SOHO DAILY REPORT Operations Day -- 348 1995 Mission Day 13 SOHO FLIGHT OPERATIONS TEAM, NASA/GSFC Ref. #: SH-FOT-DR-951215 =========================================================== PASS #1 Madrid DSS66 08:40:00 13:36:00 PASS #2 Goldstone DSS16 15:35:00 23:07:00 PASS #3 Canberra DSS46 22:27:00 07:06:00 Pass#1 Summary --------------------- Anomalies: Pass Activties: - SSR SEF resets (before and after SSR dump) -Dump SSR -SSR to record Pass#2 Summary (combined long pass) --------------------- Anomalies: - 15:55 Start of MDI delayed load uplink -- Received numerous S/W anomaly messages during uplink -- Uplink was halted and investigation ensued -- Modify BARM timeout to 60 seconds and bit bias to 2000 -- Load uplinked successfully during later pass - SSU SEU etected at 16:15 -- Guide star was lost -- When the anomaly occurred the trigger criteria was set at 2 SEU counts per 15 seconds -- Performed CS-11: SSU-SEU recovery script - ACU Rejects Manual Starmapping commands/SSU Reset CMD -- Tried to cmd manual star map after 1st slew to acquire Guide Star -- Command was rejected at ACU twice(cmd failed once and resent) -- Tried sending SSU Reset CMD that also failed -- All commands sent were verified w/ Matra experts prior to send - SSU SEU etected at 349/0434 -- Guide star was lost -- When the anomaly occurred the trigger criteria was set at 2 SEU counts per 1 second -- Performed CS-11: SSU-SEU recovery script -- Star-mapping download delayed to later pass for FDF support Activity Summary: -SSR playback -Perform mini-slew to nominal roll attitude (star-mapping failed after slew) - Performed 2nd slew to nominal roll attitude(successful) - Performed roll trim (14 arcsec) to nominal roll attitude -Competed Post-Momentum Management sequence - Return to normal mode -CELIAS turn-on sequence executed -Cleared out COBS Anomaly Table -OCD#102, reset the SEU timeout to 2/1sec -SSR SEF resets (0014z) -Dumped group 15 -SSR to record mode -OCD*s 102, 82, 99 completed --End of report--