KPL/IK

MAVEN Antennae Instrument Kernel
===============================================================================

   This Instrument Kernel (IK) file contains FOV parameters for MAVEN 
   antenna instrument.


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

   Version 1.0 -- April 24, 2014 -- Boris Semenov, NAIF


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

   1. Kernel Pool Required Reading

   2. GETFOV, getfoc_c, cspice_getfov headers

   3. MAVEN FK file, latest version

   4. MAVEN antennae FOV sizes, e-mail from Peter MacMillin, LMCO, 
      April 20, 2015


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

   Boris Semenov, NAIF, 818-354-8136, Boris.Semenov@jpl.nasa.gov


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

   This file is used by the SPICE system as follows: programs that make
   use of this kernel must ``load'' the kernel, normally during program
   initialization. The SPICE routine FURNSH loads a kernel file into
   the pool as shown below.

      CALL FURNSH ( 'frame_kernel_name; )    -- FORTRAN
      furnsh_c ( "frame_kernel_name" );      -- C
      cspice_furnsh, frame_kernel_name       -- IDL
      cspice_furnsh( 'frame_kernel_name' )   -- MATLAB

   Once the file has been loaded, the SPICE routine GETFOV (getfov_c in
   C, cspice_getfov in IDL and MATLAB) can be used to retrieve FOV
   parameters for a given instrument or structure.
 
   This file was created and may be updated with a text editor or word
   processor.


Naming Conventions
----------------------------------------------------------

   All names referencing values in this IK file start with the
   characters `INS' followed by the NAIF MAVEN ID number (-202)
   followed by a NAIF three digit ID code for antenna or one of its
   detectors or components. This is the full list of names and IDs
   described by this IK file:

      MAVEN_HGA                       -202010
      MAVEN_LGA_AFT                   -202040
      MAVEN_LGA_FWD                   -202030
      MAVEN_UHF                       -202020

   The remainder of the keyword name is an underscore character
   followed by the unique name of the data item. For example, the
   -202010 boresight direction provided as a part of its FOV definition
   is specified by:

      INS-202010_BORESIGHT

   The upper bound on the length of the name of any data item is 32
   characters.
 
   If the same item is included in more than one file, or if the same
   item appears more than once within a single file, the latest value
   supersedes any earlier values.


Mounting Alignment
--------------------------------------------------------

   Refer to the latest version of the MAVEN Frames Definition Kernel
   (FK) [3] for the MAVEN structures reference frame definitions and
   mounting alignment information.


Instrument FOV Definition(s)
----------------------------------------------------------

   This section defines the following FOVs for MAVEN antennae (from [4]):

      ID       SHAPE      FRAME                  FULL SIZE    BSIGHT
      -------  --------   ---------------------  -----------  ------
      -202010  CIRCLE     MAVEN_HGA                 1.04 deg    +Z
      -202040  CIRCLE     MAVEN_LGA_AFT           156.0  deg    +Z
      -202030  CIRCLE     MAVEN_LGA_FWD           156.0  deg    +Z
      -202020  CIRCLE     MAVEN_UHF               120.0  deg    +Z

   The FOVs are defined in this data block.

      \begindata

      INS-202010_FOV_CLASS_SPEC       = 'ANGLES'
      INS-202010_FOV_SHAPE            = 'CIRCLE'
      INS-202010_FOV_FRAME            = 'MAVEN_HGA'
      INS-202010_BORESIGHT            = ( 0.0, 0.0, 1.0 )
      INS-202010_FOV_REF_VECTOR       = ( 1.0, 0.0, 0.0 )
      INS-202010_FOV_REF_ANGLE        = ( 0.52 )
      INS-202010_FOV_ANGLE_UNITS      = ( 'DEGREES' )

      INS-202020_FOV_CLASS_SPEC       = 'ANGLES'
      INS-202020_FOV_SHAPE            = 'CIRCLE'
      INS-202020_FOV_FRAME            = 'MAVEN_UHF'
      INS-202020_BORESIGHT            = ( 0.0, 0.0, 1.0 )
      INS-202020_FOV_REF_VECTOR       = ( 1.0, 0.0, 0.0 )
      INS-202020_FOV_REF_ANGLE        = ( 60.0 )
      INS-202020_FOV_ANGLE_UNITS      = ( 'DEGREES' )

      INS-202030_FOV_CLASS_SPEC       = 'ANGLES'
      INS-202030_FOV_SHAPE            = 'CIRCLE'
      INS-202030_FOV_FRAME            = 'MAVEN_LGA_FWD'
      INS-202030_BORESIGHT            = ( 0.0, 0.0, 1.0 )
      INS-202030_FOV_REF_VECTOR       = ( 1.0, 0.0, 0.0 )
      INS-202030_FOV_REF_ANGLE        = ( 78.0 )
      INS-202030_FOV_ANGLE_UNITS      = ( 'DEGREES' )

      INS-202040_FOV_CLASS_SPEC       = 'ANGLES'
      INS-202040_FOV_SHAPE            = 'CIRCLE'
      INS-202040_FOV_FRAME            = 'MAVEN_LGA_AFT'
      INS-202040_BORESIGHT            = ( 0.0, 0.0, 1.0 )
      INS-202040_FOV_REF_VECTOR       = ( 1.0, 0.0, 0.0 )
      INS-202040_FOV_REF_ANGLE        = ( 78.0 )
      INS-202040_FOV_ANGLE_UNITS      = ( 'DEGREES' )

      \begintext

End of the IK file.