Latest revision  4 March 1997

TJD 10510 = March 3, 1997

At TJD/SoD 10510/49436, the GRO attitude control system was turned off
and the solar arrays were moved to a better position.  This allowed the
spacecraft orientation to drift up to 6 degrees away from the desired
attitude.  At SoD 50502, the spacecraft was back at the original desired
orientation after the GRO attitude control system had been turned on.
The entire interval occurred during a data gap (as if during a normal
reorientation maneuver).  (A maneuver time was even reported in the 
daily summary report.)  As far as can be determined, no data were
received that had been obtained during the attitude drift interval
in the data gap---including not only DISCLA, DISCSP, CONTINUOUS, and 
HKG data which are transmitted in real time, but also burst-type, PSR, 
HER, and SHER data which could have been obtained at a time earlier 
than when they were transmitted.

Therefore, except for the addition of quality flag 54 for the interval
     TJD/SoD 10510/49436 - 10510/50502, 
the attitude drift is being ignored.  The single observing plan record
for the four-week interval including TJD 10510 is not being split into
two separate records.