ACE Weekly 10/29/04 - 11/04/04

All ACE spacecraft subsystems are performing nominally.  No maneuvers 
executed this reporting period.  The next attitude maneuver is scheduled 
for 11/05/04.

============================================================================
Orbit Events:

Next SEZ transit will run from 11/14/04 to 12/09/04.
   - Minimum SEV angle of approximately 0.83 deg.

Minimum SEV angles of 2005 transits will be greater with each event.

=====================================================================
OCRs Executed:

DOY 04308 (11/03/04) - ULEIS-072 - Memory Dump of PHA Priority Look-up Tables

=====================================================================
Ongoing Activities:

TAPS:
- TAPS Release 4.3 was installed on the Prime System on 10/13/04.
   -- FOT regression testing is in progress.
           --- No problems to report.

----------------------------------------------------------------------------
Automation (ROBOTT):

- ROBOTTv0.9 delivered to String 1 on 09/27/03 (OCR GND_145).
   --  Performing operations in "Auto" mode on String 1.
   -- 13 DR fixes in this release.
         --- 12 DRs have been verified by the FOT to date.
           ---  The last DR to be verified will require ROBOTT to be 
observed over a period
                 of time to ensure no reoccurrence of the problem.
   --  13 DRs have been written against this release.

- Lights-out testing of the ROBOTT system without immediate FOT 
intervention continues.

- ROBOTT ORR held 11/04/04.

============================================================================
Extra Spacecraft Activities:

None

=====================================================================
Anomalies:

DOY 04304 (10/30/04) ACE Anomaly G04-0126 - GDS 26m (DSS-16) Exciter Problem
DSS-16 was unable to provide an uplink at the scheduled time due to SBE-1 
(S-Band Exciter 1) not sweeping as expected.  IMPACT:  27 minute delay in 
daily activities.  Data loss of 37min 10sec of VC4 data (Playback).  DR# 
G104940

DOY 04304 (10/30/04) ACE Anomaly G04-0127 - GDS 26m (DSS-16)  - MFR1 
Malfunction
At 18:44, the station reported the ATS1 would not hold steady lock 
anymore.  The FOT noticed several telemetry dropouts as a result between 
18:44 - 18:50.  The station switched to PGM track and RCVR's returned to 
solid lock.  IMPACT:  Delayed pass activities.  6 minute telemetry 
outage.  DR# G104942

DOY 04305 (10/31/04) ACE Anomaly G04-0128 - GDS 26m (DSS-16) Exciter Problem
DSS-16 had problems acquiring the S/C after attempting two uplink sweeps 
and resetting the SBE.  Operator switched to SBE2 and acquired the 
S/C.  IMPACT:  Delayed pass activities.  DR# G104944

DOY 04307 (11/02/04) ACE Anomaly G04-0129 - GDS 34m (DSS-27) Telemetry 
Processor Problem
After receiving pages from Automation stating no telemetry was being 
received at the MOC, the FOT called the Ops Chief and notified him of the 
problem.  DSS-27 configured second DCC/TLP (DCC11) to CE and telemetry 
resumed.   IMPACT:  No telemetry online for 37 minutes.  All data 
subsequently retrieved via SSR.  DR# G104946

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~