ACE Weekly 12/08/2006 - 12/14/2006 A latchup of the S3DPU occurred on Day 347 (12/13/2006) at 10:08:40z (Ref AR#S06-0013). SWICS/SWIMS recovery procedures were executed on Thursday 12/14/2006. S3DPU patch reload still needs to be scheduled. All other ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude SK-42 Date 12/13/2006 12/13/2006 DOY 347 2006 347 2006 Thrusters 2R 4R- 4R+ 3A 4A Duration 7:50 min 23.952 sec Start 17:11:47z 18:49:01z Stop 17:19:37z 18:49:25z StartHGA -2.49 deg 5.68 deg StopHGA 5.68 deg 5.68 deg Firing 40 pulses Continuous FinalSCMass 1394.062lbs 1393.974lbs The next attitude maneuver is scheduled for Thursday, 12/21/2006. ============================================================================ OCRs: DOY 348 (12/14/2006) 1902-1913z SWX/SWM-033 Part A SWICS/SWIMS volatile parameters restored after S3DPU latchup on DOY 347 (12/13/2006) at 10:08:40z. Part B of the OCR is for reloading S3DPU patches. We are waiting for Mark Popecki to schedule reloading the S3DPU patches. OCR CRIS-011 is scheduled for Friday DOY 349 (12/15/2006) to turn back on the Image Intensifier. OCR SEP-110 is tentatively scheduled to start on Wednesday 12/20/2006 (DOY 354) in conjunction with the attitude maneuver scheduled for Thursday 12/21/2006 (DOY 355). Sepica will be power-cycled to try to induce a gas valve to open. This may be need to be rescheduled to accommodate reloading the S3DPU patches. ============================================================================ Activities: RIONET - JPL's SFG is successfully flowing telemetry to String 3 on the RIONet. Testing and configuration continues. String 2 is tentatively scheduled to be switched to RIONet in January 2007. Space Link Extension (SLE) - ACE SLE version 2.1 was delivered to the Library on April 28, 2006. Installation in the ACE MOC will not occur until after the MOC is converted to the RIONET. With DSN's limited available time and the number of station anomalies, it was difficult this week to capture all SSR data. Extra effort was put forward due to the value of the recent solar flare data. Aside from the 31 second SSR failover on DOY 345, all data was captured. The X-class solar flares on DOY 339 1035z and DOY 347 0240z resulted in the following automatic ULEIS shutter motion over the past week. 341-14:45:53 from 6% open to 1% open 344-03:25:20 from 1% open to 6% open 344-10:34:08 from 6% open to 25% open 345-05:54:40 from 25% open to 100% open 347-03:59:28 from 100% open to 25% open 347-04:14:24 from 25% open to 6% open 347-04:31:28 from 6% open to 1% open ============================================================================ Anomalies: DOY 343 (12/09/2006) S-ACE-0122 (G06-0113) - D27 No Ranging DSS-27 was unable to provide ranging for the entire support. DR# G107261 IMPACT: Minimal. There were 3 other Goldstone ranging supports between the maneuvers on DOY 339 and DOY 347. DOY 343 (12/09/2006) S-ACE-0123 (G06-0114) - D27 Recurring Antenna Stop Throughout the pass, the antenna stopped tracking due to an emergency stop (DR# G107262). Three brief telemetry outages occurred at 1552z, 1614z and 1715z. The uplink was also lost at 1552z. The FOT requested a resweep to ensure lock on the spacecraft's Receiver B (DR# G107263). Transponder B is not transmitting so Receiver B may be out of lock even with good 2-way. IMPACT: 10 minutes cumulative telemetry loss. Plbk data was automatically redumped. DOY 344 (12/10/2006) S-ACE-0126 (G06-0117) - D27 Red, No Pass Power failure at DSS-27 throughout support. IMPACT: SSR Failover on DOY 345 (12/11/2006). 31 second gap during SSR Failover (09:41:58 - 09:42:28z). No clock calibration reports for DOY 344 or DOY 345. No attitude report for DOY 344. DOY 345 (12/11/2006) S-ACE-0124 (G06-0115) - D27 Late AOS/No Uplink Telemetry delayed 45 minutes due a CW software prelimit when commanded to point. Technicians needed to be dispatched to manually move the antenna out of limits (DR# G107288). After telemetry was available, station informed FOT that uplink was not available due to the power failure the previous day (DR# G107289). DSS-27 was released at 1600z and time was acquired on DSS-45 thanks to GEOTAIL. IMPACT: Unable to downlink all data from full SSR. SSR data was finally caught up after DOY 347. DOY 345 (12/11/2006) S-ACE-0125 (G06-0116) - ROBOTT/C&C Froze ROBOTT froze after procedure S_OPS_PLBK_COMPLETE completed (EOT-5minutes). RTMON restart not performed since 5 minutes before End of Track. CDSID#00021192 IMPACT: This is a recurring issue that the ROBOTT developers are aware of. Procedure G_ACEDOWN not performed. DOY 347 (12/13/2006) S-ACE-0128 (G06-0118) - ACETLANPC failure ACETLANPC voltage regulator failure. Hardware maintenance notified. IMPACT: This PC receives DSN's monitor data and provides duplicate archiving of critical data. DOY 347 (12/13/2006) S-ACE-0127 (S06-0013) - S3DPU Latchup S3DPU Latchup occurred at 10:08:40z. SSDLUCNT incremented from 2 to 3. Previous occurrences DOY 137 2002 11:20:51z SSDLUCNT = 1 DOY 137 2005 19:51:57z SSDLUCNT = 2 SWICS and SWIMS recovery (OCR SWX/SWM-033) completed DOY 348 (33 hours after latchup). We are waiting for Mark Popecki to schedule reloading the S3DPU patches. IMPACT: Patches and Rate tables need to be reloaded.