ACE Weekly 06/11/04 - 06/17/04 All ACE spacecraft subsystems are performing nominally. No maneuvers were= =20 executed this reporting period. The next attitude maneuver is scheduled=20 for 06/25/04. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D Orbit Events: ACE has completed the latest Solar Exclusion Zone (SEZ) transit. The=20 critical SEZ period (SEV < 0.63=B0) occurred 5/30/04 to 6/2/04. While ACE= =20 was crossing the solar disk on 06/01/04, DSS-27 was able to lock onto=20 medium-rate data. On 06/02/04, however, signal strength was less and=20 DSS-24 and DSS-27 were only able to lock onto hi-rate after the SEV angle=20 was above 0.51=B0. Nevertheless, the FOT was able to capture all science= data. 5/30 SEV=3D0.68=B0-0.64=B0 DSS-24 able to lock on hi-rate 5/31 SEV=3D0.43=B0-0.38=B0 DSS-24 able to lock on hi-rate 6/01 SEV<0.26=B0 DSS-27 able to lock on med-rate 6/02 SEV=3D0.45=B0-0.51=B0 DSS-24 & DSS-27 able to lock on med-rate 6/02 SEV>0.51=B0 DSS-24 & DSS-27 able to lock on hi-rate =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D OCRs Executed: NONE =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Ongoing Activities: TAPS: - Transition from GTAS to TAPS occurred on 03/18/04. All trending=20 activities are being accomplished using TAPS. - Installation of TAPS release 4.3 is tentatively scheduled for the first=20 week of July 2004. All open DRs will be fixed in this release. ---------------------------------------------------------------------------- Automation (ROBOTT): - Release 0.6 was installed on String 1 on 05/13/04. -- Release 0.6 will not be used operationally, however testing is= ongoing. - Release 0.7 has been delivered to String 3 and undergoing test at this= time. - SUG development is ongoing. A DRAFT version has been delivered and=20 comments have been provided to the developer. - FOT training on ROBOTT began 05/05/04 and additional sessions are being=20 developed. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D Extra Spacecraft Activities: Day 04163 (6/11/2004) - Ran the procedure s_tlm_sections.prc for SSR B. No= =20 new errors were detected. Day 04164 (6/12/2004) - Ran the procedure s_tlm_sections.prc for SSR A. No= =20 new errors were detected. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Anomalies: DOY 04163 (6/11/2004) ACE Anomaly G04-0050 - Unable To Configure MOC For=20 Support Security scan executed on 06/10/04 left MOC in an inoperable state. FOT=20 unable to configure MOC for support on any of the THREE operations=20 strings. Workstations affected: AC1FE1A, AC2FE1A, AC2XT3 (this xterm was=20 completely dead and had to be replaced), AC3XT1, AC3WS2, AC3WS1. Paged=20 TSMs and upon their instruction rebooted the front-ends for both Strings 1= =20 and 2. After the reboot, the FOT was able to utilize String 1 for= operations. DOY 04164 (6/12/2004) ACE Anomaly G04-0051 - GDS (DSS-16) Uplink Dropped=20 During TCP Swap Uplink dropped when DSS-16 swapped TCPs. RCVR_A_AGC yellow low limit (value= =20 =3D -121.11dB; limit =3D -120dB). Rcvr B also lost lock at this=20 time. IMPACT: None DOY 04163 (6/11/2004) ACE Anomaly G04-0052 - GDS (DSS-16) Old Desktop Used= =20 by DSS-16 DSS-16 used the wrong desktop on 6/9/2004 and 6/11/2004. When DSN=20 transitioned to the new 26m Upgrade/Automation equipment on March 24, 2003,= =20 the original desktop had channel 2 in 'bypass mode'. Unfortunately, the=20 channel 1 data occasionally showed 'bypass mode on' and 'Sync Word Bit=20 Errors=3D32' in the DSN telemetry headers. This caused DPS to have session= =20 failures. This was finally corrected on May 25, 2004 (RRQ-TCP-120) with a= =20 new desktop (with channel 2 no longer in bypass mode). But on June 9,=20 2004, DSS-16 had switched back to the old desktop. NOPE notified and=20 station configured the correct desktop. IMPACT: DPS session failures on=20 6/9/2004 and 6/11/2004. FOT had to manually approve DPS sessions to=20 process data. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Glen A. Miller ACE Flight Operations Observatory Engineer Honeywell Technology Solutions Inc. Goddard Space Flight Center Building 14, Room W10A Mail Stop 428.2 Greenbelt, MD 20771 Office: 301-286-7071 Pager: 800-425-3174 Fax: 301-286-1729 gamiller@pop500.gsfc.nasa.gov ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~