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MEX SCLK Files
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Last update: 22 MAR 2004
This "aareadme.txt" file describes the contents of the KERNELS/SCLK
directory of the MEX SPICE data server. It also provides the file
naming conventions used for the MEX SCLK kernels, and it provides
identification of the most current version of SCLK files.
SCLK files are created from the information contained in the ESOC's DDID
Time Correlation Packets.
All SCLK files (*.TSC) 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. [Ref 4b]
Contact Jorge Diaz del Rio (jdiaz@rssd.esa.int) or Joe Zender
(Joe.Zender@esa.int) if you have any questions.
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References
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1. Data Delivery Interface Document (DDID) Issue B5 (MEX-ESC-IF-5003)
27 Mar 2003
2. SCLK Required Reading. NAIF Document No. 222.02 06 Oct 1999
3. Auxiliary Data Conversion into SPICE Kernels and Distribution.
(MEX-EST-PL-10210)
4. Selected SPICE Tutorials from the NAIF server:
ftp://naif.jpl.nasa.gov/pub/naif/toolkit_docs/Tutorials/office/individual_docs/
a) SCLK Tutorial 13_lsk_and_sclk.ppt
b) Porting Kernels Tutorial 09_porting_kernels.ppt
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Mars Express SCLK Directory Structure
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aareadme.txt Text file describing the directory structure, the naming
conventions for the SCLKs, and the current version(s) of
each SCLK type.
former_versions Subdirectory that contains obsolete versions of the
SCLK files that have been updated in the Current SCLK
Kernels Set, and fake SCLK files used before the creation
of real ones.
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MEX Spacecraft SCLK Naming Covention MEX_yymmdd_[spec].TSC
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token description
------------ --------------------------------------------------
yymmdd File release date.
[spec] Data type specification Identifier:
STEP -- real SCLK files
FAKE -- special fake SCLK files
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Current SCLK Kernels Set
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Name Comments
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MEX_yymmdd_STEP.TSC This file is a SPICE spacecraft clock (SCLK) kernel
containing information required for MEX spacecraft
on-board clock to UTC conversion. This file provides the
same time information that the Time Correlation packets
released via DDS, with the exception of 60 seconds before
the starting time of each packet, during which the clock
rate was sightly adjusted to make the correlation
function continuous. For further discussion in this
topic see [Ref 3] This file was released on yymmdd.