ACE Weekly 12/29/2006 - 01/04/2007 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude Date 01/04/2007 DOY 004 2007 Thrusters 2R 4R- 4R+ Duration 8:14 min Start 15:38:06z Stop 15:46:20z StartHGA -2.76 deg StopHGA +5.80 deg Firing 42 pulses FinalSCMass 1393.542lbs The next attitude maneuver is scheduled for Friday, 01/12/2007. ============================================================================ OCRs: DOY 003 (01/03/2007) 2005-2054z SEP-110 Step 1 SEPICA powered down. This is an attempt to induce one of the gas valves to open by fluctuating the instrument temperature. DOY 004 (01/04/2007) 1649-1758z SEP-110 Steps 2-6 SEPICA powered up and internal stimulation started. Continuing to induce one of the gas valves to open by fluctuating the instrument temperature. 2 final voltage ramp-up commands will be completed on Friday DOY 005 (01/05/2007). Step 7 of OCR SEP-110 to turn off internal stimulation will be completed next week. SIS-039 will be scheduled in the upcoming week to disable four matrix detector strips that became noisy during the recent solar event. This is to prevent data contamination due to excessive triggering. ============================================================================ Activities: RIONET - Testing and configuration of String 3 continues. * Commanding has not been retested since the initial test on Thursday 12/28/2006 (DOY 362) when commands from String 3/RIONet were not reaching JPL's Special Function Gateway (SFG). * FDF is reworking their process so that ACE ephemeris files are available to the RIONet. * DSN CDR delivery to String 3 has not yet been configured for the RIONet IP address. * Completion of testing and configuration of String 3 is ongoing. * Tentative start date for converting String 2 to the Restricted IONet is January 2007. Space Link Extension (SLE) - ACE SLE version 2.1 was delivered to the Library on April 28, 2006. Installation in the ACE MOC will not occur until after the MOC is converted to the RIONET. ============================================================================ Anomalies: DOY 365 (12/31/2006) S-ACE-0138 (G06-0126) - Postpass activities not executed On the last day of the year, ROBOTT does not execute postpass activities. This is a known issue (CDSID#00021127) IMPACT: Postpass reports were manually generated. The failure to archive block history files lead to Anomalies #G07-0001 and Anomaly #G07-0002. DOY 001 (01/01/2007) S-ACE-0139 (G07-0001) - Incorrect dumplist The FOT tool to create the daily dumplist did not process block history files in the correct order. AB365 files were processed after AB001 files. MOCR 1231 has been updated to fix this tool. IMPACT: The dumplist was not correct. The dumplist was manually recreated on DOY 002. Data gaps from DOY 001, however, were due to the network and all data was available on the CDR. DOY 001 (01/01/2007) S-ACE-0140 (G07-0002) - 2 Instances of RTMON and C&C ROBOTT/C&C froze due to a known issue (5 minutes pause/CDSID#00021192). Unfortunately, there were 2 instances of ROBOTT's Real-Time Monitor from testing that the FOT had been performing in the first week of December. Both instances of RTMON started their own instance of C&C. Both instances of C&C started executing their own procedures. Only one C&C had the correct privileges, but the errors generated by the one C&C was causing the other C&C to prematurely continue through WAIT statements. This caused directives and spacecraft commands to be executed incorrectly. On DOY 002, ROBOTT developers were notified and they discovered the problem and the 2nd RTMON was terminated. IMPACT: This type of problem can have unpredictable results that can lead to data loss, incorrect loads and timers not reset. For this anomaly, a timer reset command that was supposed to be sent to C&DH B was sent to C&DH A. The C&DH B timer (a 4 day timer) was reset on the following day.