ACE Weekly 09/03/2014 - 09/09/2014 All ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: Type Attitude SK-71 Date 09/09/2014 09/09/2014 DOY 252 2014 252 2014 Thrusters 2R 4R+ 4R- 3A 4A Duration 7:40 min 0:53 min Start 16:03:13z 17:01:55 Stop 16:10:53z 17:02:48 ra,decStart 152.42,-4.19 158.70,-7.58 ra,decStop 158.70,-7.58 158.68,-7.56 ra,decExpect 159.02,-7.76 158.70,-7.58 Deviation 0.36 deg (-5% short) 0.03 deg HGAStart -9.65 deg +10.76 deg HGAStop +10.76 deg +10.74 deg SunStart 18.07 deg 15.76 deg SunStop 15.76 deg 15.75 deg SpinStart 4.9952 rpm 4.9970 rpm SpinStop 4.9970 rpm 4.9850 rpm Nutation 0.02 deg 0.52 deg Firing 39 pulses continuous FuelUsed 0.1256 lbm 0.1758 lbm FuelRemain 104.4048 lbm 104.2290 lbm FinalSCMass 1338.665 lbm 1338.489 lbm The next attitude maneuver is scheduled for Tuesday 09/16/2014. ======================================================================== OCRs: None ======================================================================== Activities: Data Capture: 99.99% DOY 243-250 2014 DOY 248 16:33:03-16:34:06 64 seconds covered by realtime ADC ADC data includes: CRIS, EPAM, MAG, SIS, and SWEPAM-I but does not include: SWEPAM-E, SWICS, SWIMS and ULEIS ======================================================================== Anomalies: DOY 246 09/03/2014 S-ACE-0687 G14-0014 DSS-24 Red/Antenna Brake DSS-24 was unable to track ACE for the entire pass due to the Antenna Brake Set. DR#G115421 IMPACT: No SSR playback performed. Data would be caught up in 3 days if no further problems were encountered. DOY 248 09/05/2014 S-ACE-0688 G14-0015 DSS-15 Transmitter Red The DSS-15 transmitter was red due to a power supply fault. DSS-15 had been providing downlink. Since ground commands are needed to start the data playback, the tracking was stopped so that the station maintenance could replace the power supplies. Uplink was provided with 78 minutes left in the pass. DR#G115437 IMPACT: Since the data playback was behind schedule, an hour was needed to catch up before the data was overwritten. If DSS-15 had been unable to provide an uplink, ~10 hours of data would have been lost.