ACE Weekly 04/23/2014 - 04/29/2014

All ACE spacecraft subsystems are performing as expected.

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Orbit/Attitude:

	Type         Attitude
	Date         04/29/2014
	DOY          119 2014
	Thrusters    2R 4R+ 4R-
	Duration     11:27 min
	Start        17:10:21z
	Stop         17:21:48z
	HGAStart     -9.89 deg
	HGAStop     +10.89 deg
	SunStart     11.54 deg
	SunStop      17.28 deg
	SpinStart    4.9943 rpm
	SpinStop     4.9971 rpm
	Nutation      0.11 deg
	Firing       58 pulses
	FuelUsed       0.1783 lbm
	FuelRemain   107.2716 lbm
	FinalSCMass  1341.532 lbm

The next attitude maneuver is scheduled for Tuesday 05/06/2014.  Station
Keeping maneuver #69 is scheduled for 05/13/2014.

ACE will cross the ecliptic plane this coming week (~5/3/2014).  For the
next 2 weeks, the spacecraft antenna will be turned the usual 11 degrees
from Earth but will drift back towards Earth, resulting in an increasing
signal strength over the week.  For the 5/13/2013 maneuver, the
spacecraft will have moved above the ecliptic plane and the spacecraft
antenna angle will stay closer to 11 degrees for the following week.

We have found a maneuver targeting strategy that maximizes the
spacecraft sun angle and reduces the probability of needing dog-leg
maneuvers (last occurrence 9/2/2008).  Dog-leg maneuvers are needed when
the sun-pulse and thruster firing would occur at the same time, which
happens at a particular corner of the L1 orbit every 6 months. 

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 110-117 2014

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Anomalies:

None