000
   FRAME_-93000_CENTER      = -93
   CK_-93000_SCLK           = -93
   CK_-93000_SPK            = -93

   FRAME_NEAR_SC_BUS        = -93100
   FRAME_-93100_NAME        = 'NEAR_SC_BUS'
   FRAME_-93100_CLASS       = 4
   FRAME_-93100_CLASS_ID    = -93100
   FRAME_-93100_CENTER      = -93
   TKFRAME_-93100_SPEC      = 'ANGLES'
   TKFRAME_-93100_RELATIVE  = 'NEAR_SC_BUS_PRIME'
   TKFRAME_-93100_ANGLES    = ( -135.0, 0.0, 0.0 )
   TKFRAME_-93100_AXES      = (    3,   2,   1   )
   TKFRAME_-93100_UNITS     = 'DEGREES'

\begintext

   XRS instrument frame definition. Required to support automatic 
   frame transformations. Orientation of this frame is a constant 
   offset from s/c prime frame specified in the frame definition.
   
   Note that angles in the frame definitions are specified for "from
   instrument to base (relative to) frame" transformation.

\begindata

   FRAME_NEAR_XRS           = -93003
   FRAME_-93003_NAME        = 'NEAR_XRS'
   FRAME_-93003_CLASS       = 4
   FRAME_-93003_CLASS_ID    = -93003
   FRAME_-93003_CENTER      = -93
   TKFRAME_-93003_SPEC      = 'ANGLES'
   TKFRAME_-93003_RELATIVE  = 'NEAR_SC_BUS_PRIME'
   TKFRAME_-93003_ANGLES    = (  0.0313,   -0.6588,  0.0 )
   TKFRAME_-93003_AXES      = (   3,        2,        1 )
   TKFRAME_-93003_UNITS     = 'DEGREES'


\begintext
   
   Instrument FOV shape/orientation definitions. Conform to 
   specification in the header of the GETFOV subroutine. 

   FOV boundaries are defined assuming that:
   
    - FOV has circular shape;
    - angular diameter of the circle is 5 degrees;
    - boresight vector intersects FOV exactly in the center of 
      the circle;

\begindata


   INS-93003_FOV_FRAME            = 'NEAR_XRS'
   INS-93003_FOV_SHAPE            = 'CIRCLE'
   INS-93003_BORESIGHT            = ( 
                             1.0   0.0   0.0 
                                    )
   INS-93003_FOV_BOUNDARY_CORNERS = ( 
                             1.0   0.0   0.043660942909
                                    )
   
\begintext