ACE Weekly 07/20/2007 - 07/26/2007

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude
	Date        07/23/2007
	DOY         204 2007
	Thrusters   2R 4R+ 4R-
	Duration    13:56 min
	Start       14:46:44z
	Stop        15:00:40z
	StartHGA    -6.10 deg
	StopHGA     +7.23 deg
	Firing      71 pulses
	FuelUsed     0.2322lbs
	FuelRemain  155.516lbs
	FinalSCMass 1389.776lbs

The next attitude maneuver is scheduled for Friday, 08/03/2007.

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OCRs:

None

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Activities:

DSN/Goldstone corrective network maintenance resulted in data loss to the
ACE MOC on DOY 206 and 207.  All data is available from DSN's CDR.  However,
NOAA Space Environment Center is impacted by any real-time telemetry loss.
	DOY 206   9.1 minutes lost   1640-1651z
	DOY 207  12.0 minutes lost   1635-1711z

Space Link Extension (SLE) - Planning for the transition to ACE SLE will
start Thursday 08/02/2007.

Planning continues for integrating ACE operations into a multi-mission ops
center (MMOC).

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Anomalies:

DOY 202  07/21/2007  S-ACE-0212  S07-0007  S3DPU_I Red High Limit Violation
S3DPU current (S3DPU_I) briefly violated the red high limit (RH > 145mA).
S3DPU Idle Counter (SSDIDLECTR) ranged from 31-50 indicating an increased
processing load.
	2007-202-17:40:11 - 17:40:27  149.744-151.312mA
IMPACT:  The last brief S3DPU_I violation was 2007-145-16:38:52.

DOY 207  07/26/2007  S-ACE-0213  S07-0008 Increase in SBE_CT_A
SSR A Single Bit Error Count (SBE_CT_A) increased from 270 to 510 and
SCRUB_ERR_CT_A increased from 18 to 34 since last checked on DOY 205
(07/24/2007).  SBE_CT is tracked as a measure of SSR health.
IMPACT:  Minimal.  Single Bit Errors are automatically corrected by the SSR
and occur infrequently.  No non-correctable errors (Hard Single Bit Errors &
Double Bit Errors) have occurred throughout the mission.

SBE_CT_A              SBE_CT_B
12/01/1999   15       09/06/2003   286
02/25/2003   30       09/22/2004   608
06/05/2003   270      11/15/2004   858
07/26/2007   510      11/07/2006   2118
                      01/12/2007   3125
                      06/21/2007   3238