ACE Weekly 05/04/2007 - 05/10/2007 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude Date 05/10/2007 DOY 130 2007 Thrusters 2R 4R+ 4R- Duration 13:21 min Start 15:04:25z Stop 15:17:46z StartHGA -7.49 deg StopHGA 7.20 deg Firing 68 pulses FuelUsed 0.2232lbs FuelRemain 157.1216lbs FinalSCMass 1391.382lbs The next attitude maneuver is scheduled for Friday, 05/25/2007. ============================================================================ OCRs: DOY 129 (05/09/2007) GND-181 MOC Firewall Request HTTP and HTTPS requests have been allowed to the FD Product Server and the ASC HDF server. DOY 130 (05/10/2007) GND-180 OpenSSL & Crypt-SSLeay for FD Products Installation has been completed on ac2pc1. This software is necessary for simplifying the download of ACE products from the Flight Dynamics Product Server. ============================================================================ Activities: Due to a hydraulics replacement on DSS-46 and other DSN maintenance activities, ACE will not have any southern hemisphere ranging from Sunday (05/13) to Saturday (05/19). ACE will have southern hemisphere ranging following the attitude maneuver on 05/10 (5/10 & 5/12) and before the next attitude maneuver on Friday 5/25 (5/20, 5/22 & 5/23). RIONET - String 2 conversion to Restricted IONet is ongoing. Issues are being resolved including being unable to connect to the RIONet GMUG for telemetry and establishing connections between strings and printers. Operations are being performed on String 1 (Closed IONet). String 3 (Restricted IONet) is being used as backup. 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. DSN SPS viewperiod generation continues to be an issue. Problems include 1) ACE viewperiod files are being generated to start 5 weeks in the future. 2) ACE viewperiods are not using the latest ephemeris. 3) ACE schedule is missing pass numbers. The DSN/FDF telecon to discuss changes in ephemeris products has not yet been rescheduled. An evaluation is ongoing to replace the TPOCC mission software and incorporate ACE operations into a multi-mission ops center. A decision between L3 INCNG and ITOS mission software is expected soon. ============================================================================ Anomalies: DOY 128 05/08/2007 S-ACE-0175 G07-0034 DSS-24 Network Server Failure DSS-24 ERNS (Enhanced Reliable Network Server) failed at 1739z. Telemetry re-established at 1751z. Commanding re-established at 1820z. IMPACT: 12 minute data gap was not available from DSN CDR, data was redumped from spacecraft. No commanding was required during 41 minute commanding outage. DOY 128 05/08/2007 S-ACE-0176 G07-0035 Backup Front End Network Connection String 3 Front End (ac3fe1a) network cable was partially disconnected during String 2 RIONet conversion. After troubleshooting, the system administrators isolated the problem and reestablished the connection. IMPACT: String 3 is the backup string while String 2 is being converted to the Restricted IONet. DOY 129 05/09/2007 S-ACE-0177 G07-0036 Operations Printer Connection String 1 print spool was configured to use String 2 for the operational printer. After String 2 was converted to the Restricted IONet, the operational string was no longer able to generate printouts. On DOY 130, the print spool was reconfigured to use String 1. IMPACT: Documents were transferred to String 3 to generate the attitude maneuver readiness review on 5/10. DOY 129 05/09/2007 S-ACE-0178 G07-0037 Trending Printer Connection The TAPS trending software (String 1) is unable to connect to the printer. After much troubleshooting and disconnecting the power cable, the printer is now functioning. IMPACT: Minimal. Weekly trending report delayed a few days. DOY 129 05/09/2007 S-ACE-0179 G07-0038 TAPS Unable to Receive Data The TAPS trending software (String 1) did not receive data for DOY 129. After the pass, the DataCapture daemon was restarted. CDR ingest performed to capture the lost data. IMPACT: Minimal. Trending review delayed by 1 day.