[IGSMAIL-7122] IGV (IGS GLONASS Ultra-rapid) sp3 file format problem

[Kevin Choi - NOAA Federal]

Dear IGV product users,

IGV is an experimental product that contains GPS+GLONASS Ultra-rapid orbits
every 6 hours.  Earlier today, one of our colleagues in German Aerospace
Center (Dr. Hauschild) notified the format issues in the sp3c file format.

All epoch lines in the file read (underscore (_) denotes whitespace):
*__2015_7_12__6__0_0.00000000
                  ^
with only one pre-decimal space for the second.  But the epoch line in the
SP3c format should have two digits for the seconds, so it should look like
*__2015_7_12__6__0__0.00000000
                  ^^
I have fixed the source code to write the correct format.  The corrected
format SP3 files will be delivered beginning wk1853_1_18.

Affected IGV files are all IGV SP3 files since GPS week 1601_4_06. Only
timetag lines are affected (no orbit or clock was modified).  All previous
submissions (6917 files) are replaced in CDDIS.

If you have any issues regarding this note, please let me know.


Best Regards,


Kevin Choi

IGS.ACC at NOAA.GOV
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