MEX IK Files
  ============

  This "aareadme.txt" file describes the contents of the kernels/ik
  directory of the MEX SPICE data server. It also provides the file naming
  conventions used for the MEX IK kernels, and it provides identification
  of the most current version of each kind of IK file.

  All these IK files are produced manually with the information supplied by
  Mars Express teams describing the science instruments.

  The most detailed description of the data in an IK file is provided in
  metadata included inside the description area of the file. This information
  can be viewed using any text editor program.

  At least a basic knowledge of the SPICE system is needed in order to use
  these kernels. The SPICE toolkit provides versions in Fortran (SPICELIB), C
  (CSPICE), IDL (icy) and Matlab (mice), and the user can choose any one that
  suits him/her.

  The SPICELIB routine FURNSH, CSPICE function furnsh_c, icy and mice routine
  cspice_furnsh load a kernel file into the kernel pool as shown below.

      CALL FURNSH ( 'kernel_name' )
      furnsh_c    ( "kernel_name" );
      cspice_furnsh, 'kernel_name'
      cspice_furnsh( 'kernel_name' )

  In the case when two or more files contain data overlapping in time for a
  given object, for binary kernels, the file loaded last takes precedence.

  If two (or more) text kernels assign value(s) using the '=' operator to
  identical keywords, the data value(s) associated with the last loaded
  occurrence of the keyword are used -all earlier values have been replaced
  with the last loaded value(s).

  All IK files (*.TI) contained in this directory are unix text files. These
  may be used in a non-compatible text environment by using the ASCII mode of
  FTP to port the files.

  Contact

    ESA SPICE Team             spice@sciops.esa.int

  , or

    Alfredo Escalante Lopez    aescalante@sciops.esa.int

  if you have any questions.


Mars Express IK Directory Structure
===================================

  aareadme.txt            This file

  former_versions         Subdirectory that contains obsolete
                          versions of the IK files that have
                          been updated in the Current IK
                          Kernel Set.

  MEX_ASPERA_Vxx.TI       SPICE Kernel (IK) that contains ASPERA
                          geometry parameters.

  MEX_HRSC_Vxx.TI         SPICE Kernel (IK) that contains the
                          High Resolution Stereo Camera (HRSC)
                          and Super Resolution Channel (SRC)
                          camera optics, detector, and FOV
                          parameters.

  MEX_MARSIS_Vvv.TI       SPICE Kernel (IK) that contains MARSIS
                          geometry, optics, detector and FOV
                          parameters.

  MEX_MELACOM_Vvv.TI      SPICE Kernel (IK) that contains MELACOM
                          instrument FOV parameters.

  MEX_OMEGA_Vxx.TI        SPICE Kernel (IK) that contains the
                          OMEGA Visible and Near InfraRed (VNIR)
                          and Short Wavelength InfraRed (SWIR)
                          Sort wavelength (SWIR-S) and Long
                          wavelength (SWIR-L) channel optics,
                          detector, and field-of-view parameters.

  MEX_PFS_Vxx.TI          SPICE Kernel (IK) that contains PFS
                          geometry, optics, detector, and FOV
                          parameters.

  MEX_SPICAM_Vvv.TI       SPICE Kernel (IK) that contains SPICAM
                          geometry parameters for the instrument
                          UV and IR channels.

  MEX_STR_Vvv.TI          SPICE Kernel (IK) that contains the Star
                          Trackers geometry, optics, detector and
                          FOV parameters.

  MEX_VMC_Vvv.TI          SPICE Kernel (IK) that contains VMC
                          geometry, optics, detector and FOV
                          parameters.


-------------------

        This file was last modified on March 22th, 2021. (R. Valles)


End of aareadme file.