ACE Weekly 09/08/06 - 09/14/06 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: No attitude maneuvers were completed this week. The next attitude and station keeping (#41) maneuvers are scheduled for Tuesday, 09/19/06. ============================================================================ OCRs: GRD-167 - 09/08/06 - The hosts.allow file on the operational strings was updated so the FD computer 'adam' can continue to deliver products to the MOC. GRD-168 - 09/08/06 - The hosts.allow file on the operational strings was updated to allow the FD computers 'crosby' and 'stills' to deliver products to the MOC. GRD-169 - 09/14/06 - Installation of the ACEDDS v1.0.1. This release allows the DSN schedule to be downloaded from the new SPS server. The FOT is using the XTEDDS as prime until the new release is verified. ============================================================================ Ongoing Activities: Attitude Training - The OE's will begin training the remainder of the FOT on attitude determination beginning September 11. RIONET - The transition to the RIONET on String 3 will tentatively occur around mid-September. Space Link Extension (SLE) - ACE SLE version 2.1 was delivered to the Library on April 28, 2006. The delivery to the ACE MOC will not occur until after the MOC is converted to the RIONET. Multi-Mission MOC - The FOT has begun supporting the effort to determine the feasibility of transferring to a multi-mission MOC. Automation - Development for the next ROBOTT automation release in ongoing on String 3 and the ACEDDS. The ROBOTT SPS release was delivered September 14. ============================================================================ Extra Activities: None ============================================================================ Anomalies: DOY 251 (09/08/06) S-ACE-0003 (G06-0083) Degraded Data (DSS-66) The FOT noticed intermittent VC2 sequence errors throughout the pass. The FOT reported the problem to JPL Comm and was informed that the primary T1 Link to Madrid was taking hits. DR N103875. IMPACT: None. All data was recoverable from the CDR. DOY 252 (09/09/06) S-ACE-0004 (G06-0084) Excessive Network Hits (DSS-66) Post pass analysis revealed excessive network hits throughout the pass. DR N103880. IMPACT: None. All data was recoverable from the CDR. DOY 254 (09/11/06) S-ACE-0005 (G06-0085) Excessive Network Hits (DSS-66) The FOT noticed alot of network hits throughout the pass. The FOT informed the DSN Ops Chief, who confirmed seeing the network hits but was unsure of the cause. DR N103879. IMPACT: This is a recurring problem with DSS-66. All data was recoverable from the CDR. DOY 255 (09/12/06) G04-0125 Data Server Connection lost (appended) After EOT, Command & Control lost connection to the Data Server. This is an intermittent error. A DR (CDSID #00021091) was submitted on 11/1/04 to document the problem. IMPACT: All commanding and data recovery had already completed for support. Cause of error message continues to be unknown. DOY 257 (09/14/06) S-ACE-0006 (G06-0086) 10 Year Clock Calibration A clock calibration is performed each day to match the spacecraft's Mission Elapse Timer (MET) to UTC. The slope/offset/epoch values are stored in a binary file, Clock_Calibration_File.phaseII. This file only has entries for 1/1/1997 through 12/31/2006. There are 2 problems that need to be addressed. 1. How to update the clock calibration file and generate the slope/offset reports to be sent to ASC and NOAA after 2006. 2. How to get TPOCC and TAPS to accept new clock calibration values after 2006. TPOCC DR ACE#1428 / CDSID 22309 has been submitted. IMPACT: Mission software must be patched to continue clock calibration.