ACE Weekly 05/03/2017 05/09/2017 All ACE spacecraft subsystems are performing as expected. ========================== ========================== ====================== Attitude/Orbit: Type Attitude Date 5/09/2017 DOY 129 2017 Thrusters 2R 4R+ 4R- Duration 3:37 minutes Start 16:08:46z Stop 16:12:23z ra,decStart 47.60,26.92 ra,decStop 47.68,29.88 ra,decExpect 47.70,30.25 Deviation 0.37 deg (-11.1%) HGAStart -5.83 deg HGAStop -8.68 deg SunStart 9.57 deg SunStop 12.52 deg SpinStart 4.9763 rpm SpinStop 4.9773 rpm Nutation 0.14 deg Firing 18 pulses FuelUsed 0.0598 lbm FuelRemain 83.341 lbm FinalSCMass 1317.601 lbm The deviation percentage is high because the maneuver was abnormally small. Upcoming Maneuver Schedule: - Attitude Maneuver: Tuesday, 05/16/2017 - Stationkeeping (SK-85): TBD ========================== ========================== ====================== OCRs: Update: Virtual MMOC (vMMOC) Status - The NEN team updated their configuration to deliver the short term WS1 schedule to the virtual MMOC systems. Short term WS1 schedule delivered daily, effective 5/09/2017. - No further dependencies on physical MMOC systems for ACE Operations. ========================== ========================== ====================== Activities: Data Capture: 100% DOY 121-127 2017 ========================== ========================== ====================== Anomalies: 05/04/2017 DOY 124 S-ACE-93-CTT-13 DSN Problem D15 - Goldstone Complex DSN notified FOT RFI impacting D15=92s ability to maintain lock on downlink= . Station reported =93the affected assembly was RRT2 (Receiver, Ranging, and Telemetry Processor 2) from 2017/124/18:50 to 2017/124/19:28 (38 mins). Station was seeing RS/FS Lock Status Changed alarm and changes in the SNT during this time frame. Goldstone Frequency and Airspace Coordination notified." (DR# G118098). IMPACT: RFI impacted 38 minutes of playback. Post-pass analysis showed 26= gaps, totaling 246 seconds. All gaps were recovered during re-dumps on th= e following pass. ========================== =================== 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