ACE Weekly 04/23/2014 - 04/29/2014 All ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: Type Attitude Date 04/29/2014 DOY 119 2014 Thrusters 2R 4R+ 4R- Duration 11:27 min Start 17:10:21z Stop 17:21:48z HGAStart -9.89 deg HGAStop +10.89 deg SunStart 11.54 deg SunStop 17.28 deg SpinStart 4.9943 rpm SpinStop 4.9971 rpm Nutation 0.11 deg Firing 58 pulses FuelUsed 0.1783 lbm FuelRemain 107.2716 lbm FinalSCMass 1341.532 lbm The next attitude maneuver is scheduled for Tuesday 05/06/2014. Station Keeping maneuver #69 is scheduled for 05/13/2014. ACE will cross the ecliptic plane this coming week (~5/3/2014). For the next 2 weeks, the spacecraft antenna will be turned the usual 11 degrees from Earth but will drift back towards Earth, resulting in an increasing signal strength over the week. For the 5/13/2013 maneuver, the spacecraft will have moved above the ecliptic plane and the spacecraft antenna angle will stay closer to 11 degrees for the following week. We have found a maneuver targeting strategy that maximizes the spacecraft sun angle and reduces the probability of needing dog-leg maneuvers (last occurrence 9/2/2008). Dog-leg maneuvers are needed when the sun-pulse and thruster firing would occur at the same time, which happens at a particular corner of the L1 orbit every 6 months. ======================================================================== OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 110-117 2014 ======================================================================== Anomalies: None