ACE Weekly Report 01-30-02 All ACE spacecraft subsystems are performing nominally. Attitude maneuvers were successfully performed on 01/14/02 and 01/25/02. The next attitude maneuver is scheduled for 02/05/02. OCR SIS-027 was executed on 01/24/02 to disable and raise firmware thresholds on matrix detection strips. One result differed from what was expected. OCR SIS-025 was executed on 01/25/02 to restore the M1B values to their pre-OCR SIS-027 values. The M1A detector values from SIS-027 did work as expected. The instrumenter continues his investigation of the anomalous OCR SIS-027 result. The FOT supported a 34m UPL demo pass with Station D34 on 01/22/02. The FOT sent a total of forty-three (43) commands to the Spacecraft during the one hour and fifteen minute support. As with the October 2001 34m UPL demo pass with DSS-24, the command data accountability section in the monitor block data was not valid; this is different from what is currently received during nominal 34m supports. Also in a nominal pass, commands are rarely transmitted twice. For this demo pass, two commands were transmitted twice unexpectedly. After completion of the planned FOT activities DSS-34 asked if the FOT could send several no_op commands to verify a change made in the command system. A total of 16 no_op commands were sent to the spacecraft; all no_op commands were verified. During the postpass debrief, DSS-34 stated that a verify mode needs to be disabled at BOT and on several occasions they got the error message "Critical - Communication with POCC broken". DR #C100841 was opened for these items. Additional 34m UPL demos will be scheduled as resources are available. Anomalies: 01/17/02 AR# G02-0008 At the start of the support the FOT noticed that the mission was running slowly and in the midst of commanding the spacecraft, the displays crashed on workstation3. The FOT adhered to FOT contingency policy and the impact was minimal. Following the support, the FOT investigated the cause of the crash. The FOT found several extraneous processes owned by the automation account running on the realtime string. A meeting was held between the FOT and automation team to clarify the guidelines for development. 01/18/02 AR# G02-0009 FOT experienced ~9 minute telemetry dropout when Isis processes shut down. IP NOC contacted and informed FOT that they were currently working with the IMAGE MOC. All affected SSR data was redumped. 01/20/02 AR# G02-0010 FOT unable to configure string 1 for realtime operations. FOT escalations procedures followed and TSMs notified. FOT failed over to string 2 and configured it to support the realtime support. No problems experienced with string 2 during the support. TSM contacted NASCOM who informed him that they were having intermittent network dropouts. Block history file replay performed to update DPS. 01/21/02 AR# G02-0011 Closed Network problems continued with string 1. FOT unable to configure string 1 to support realtime pass. IP NOC and TSMs notified. FOT escalations procedures followed. String 2 configured and used to take realtime support. TSM later reported to FOT that the problem appeared to have been resolved at ~2200 on DOY 021. No specific information received as to the cause of the network problems. 01/22/02 AR# G02-0012 FOT noticed the spacecraft receiver AGC drop each time a command was sent, though all commands were verified. Station 16 contacted; asked to monitor the command system. D16 noticed that the command modulation index spiked from the nominal .86 radians to 4.8. FOT gave station go ahead to reconfigure system. A no_op command was sent and verified. No further command problems experienced during the support. 01/22/02 AR# G02-0017 Unknown command source Station D16 contacted station during the support (~1752) and queried whether FOT was experiencing problems commanding. The FOT was not commanding at the time. D16 said that they were receiving commands from somewhere. ~18:08 FOT finished commanding for the day and asked D16 if they found the source of the commanding. They said the source was 91 (91dec = DSS-06 (DTF-21 70m) from OPS-6-21A). 01/22/02 AR# G02-0014 FOT locked out of the spacecraft during 34m UPL demo. FOT failed to synchronize the ground frame sequence number with the spacecraft report value prior to issuing first command. Escalation procedures followed; /Unlock command issued, /resync issued and the demo continued. 01/24/02 AR# G02-0015 SISECHO page did not display all sections of the dump. The instrumenter monitored the execution of OCR SIS-027 and received all data successfully. One result was different than was expected; the instrumenter will investigate. 01/27/02 AR# G02-0016 FOT experienced ~3 minute telemetry dropout. D16 contacted. The station informed the FOT that there were SCP problems. No further problems experienced during the support (DR# G100741).