Latest revision  9 March 1999

Triggers 7451-7459 with bad SOLFLG due to flight software upset.

TJD 11243-11245 = March 6-8, 1999

A flight software upset (bit flip) occurred at or shortly before
 TJD/SoD 11243/32699.
The affected word was at hex address 0CB0; the contents had been
changed from the correct hex value 0720 to the bad value 0721.

The upset occurred in an area of the software dealing with the
SOLFLG value (which no longer has anything to do with the solar
flare flag but is used to decide whether a trigger location can
be seen by OSSE).  The only obvious effect was that the SOLFLG
value for triggers 7451-7454 (on TJD 11243), 7455 (on TJD 11244),
and 7456-7459 (on TJD 11245) was 65535 (same as -1, i.e., all
16 bits are set) instead of the more common 64 (or another small
value if in the field of view of OSSE).

The problem was fixed by sending a command (BRTFIXP2) to the 
spacecraft at
 TJD/SoD 11245/63597
to change the contents of the altered word back to the original
correct value.