 
 
Mars Global Solar Array / MAG Structures SPK File
================================================================================
 
   This SPK file (FK) contains location of various MGS solar array structures
   and MAG sensors with respect to each other.
 
 
If You're in a Hurry
----------------------------------------------------------------------
 
   In case you are not interested in details and just looking for the right
   NAIF code of a particular MAG sensor IT to use it in a call to SPKEZ,
   here is the list:
 
         -94051      +Y MAG Sensor ID;
         -94052      -Y MAG Sensor ID;
 
 
Version and Date
--------------------------------------------------------
 
   Version 1.1 -- April 8, 1999
 
      Added comments.
 
   Version 1.0 -- August 8, 1997
 
      Initial Release.
 
 
Contact Information
----------------------------------------------------------------------
 
   Boris V. Semenov, NAIF/JPL, (818)-354-8136, bsemenov@spice.jpl.nasa.gov
 
 
References
----------------------------------------------------------------------
 
   1. Complete Set of MGS Mechanical Drawings, 1997.
 
   2. ``Frames Required Reading''
 
   3. ``SP-Kernel Required Reading''
 
   4. ``C-Kernel Required Reading''
 
 
Related SPICE Kernels
----------------------------------------------------------------------
 
   Descriptions/definitions from the MAG/ER Instrument Kernel (IK) file
   and from the MGS Spacecraft Clock Coefficients (SCLK) file are required
   in order to understand objects and frames with respect to which the
   locations are defined in this SPK file.
 
 
MGS Solar Array/ MAG Sensor Location Diagram
----------------------------------------------------------------------
 
   The diagram below illustrates relative locations of the solar array
   gimbal and yoke amd MAG sensors. Dimensions are given in meters and
   inches:
 
   -Y MAG         yoke    gimbal    s/c    gimbal   yoke          +Y MAG
      |              |        |       |       |        |              |
      |   3.817m     | 0.729m |0.669m | 0.669m| 0.729m |     3.817m   |
      |     or       |   or   |   or  |   or  |   or   |       or     |
      |  150.285"    |  28.7" | 26.33"| 26.33"|  28.7" |    150.285"  |
      |<------------>|<------>|<----->|<----->|<------>|<------------>|
      |              |        |    ___|____   |        |              |
      |              |        V   /   |   /|  V        |              |
      |  ____________|_ ______   /____|__/ |      _____|__ ___________|__
      V /            V//      |  |    |  | |     /     V //           V /
       /    -Y Solar //       |  |    |  | |   /        // +Y Solar    /
      @       Array /@        @--|    |  | ---@        @/   Array     @ -----
     /             //       /    |    |  | |  |       //             /   A
    /_____________//______/      |    |  | |  |______//_____________/    |0.934m
                                 |____V__|/                              |36.77"
                                    /   \                                V
                                   /__@__\                       ------------
 
 
Coordinates
----------------------------------------------------------------------
 
   This table contains coordinates of various solar array structures
   and MAG sensors with respect to each other (refer to the diagrams
   above for clarification). Distances are given in kilometers and the
   coordinates from this table are used below is PINPOINT keywords:
 
      ID     CENTER   FRAME                   X,km       Y,km        Z,km
   -------  -------  --------------------  ---------  ----------  ----------
   -94001   -94      MGS_SPACECRAFT         0.000000,  0.000669,   0.000934
   -94002   -94      MGS_SPACECRAFT         0.000000, -0.000669,   0.000934
   -94051   -94901   MGS_+Y_SOLAR_ARRAY     0.000000,  0.003817,  -0.000013
   -94052   -94902   MGS_-Y_SOLAR_ARRAY     0.000000,  0.003817,  -0.000013
   -94901   -94001   MGS_LEFT_SOLAR_ARRAY   0.000000,  0.000729,   0.000000
   -94902   -94002   MGS_RIGHT_SOLAR_ARRAY  0.000000,  0.000729,   0.000000
 
 
Data section of the file.
----------------------------------------------------------------------
 
   \begindata
 
      SITES = (   'MGS_+Y_GIMBAL_ORIGIN',
                  'MGS_-Y_GIMBAL_ORIGIN',
                  'MGS_+Y_YOKE_ORIGIN',
                  'MGS_-Y_YOKE_ORIGIN',
                  'MGS_MAG_+Y_SENSOR',
                  'MGS_MAG_-Y_SENSOR'    )
 
      MGS_+Y_GIMBAL_ORIGIN_FRAME   = 'MGS_SPACECRAFT'
      MGS_+Y_GIMBAL_ORIGIN_IDCODE  = -94001
      MGS_+Y_GIMBAL_ORIGIN_XYZ     = ( 0.000000,  0.000669, 0.000934  )
      MGS_+Y_GIMBAL_ORIGIN_CENTER  = -94
 
      MGS_-Y_GIMBAL_ORIGIN_FRAME   = 'MGS_SPACECRAFT'
      MGS_-Y_GIMBAL_ORIGIN_IDCODE  = -94002
      MGS_-Y_GIMBAL_ORIGIN_XYZ     = ( 0.000000, -0.000669, 0.000934  )
      MGS_-Y_GIMBAL_ORIGIN_CENTER  = -94
 
      MGS_+Y_YOKE_ORIGIN_FRAME     = 'MGS_LEFT_SOLAR_ARRAY'
      MGS_+Y_YOKE_ORIGIN_IDCODE    = -94901
      MGS_+Y_YOKE_ORIGIN_XYZ       = ( 0.000000, 0.000729, 0.000000 )
      MGS_+Y_YOKE_ORIGIN_CENTER    = -94001
 
      MGS_-Y_YOKE_ORIGIN_FRAME     = 'MGS_RIGHT_SOLAR_ARRAY'
      MGS_-Y_YOKE_ORIGIN_IDCODE    = -94902
      MGS_-Y_YOKE_ORIGIN_XYZ       = ( 0.000000, 0.000729, 0.000000 )
      MGS_-Y_YOKE_ORIGIN_CENTER    = -94002
 
      MGS_MAG_+Y_SENSOR_FRAME      = 'MGS_+Y_SOLAR_ARRAY'
      MGS_MAG_+Y_SENSOR_IDCODE     = -94051
      MGS_MAG_+Y_SENSOR_XYZ        = ( 0.000000, 0.003817, -0.000013 )
      MGS_MAG_+Y_SENSOR_CENTER     = -94901
 
      MGS_MAG_-Y_SENSOR_FRAME      = 'MGS_-Y_SOLAR_ARRAY'
      MGS_MAG_-Y_SENSOR_IDCODE     = -94052
      MGS_MAG_-Y_SENSOR_XYZ        = ( 0.000000, 0.003817, -0.000013 )
      MGS_MAG_-Y_SENSOR_CENTER     = -94902
 
   \begintext
 
