ACE Weekly 09/14/2016 - 09/20/2016 All ACE spacecraft subsystems are performing as expected. ======================================================================== - Attitude & Spin Down maneuvers moved from Tuesday, 9/20 to Thursday, 9/22 due to DSN Transmitter problem. See anomaly report S-ACE-93-CTT-7 below. Upcoming Maneuver Schedule: - Attitude Maneuver: Thursday, 09/22/2016 - Spin Down: Thursday, 09/22/2016 - Station Keeping (SK-82): TBD ======================================================================== OCRs: None ======================================================================== Activities: Data Capture: 100% 2016 DOY 256 - 2016 DOY 262 ======================================================================== Anomalies: DOY 259 09/15/2016 S-ACE-98 Realtime Data loss during WS1 Support Realtime data went offline unexpectedly for ~26 minutes during the support (~1428-1454z). FOT contacted WS1 to restart the RT port connection. After reconnecting, WS1 still noticed an error on the realtime connection. FOT then restarted its mmoc_fanout. WS1 successfully reestablished its realtime connection. IMPACT: Minimal. ~26 minutes of realtime data loss. No impact to playback data. FOT manually halted ace_pass procedure once realtime telemetry was back online, in order to collect 20 minutes of attitude data. Automation activities were then resumed. DOY 260 09/16/2016 S-ACE-93-CTT-6 DSS-24 Problem - Goldstone (recurring) JPL Ops Chief notified the FOT in the midst of its D24 support, that the transmitter would be declared Red due to a "hardware TMG (Transmitter Motor Generator) bearing problem" (DR# G117475). D24 brought its uplink down at ~1900z; EOT was 2045z. IMPACT: Minimal. No manual intervention required. SSR playback continued without interruption. Automation performed pass cleanup activities. FOT verified no gaps in playback data postpass. DOY 264 09/20/2016 S-ACE-93-CTT-7 DSS-24 Problem - Goldstone (recurring) JPL Ops Chief notified FOT prior to BOT that DSS-24 had been declared Red (DR# G117486). DSN reported that DSS-24 had suffered "Loss of uplink capabilities due to a Kepco P.S. problem. A hardware Power Supply unit on the S-band 20KW Transmitter failed." The entire ACE support would be lost. IMPACT: - Attitude and Spin Down maneuver execution moved to 9/22/2016 support. - ACE Scheduler obtained short DSS-34 tracking support for 9/21/2016 in order to catch up on the SSR playback data. =========================================== Jacqueline Maldonado Snell WIND, Geotail and ACE Flight Operations Team Manager Honeywell Technology Solutions Incorporated (HTSI) Goddard Space Flight Center Bldg. 14 Rm N284, Mailstop 428.2 Greenbelt, MD 20771 Office: 301-286-7072 Cell: 443-896-8868 Fax: 301-286-8257 Email: Jacqueline.M.Snell@nasa.gov