ACE Weekly 04/21/06 - 04/27/06 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude Spin Down Date 04/21/06 04/21/06 DOY 111 2006 111 2006 Thrusters 2R 4R+ 4R- 3R- 4R- Duration 11:52 min 6.58635 sec Start Time 19:09:22z 20:31:15z Stop Time 19:21:14z 20:31:21z Start HGA -4.83 deg Stop HGA 6.39 deg Firing 61 pulses Continuous Start Spin Rate 5.0817 Final Spin Rate 5.0038 The next attitude maneuver is scheduled for Friday 04/28/06. ============================================================================ OCRs: None ============================================================================ Ongoing Activities: Space Link Extension (SLE) - The first version of ACE SLE was delivered to the Library on December 14. The delivery to the ACE MOC will not be until after String 3 is converted to the RIONET. RIONet - String 3 conversion to the RIONet is on hold based on NASCOM's schedule. Attitude Training - The FOT continues training on attitude determination, maneuver planning, and maneuver execution. ============================================================================ Extra Activities: None ============================================================================ Anomalies: DOY 111 (04/21/06) S06-0004 Ordinance Fire Component Red Limit Violation During the maneuver, the Ordinance Fire Component violated its Red High Limit. This occurred because of the small jet start angle. ORD_AB_P1 and ORD_AB_P2 both had 1 brief red high limit violation (RH > 40). 2006-111 19:10:30 - 19:10:31 40.035 IMPACT: Unknown. This will happen when there is less than a second between turning on the select relay and turning off select relay due to the small jet start angle.