ACE Weekly 01/14/2015 - 01/20/2015 ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: Type Attitude Date 01/20/2015 DOY 020 2015 Thrusters 2R 4R+ 4R- Duration 6:18 min Start 20:22:44z Stop 20:29:02z ra,decStart 292.41,-10.42 ra,decStop 298.37,-10.52 ra,decExpect 298.55,-10.64 Deviation 0.21 deg (-3% short) HGAStart -8.65 deg HGAStop +9.05 deg SunStart 13.73 deg SunStop 10.40 deg SpinStart 4.9973 rpm SpinStop 4.9983 rpm Nutation 0.19 deg Firing 32 pulses FuelUsed 0.1043 lbm FuelRemain 101.4780 lbm FinalSCMass 1335.738 lbm The next attitude maneuver is scheduled for Tuesday 01/27/2014. ======================================================================== OCRs: None ======================================================================== Activities: Data Capture: 99.999% DOY 011-018 2015 DOY 017 12:12:32-12:12:33 2 second gap while catching up on data Santiago (Near Earth Network) continues their ranging tests while ACE was in the low downlink rate. The data will be used in preparing for the DSCOVR mission. Additional tests are scheduled for the upcoming week (Wed 1/21, Fri 1/23, Mon 1/26, Tue 1/27) 01/15/2015 DOY 015 1915-2015z 01/20/2015 DOY 020 1700-1800z WS1 antenna time was acquired for Thu 1/15, Sat 1/17 and Sun 1/18. The next WS1 pass is scheduled for 1/30/2015. The DSCOVR launch is now scheduled for 2/8/2015. The scheduling team is still working the passes, but DSN time will certainly be limited. WS1 will be used when it is available, but the LRO view will overlap ACE during the week of the new moon on 2/18/2015. The risk of data loss is increased for February. ======================================================================== Anomalies: DOY 015 01/15/2015 S-ACE-692 G15-0001 DSS-24 Red DSN's D24 antenna was unable to support an ACE pass due to Antenna Servo Drive. DR#G115851 IMPACT: 145 minutes of antenna time lost. Because SSR playback was behind, time with the NEN WS1 antenna was acquired. Data capture was caught up by 1/18/2015.