ACE Weekly 09/04/2013 - 09/10/2013 All ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: Type Attitude Date 09/10/2013 DOY 253 2013 Thrusters 2R 4R+ 4R- Duration 7:18 min Start 17:40:34z Stop 17:47:52z HGAStart -8.42 deg HGAStop +8.94 deg SunStart 17.89 deg SunStop 14.25 deg SpinStart 4.9561 rpm SpinStop 4.9576 rpm Nutation 0.05 deg Firing 37 pulses FuelUsed 0.1214 lbm FuelRemain 112.1064 lbm FinalSCMass 1346.366 lbm The next attitude maneuver is scheduled for Tuesday 09/17/2013 and station keeping maneuver #67 is scheduled for Monday 09/23/2013. ======================================================================== OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 244-251 2013 The DSN problems on DOY 245 (AR#G13-0009; DR# G114235) resulted in duplicate data being delivered. Depending on the data processing, this could show up as data loss. In particular, duplicate data is a problem when a VC4 frame is spread across 3 VC2 frames (this happened for frames 245-10:34:47 and 245-10:36:13). The MMOC software has been updated (MOCR ACE-318) and is successfully handling this occasional problem. The AFSCN tracking of ACE for NOAA SWPC was tested on 9/9/2013 (DOY 252). AFSCN was last used 11/10/2012. After ~1.8 hours (1500-1645z), AFSCN was able to track ACE and send data. However, a problem with a WAN Interface Unit (IU) Card prevented data from reaching the VAFB SCD and the MMOC for forwarding to NOAA SWPC. The card was fixed and data successfully flowed to NOAA SWPC from 1839-1844z. The test ended with the start of the DSN pass and the switch to the high data-rate. AFSCN tracking will be needed because the NICT antenna in Tokyo is unavailable from Oct 2013 to Mar 2014 and the KSWA antenna on Jeju Island will be unavailable during typhoons. Note, NOAA SWPC activities are separate from the Goddard Flight Operations, but noteworthy topics are occasionally included in this report. ======================================================================== Anomalies: None