PHSRM CK Files
===========================================================================

   This file was last modified on October 12, 2010 by A. Ledkov and B.
   Semenov.


Summary
--------------------------------------------------------

   This "aareadme.txt" file describes the contents of the "kernels/ck"
   directory of the PHSRM SPICE data server. It also provides the file
   naming conventions used for the PHSRM CK kernels, instructions for
   getting additional information about a CK file, and contact
   information for PHSRM CK producers.


Directory Contents
--------------------------------------------------------

   This directory contains the following files and subdirectories:

 phsrm_sc_test2_111108_130214_v00.bc   CK file containing example PHSRM
                                       spacecraft orientation data
                                       provided by NPOL in March 2011,
                                       covering cruise from Earth to
                                       Mars, three-day orbit around
                                       Mars, observation orbit around
                                       Mars, and quasi synchronous
                                       orbit around Mars.

      former_versions                  Subdirectory containing obsolete
                                       versions of the CK files and
                                       other files used for creating
                                       CK.

      aareadme.txt                     This file.

      aareadme_ru.txt                  This file in Russian.


File Naming Conventions
--------------------------------------------------------

   The PHSRM spacecraft orientation CKs provided in this directory are
   named as follows

      phsrm_sc_TYPE_YYMMDD_YYMMDD[_NOTE][_vNN].bc

   where 

      TYPE is the data type (test, nom, pred, rec)

      YYMMDD are the coverage start and stop date

      _NOTE is the optional note

      _vNN is the optional version (e.g. 00, 01)


   The instrument orientation CKs provided in this directory are
   named as follows

      phsrm_INST_TYPE_YYMMDD_YYMMDD[_NOTE][_vNN].bc

   where 

      INST is the instrument name or acronym

      TYPE is the data type (test, nom, pred, rec)

      YYMMDD are the coverage start and stop date

      _NOTE is the optional note

      _vNN is the optional version (e.g. 00, 01)


Getting Additional Information About an CK File
--------------------------------------------------------

   The contents and time span covered by any CK file may be easily
   determined using the "ckbrief" utility program available in all copies
   of the SPICE Toolkit. Example of usage:

      $ ckbrief <ck_file_name> <lsk_file_name> <sclk_file_name>

   Descriptive information about how/why/when an CK file was created
   is usually available in the "comment area" of the file. This may be
   viewed using the "commnt" utility program available in all copies of
   the SPICE Toolkit. Use the "-r" option to read the comments.
   Example:

      $ commnt -r <ck_file_name>
 

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

   If you have any questions about PHSRM CK files, contact

      A. Ledkov / IKI              aledkov@iki.rssi.ru
      A. Yanin  / NPO Lavochkina   yanin@laspace.ru
      A. Tuchin / IPM              tag@kiam1.rssi.ru


End of aareadme.txt