ACE Weekly 10/15/2015 - 10/20/2015 All ACE spacecraft subsystems are performing as expected. ======================================================================== Attitude/Orbit: Type Attitude Date 10/20/2015 DOY 293 2015 Thrusters 2R 4R+ 4R- Duration 6:56 minutes Start 13:25:20z Stop 13:32:16z ra,decStart 214.41,-17.50 ra,decStop 219.93,-21.16 ra,decExpect 220.09,-21.38 Deviation 0.27 deg (-3.7%) HGAStart 2.57 deg HGAStop 8.82 deg SunStart 11.99 deg SunStop 18.32 deg SpinStart 5.0269 rpm SpinStop 5.0290 rpm Nutation 0.07 deg Firing 35 pulses FuelUsed 0.1125 lbm FuelRemain 94.8568 lbm FinalSCMass 1329.117 lbm Note: Following the observed nutation of SK-77 (0.81), the FOT is evaluating the initial conditions just prior to SK-77 (e.g., nutation and catalytic bed heater temperatures) and will compare with the previous 1A/2A SK maneuver performance. The results will be shared on this forum. Next attitude maneuver: Wednesday, 10/28/2015 ======================================================================== OCRs: Update on ACE-355: Relaxing the ACE antenna constraint from 9 to 11 degrees for the 2015 Summer Campaign. The 2015 Summer Campaign, which started on 5/19/2015, concluded with the 10/20/2015 attitude maneuver. The return to the 9 degree upper limit antenna constraint will allow ACE to resume operations with WS1. ======================================================================== Activities: Data Capture: 100% DOY 284-291 2015 ======================================================================== Anomalies: None