ACE Weekly 03/11/05 - 03/17/05

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

Maneuvers completed
	Type         Attitude      Attitude      Attitude      Station Keeping
	Date         03/11/05      03/11/05      03/17/05      03/17/05
	DOY          070 2005      070 2005      076 2005      076 2005
	Thrusters    2R 4R+ 4R-    2R 4R+ 4R-    2R 4R+ 4R-    3A 4A
	Duration     4:45 min      9:35 min      7:07 min      0:51 min
	Start Time   15:11:54z     16:20:32z     15:10:43z     16:46:29z
	Stop Time    15:16:39z     16:30:07z     15:17:50z     16:47:20z
	Firing       24 pulses     49 pulses     36 pulses     continuous

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OCRs:

None

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Ongoing Activities:

Space Link Extension (SLE) - ACE SLE Requirements are being finalized and
the Test Plan is being generated.

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Extra Activities:

SSR Telemetry Sections downlinked for both SSRs.  No new Single Bit Errors
(correctable) found.  No non-correctable errors (Hard Single Bit Errors &
Double Bit Errors) have occurred throughout the mission.

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Anomalies:

DOY 070 (03/11/05) ACE Anomaly G05-0037  Keyboard Failure
Computer on backup string #3 failed.
IMPACT:  Minimal.  Keyboard replaced by Hardware Maintenance.

DOY 072 (03/13/05) ACE Anomaly G05-0038  MAD 34m (DSS-54) No TLM after BOT
TLM stopped flowing to the MOC at BOT.  Without current telemetry, ROBOTT
software did not send commands initiating switch to hi-rate.  Telemetry flow
resumed at BOT+12min and commanding was initiated.  DR#M103106
IMPACT:  Activities delayed 12 minutes.

DOY 073 (03/14/05) ACE Anomaly G05-0039  GDS 26m (DSS-16) CMD Mod Index
Spacecraft was not accepting commands.  FOT informed station of problem.
Station discovered that the CMD MOD Index was incorrect.  DR#G105421
IMPACT:  Minimal.  Activities delayed 10 minutes.

DOY 074 (03/15/05) ACE Anomaly G05-0040  GDS 26m (DSS-16) TLM & CMD Problems
TLM not flowing to MOC at BOT.  TLM online at BOT+39min.  Afterwards,
spacecraft was not accepting commands.  Station discovered that the CMD Mod
Index was incorrect.  DR#G105426
IMPACT:  Minimal.  Activities delayed 65 minutes.  Pass was extended 35
minutes to complete playback.

DOY 076 (03/17/05) ACE Anomaly G05-0041  ADS Software Froze During Startup
ADS software froze during initialization.  Processes were killed and ADS
restarted successfully.  This is an intermittent problem that last occurred
Oct 2004.
IMPACT:  Minimal.  ADS worked properly for maneuvers.

DOY 076 (03/17/05) ACE Anomaly G05-0042  MAD 34m (DSS-54) No TLM after BOT
TLM stopped flowing to the MOC at BOT+4min.  Commands were not sent to
initiate the switch to hi-rate.  Telemetry flow resumed at BOT+21min and
commanding was initiated.  DR#M103115
IMPACT:  Activities delayed 17 minutes