KPL/IK

MARIE Instrument kernel
===========================================================================  
 
   This instrument kernel (I-kernel) contains the Mars Odyssey 2001 
   Mars Radiation Environment Experiment (MARIE) FOV definition and other
   instrument parameters.
 
 
Version and Date
---------------------------------------------------------------------------
 
   Version 1.0 -- March 6, 2001 -- Boris Semenov, NAIF/JPL
 
      Initial release.
      
 
References
---------------------------------------------------------------------------
 
   1. ``Kernel Pool Required Reading''

   2. ``C-kernel Required Reading''

   3. ``MARIE ICD'', MSP01-98-0016, June 23, 1999

   4. M'01 Frames Definition Kernel (FK), latest version.

   5. MARIE Information Sheet, JPL M'01 Odyssey Web Site,
      http://mars.jpl.nasa.gov/2001/orbiter/orbiter-marie.jpg
      March 2001.


Implementation Notes
--------------------------------------------------------
 
   User programs that need I-kernel data must `load' the I-kernel file, 
   normally during program initialization. 
   
   Loading the kernel using SPICELIB routine FURNSH causes the data items 
   and their associated values present in the kernel to become associated 
   with a data structure called the ``kernel pool''. Then a user's program 
   can obtain the value(s) for any data item using the SPICELIB routines 
   GDPOOL, GIPOOL and GCPOOL. See [1] for details.
   
   This file was created and can be updated with a text editor or word
   processor.

 
Naming Conventions
--------------------------------------------------------
 
   All names referencing values in this I-kernel start with the characters
   `INS' followed by the NAIF M'01 spacecraft ID number (-53) followed by
   the NAIF three digit MARIE instrument reference number (040).

   The remainder of the name is an underscore character followed by the 
   unique name of the data item. For example, the boresight of the 
   MARIE FOV is specified by

      INS-53040_FOV_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 then one file, or if the same item
   appears more than once within a single file, the latest value supersedes
   any earlier values.
   

MARIE Overview
--------------------------------------------------------

   From [5]:
   
      "OBJECTIVES:
         
         Measure the accumulated absorbed dose and dose rate 
         in tissue as a function of time, determine the 
         radiation quality factor, determine the energy 
         deposition spectrum from 0.1 keV/micron to 1500
         keV/micron, and separate the contribution of 
         proton, neutrons, and HZE particles to these 
         quantities

      SCIENCE TEAM:

         PI is Gautam Badhwar (JSC).

      SUPPLIERS:

         JSC. Sub-contractors are Lockheed Martin and Battelle
         Pacific Northwest.

      HARDWARE:

         Energetic particle spectrometer with two 24 x 24 
         position sensitive detectors followed by two 
         proportional counters 1.78 dia x 1.78 cm. (TEPC &CPC),
         56 deg FOV, 60 MB of flash linear memory, and an Intel
         processor. Measures the linear energy transfer range 
         of 0.1 to 1500 keV/micron in 512 channels.

      INTERFACE:

         Mass = 4.0 kg. Power = 6 W. Volume = 10.2 x 17.8 x 
         29.2 cm. Data rate <8 Mbits per day over RS-422 low 
         speed data line. Contains 2 - 0.9 microCurie alpha
         sources and 2 - 40 torr propane vessels (proportional
         counters.)"


MARIE Instrument Frame and Mounting Alignment
--------------------------------------------------------

   MARIE instrument frame is illustrated by this diagram: 

                       _______________ HGA
                       \             /
                   ..   `._________.'  
    Science        || ._______________.Science deck
     Orbit         || |       ^+Xsc   |
   Velocity        || |       |       |
      ^.           || |       |      ^+Xmarie .'   MARIE FOV 
        `.         || |       |+Zsc /||     .'   (68 deg cone)
          `.       ||@| <-----o ..'._|_.  .'
                   || +Ysc     /   | | |.'
                   || |     _.' <----o o-------->  MARIE FOV 
                   || |  _.'  +Ymarie _.`.         boresight
            Solar  || ..'_____________.   `.
            Array  ..       Bottom Deck     `.
                                              `.
                         /
                        /                            -------->
                       /                            Aerobraking 
                      V Nadir                        Velocity

   Actual keywords defining MARIE instrument frame and incorporating 
   MARIE mounting alignment information are provided in [4].
       
   
MARIE FOV Definition
--------------------------------------------------------

   MARIE FOV, as defined in [3], is a 68-degree cone centered around 
   -Y axis of the MARIE instrument frame.

   The set of keywords in the data section above defines MARIE FOV
   as a circle with a half-angle of 34 degrees and boresight direction
   along the -Y axis of the MARIE instrument frame.

      \begindata
            
      INS-53040_FOV_FRAME             = 'M01_MARIE'
      INS-53040_FOV_SHAPE             = 'CIRCLE'
      INS-53040_BORESIGHT             = (
                                          0.0000000000000000  
                                         -1.0000000000000000   
                                          0.0000000000000000
                                        )

      INS-53040_FOV_BOUNDARY_CORNERS  = (
                                          0.0000000000000000  
                                         -0.8290375725550400  
                                         +0.5591929034707500
                                         )
      
      \begintext



Platform ID
---------------------------------------------------------------------------
 
   This number is the NAIF instrument ID of the platform on which the
   instrument is mounted.

      \begindata

      INS-53040_PLATFORM_ID  = ( -53000 )
      
      \begintext