ACE Weekly 05/10/2017 05/16/2017 All ACE spacecraft subsystems are performing as expected. ========================== ========================== ====================== Attitude/Orbit: Type Attitude Date 5/16/2017 DOY 136 2017 Thrusters 2R 4R+ 4R- Duration 5:45 minutes Start 18:18:11z Stop 18:23:56z ra,decStart 47.48,29.84 ra,decStop 52.51,32.37 ra,decExpect 52.87,32.39 Deviation 0.28 deg (-5.3%) HGAStart -8.61 deg HGAStop -9.01 deg SunStart 12.01 deg SunStop 13.24 deg SpinStart 4.9771 rpm SpinStop 4.9787 rpm Nutation 0.06 deg Firing 29 pulses FuelUsed 0.0915 lbm FuelRemain 83.250 lbm FinalSCMass 1317.510 lbm Upcoming Maneuver Schedule: - Attitude Maneuver: Tuesday, 05/23/2017 - Stationkeeping (SK-85): TBD ========================== ========================== ====================== OCRs: 05/16/2017 MOCR ACE-382 Authorization to transition Realtime Operations to= the virtual MMOC systems Realtime operations have been performed on the virtual systems since 2/14/2= 017. Now that all the dependencies on physical MMOC systems for ACE Operations h= ave been resolved, NASA Management has approved this MOCR. The virtual MMOC sy= stems are now officially designated operational. ========================== ========================== ====================== Activities: Data Capture: 99.99% DOY 128-134 2017 ========================== ========================== ====================== Anomalies: 05/14/2017 DOY 134 S-ACE-102 ITOS Failed to enable the cmd graph for ACE Pass activities failed to initiate due to command graph error. Automation performed clean up activities following scheduled EOT + 10 minutes. FOT came in to verify cleanup successfully performed and assess SSR Status. FOT worked to obtain additional DSN time. DOY 136 support extended one hou= r. IMPACT: Lost pass; 31 seconds of data loss due to SSR Failover. Delay in = Playback data recovery. 05/15/2017 DOY 135 S-ACE-103 VM Thin Client 01 locked up Following the conclusion of the ACE support, FOT unable to log in to the th= in client (01) logged in to the Prime virtual operations machine (1P). The th= in client screen appeared to be locked up in blank screen saver mode. FOT not= ified SAs to troubleshoot. Switching monitors and video cable did not resolve th= e problem. FOT forced to kill 1P processes from TC4. Thin Client rebooted; however screen timing setting not retained. SAs replaced the thin client 0= 1 with a different one. The FOT successfully logged back in to 1P and config= ured system to support ACE (& Wind) automated operations. IMPACT: Manual intervention needed to configure system for automated opera= tions once thin client issue replaced. 05/16/2017 DOY 136 S-ACE-93-CTT-14 DSN Problem D15 - Goldstone Complex= recurring Fourteen minute telemetry dropout due to power glitch at complex (18:00-18:= 14z). DSN reports =93The PDG - Power Distribution Group were the affected assembl= y. Loss of data due to a glitch in the commercial supplied power. This may be attri= buted to an issue with one of the cross arms on the power poles that supply comme= rcial power to the complex. Notified the appropriate personnel who dispatched per= sonnel to the sites to check on the areas of responsibility. Approval was given to= bring up the power plants, they were on line at 18:13:30 (DR# G118141)". IMPACT: Fourteen minute gap occurred during redump of carryover SSR data. Automation does not perform redumps of carryover SSR dumps. However, pass = supported by FOT for a scheduled attitude maneuver. FOT manually updated s_dumplist = and redumped missing data, thereby preventing ~2.5 hours of data loss. ========================== =================== Jacqueline Maldonado Snell Wind, Geotail and ACE Flight Operations Team Manager Goddard Space Flight Center, Bldg 14 Room N284, Mailstop 428.2 | Greenbel= t, MD 20771 | USA Office: +1 301.286.7072 | Mobile: +1 443.896.8868 | jacqueline.m.snell@= nasa.gov<mailto:jacqueline.m.snell@nasa.gov>