ACE Weekly 05/14/2008 - 05/20/2008

All ACE spacecraft subsystems are performing nominally.

============================================================================
Orbit/Attitude:

	Type        Attitude       SK-48
	Date        05/20/2008     05/20/2008
	DOY         141 2008       141 2008
	Thrusters   2R 4R+ 4R-     3A 4A
	Duration    14:27 min      54.169 sec
	Start       16:59:05z      18:46:33z
	Stop        17:13:32z      18:47:27z
	HGAStart    -6.30deg       +7.65deg
	HGAStop     +7.65deg       +7.60deg
	SunStart    15.29deg        4.94deg
	SunStop      4.94deg        5.00deg
	Nutation     0.22deg        0.30deg
	Firing      74 pulses      Continuous
	FuelUsed      0.2369lbs      0.1948lbs
	FuelRemain  150.1156lbs    149.9208lbs
	FinalSCMass 1384.375lbs    1384.180lbs

The next attitude maneuver is scheduled for Monday 06/02/2008.

===========================================================================
OCRs:

None

============================================================================
Activities:

JPL will not be fixing the ISO router problem until after the Phoenix
mission Entry Decent Landing (EDL) on May 25.  JPL Comm is aware of the
problem and monitoring the router until then.


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

DOY 138  05/17/2008  S-ACE-0320  G08-0058  DSS-27 Antenna Brake
The ground antenna stopped unexpectedly at 2023z.  Tracking was resumed at
2035z.  Uplink was resumed at 2038z.  DR#G108614
IMPACT:  15 minute telemetry outage was redumped later.  No commanding was
needed during this period.

DOY 138  05/17/2008  S-ACE-0321  G08-0059  ROBOTT/C&C Failed to Resume
The MOC automation software failed to resume after DSS-27 antenna returned
to service.  This last occurred DOY 093 2008 (AR#G08-0038).
IMPACT:  Final state-of-health checks were not performed.  Redumps were
performed on the following day.

DOY 141  05/20/2008  S-ACE-0321  G08-0060  ROBOTT/C&C Reboot
C&C is designed to reboot any time the following event message occurs "TSTOL
(ACE) processor, TSTOL_#####, terminating".  The RTADS Display was started
with a connection to the TSTOL processor.  When RTADS Display was
terminated, C&C started the reboot process.  The C&C reboot was unnecessary
and was halted by the FOT.
IMPACT:  Minimal.  A C&C reboot would have delayed the maneuver by 15
minutes.