ACE Weekly 03/27/2013 - 04/02/2013

All ACE spacecraft subsystems are performing as expected.

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Orbit/Attitude:

	Type        Attitude       SK-65
	Date        04/02/2013     04/02/2013
	DOY         092 2013       092 2013
	Thrusters   2R 4R+ 4R-     3A 4A
	Duration    9:01 min       38.442 seconds
	Start       17:39:14z      18:46:19z
	Stop        17:48:15z      18:46:58z
	HGAStart    -8.09deg       +8.91deg
	HGAStop     +8.91deg       +8.87deg
	SunStart    15.86deg       11.99deg
	SunStop     11.99deg       12.00deg
	SpinStart   5.0903rpm      5.0927rpm
	SpinStop    5.0927rpm      5.0838rpm
	Nutation     0.18deg        0.12deg  
	Firing      46 pulses      Continuous
	FuelUsed      0.1465lbm      0.1309lbm
	FuelRemain  115.3672lbm    115.2363lbm
	FinalSCMass 1349.627lbm    1349.496lbm

The next attitude maneuver is scheduled for Tuesday 04/09/2013.

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 083-090 2013

DOY 091  04/01/2013  1130-1500z  DSS-54  ACE Return To Service Demo
No problems were found with the RTS Demo with DSN's DSS-54.  DSS-54 (34m
antenna in Madrid) has been down for repairs since 9/10/2012.
Originally the downtime was "to replace the azimuth track and wheels,
rebalance the elevation axis and replace the antenna controller".
Problems with the concrete pedestal were found which extended the DSS-54
downtime.  DSS-54 will start taking passes on 4/12/2013.

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Anomalies:

DOY 091  04/01/2013  S-ACE-0660  G13-0004  Overlapping ITOS procedures
MMOC ITOS procedures are configured to start at the DSN "start" time
(usually 1 hour before Beginning Of Track).  On DOY 091, the DSS-54 RTS
DEMO and the regularly scheduled TKG PASS were scheduled 30 minutes
apart.  This caused the second pass procedure to begin before the first
procedure had finished.
IMPACT:  No data forwarding to NOAA SWPC and ASC for 30 minutes
(1430-1500z).  Manual intervention to restore ITOS for the DSS-27 pass.
No problems occurred for the DSS-27 pass.  Scheduling guidelines will be
updated.

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Average Sun Angles With Weekly Attitude Maneuvers

Dates         Avg Sun    Avg SEV   Sun-SEV (indicates extra s/c tilt)
-----------   -------    -------   ----------------------------------
10/18-10/23   11.0deg     5.1deg    5.9deg
10/23-10/28    9.3deg     3.3deg    6.0deg
10/28-11/06    7.3deg     2.0deg    5.3deg
11/06-11/13    8.4deg     3.8deg    4.6deg
11/13-11/20   10.3deg     6.3deg    4.0deg
11/20-11/27   12.7deg     8.6deg    4.1deg
11/27-12/04   14.9deg    10.1deg    4.8deg
12/04-12/11   16.0deg    10.9deg    5.1deg
12/11-12/18   16.8deg    11.3deg    5.5deg
12/18-12/27   16.5deg    10.7deg    5.8deg
12/27-01/03   16.0deg     9.1deg    6.9deg
01/03-01/08   15.2deg     7.2deg    8.0deg
01/08-01/15   13.8deg     6.0deg    7.8deg
01/15-01/22   12.3deg     4.0deg    8.3deg
01/22-01/29   10.6deg     2.4deg    8.2deg
01/29-02/05    9.1deg     3.2deg    5.9deg
02/05-02/12    8.4deg     5.1deg    3.3deg
02/12-02/19   12.2deg     7.0deg    5.0deg
02/19-02/26   14.3deg     8.8deg    5.5deg
02/26-03/05   15.6deg    10.4deg    5.2deg
03/05-03/12   16.1deg    11.0deg    5.1deg
03/12-03/19   16.1deg    11.0deg    5.1deg
03/19-03/26   15.4deg    10.4deg    5.0deg
03/26-04/02   14.2deg     9.4deg    4.8deg