ACE Weekly 02/21/2012 - 02/27/2012 All ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: Type Attitude Date 02/21/2012 DOY 052 2012 Thrusters 2R 4R+ 4R- Duration 16:56 min Start 20:45:26z Stop 21:02:22z HGAStart -8.04deg HGAStop +7.64deg SunStart 12.46deg SunStop 6.43deg SpinStart 5.0489rpm SpinStop 5.0533rpm Nutation 0.02deg Firing 86 pulses FuelUsed 0.2678lbs FuelRemain 123.7208lbs FinalSCMass 1357.981lbs The next attitude maneuver and station-keeping #60 are scheduled for Monday 03/12/2012. ======================================================================= OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 050-057 2012 The ULEIS shutter has autonomously closed starting Sunday 2/26/2012 due to elevated solar activity. Exact times will given in next week's report. NOAA SWPC is switching to a new ancillary file server. A GSFC gateway request needed to be updated. We submitted the request on Tuesday 02/21/2012 and asked that the update be expedited. It was completed Thursday 02/23/2012. ======================================================================== Anomalies: DOY 045 02/14/2012 S-ACE-0506 S10-0004 S3DPU_CONV_SEC_I RH Limit S3DPU_CONV_SEC_I had a brief red high limit violation (RH > 480 mV). 2012-045 00:17:02 - 00:17:03 486.328-494.172 mV Mark Popecki was notified. IMPACT: The last brief S3DPU_CONV_SEC_I red high limit violation was DOY 281 2011. DOY 055 02/24/2012 S-ACE-0622 G11-0049 ITOS processes not finishing Starting Friday 2/24/2012 (DOY 055), some processes started with the ITOS "system" directive were hung and not finishing. Some processes completed successfully (e.g. ace_create_s_dumplist, ace_clock_data, pass_summary, etc) and others did not (ace_data_fwd, ace_clock_report, moving files). The WIND ITOS context was not impacted. ITOS was restarted Sunday 2/26/2012 (DOY 075). This problem last occurred on 07/31/2011 (DOY 212 2011). IMPACT: Empty clock report files sent to ASC on 2/24/2012 and 2/25/2012; corrected files were resent on 2/26/2012. No data forwarding to NOAA SWPC on Saturday 2/25/2012 and the beginning of Sunday 2/26/2012. Other hung system processes had minimal impact. DOY 058 2/27/2012 S-ACE-0641 G12-0002 Ground antenna brake DSS-27 ground antenna azimuth gear went to brake. Telemetry out for only 6 minutes (1911-1916z). IMPACT: Minimal.