ACE Weekly 08/11/2010 - 08/17/2010 All ACE spacecraft subsystems are performing nominally. ======================================================================== Orbit/Attitude: Type Attitude SK-55 Date 08/17/2010 08/17/2010 DOY 229 2010 229 2010 Thrusters 2R 4R+ 4R- 3A 4A Duration 18:14 min 95.261 sec Start 14:40:26z 16:31:35z Stop 14:58:40z 16:33:10z HGAStart -8.10deg +7.64deg HGAStop +7.64deg +7.69deg SunStart 5.11deg 12.14deg SunStop 12.14deg 12.08deg SpinStart 5.0675rpm 5.0723rpm SpinStop 5.0723rpm 5.0475rpm Nutation 0.09deg 0.05deg Firing 93 pulses Continuous FuelUsed 0.2867lbs 0.3324lbs FuelRemain 134.4960lbs 134.1636lbs FinalSCMass 1368.756lbs 1368.4236lbs The next attitude maneuver is scheduled for Tuesday 09/07/2010. ======================================================================= OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 220-227 2010 DOY 227 2010 - 256 days of complete playback data capture and counting ======================================================================== Anomalies: None Update on Anomaly S10-0006 (S-ACE-0515) SEPICA Line Pressure The SEPICA instrument team has concluded that the SEPICA isobutane tank is probably empty since the SEPICA Line Pressure reached 0psi on DOY 219 0154z (08/07/2010). Under normal operations, the gas was expected to last 6-7 years and at most 10 years. With the closed valves, the gas has lasted 13 years. PC1 valve closed since 02/13/1998 PC2 valve closed since 11/24/2001 PC3 valve closed since 02/04/2005