STEREO/HET/SIT Configuration Tracking Form


To be filled in by configuration manager:


Tracking Number:  00029     Date Received:   09/21/05



To be filled in by initiator:


Software Type:    Flight Software                   Instrument Name:    SIT


Version Name:  20050908  (Build 1.3)         Type of Action:   New Feature

Initiator's Name: Glenn Mason       Date Initiated:  09/21/05



To be filled in by initiator:


Description of action(s)/problems(s):

New tables were provided for the fm1 and fm2 units with creation dates of 9/1/05 and 9/6/05, respectively.  These tables were intended to
reflect the actual energy calibrations of the instrument electronics and changes in the assignment of matrix rates and beacon rates.   After
loading the tables on S/C A and B stimulator tests revealed that the matrix rate lookup table was empty.  This problem was traced to the
program that generates the tables;  the program in fact generated the correct table, but in the process of writing out the table to the disk
file, an empty array was used instead of the array with the table.  Thus, the checks carried out in the program showed the table to be
correct, however the written out table was empty.

Fixing the empty array mistake was simple, but it was also decided to modify the checking procedure to rule out this kind of problem.  This
was accomplished by separating the table generating and file writing functions from the checking functions, by splitting up the program. 
Now, the file for S/C load is written out by the first program.  The second then reads the disk file and then precedes with the checks
performed before.  This ensures that the checks performed pertain to the files to be uploaded.


To be filled in by Programmer:


Software Version Name:    200500922 (Build 1.4)


Programmer(s) Name:        T. Nolan


Date Completed:       09/22/05

New Tables:             fm1:  generated 9/22/05      checksum lower 24 bits (hex):  5F96DA hex
                                fm2:  generated 9/22/05      checksum lower 24 bits (hex):    542BC6 hex                                            


Comments:    New tables were added to the SIT_FSW20040903 binaries, no coding changes were made.   The software version on the HK will still read 0903.   There are now 2 different tables, one for each flight model, therefore the flight code binaries will now be different and can be distinguished by the table checksums mentioned about that are contained in the HK packet.

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