ACE Weekly 08/05/2015 - 08/25/2015

All ACE spacecraft subsystems are performing as expected.

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Attitude/Orbit:

Type               Attitude            Attitude	           Attitude
Date             08/11/2015	      8/18/2015 	  8/25/2015
DOY                223 2015	       230 2015            237 2015
Thrusters        2R 4R+ 4R-	     2R 4R+ 4R-          2R 4R+ 4R-
Duration       7:16 minutes	   7:03 minutes       14:37 minutes
Start             14:33:15z	      18:25:39z           17:23:30z
Stop              14:40:31z	      18:32:42z           17:38:07z
ra,decStart    121.80,11.55	   128.55, 9.67        135.25, 8.74
ra,decStop     128.48, 9.91	   135.20, 8.97        144.87,-1.08
ra,decExpect   128.71, 9.78	   135.44, 8.90        145.22,-1.45
Deviation          0.25 deg (-3.6%)    0.25 deg (-3.6%)    0.51 deg (-3.6%)
HGAStart         -10.20 deg	     -10.09 deg	         -10.10 deg
HGAStop           -7.20 deg	      -5.18 deg	          10.68 deg
SunStart          18.96 deg	      19.01 deg	          18.62 deg
SunStop           13.30 deg	      12.90 deg	          14.99 deg
SpinStart        5.0138 rpm          5.0154 rpm  	 5.0172 rpm
SpinStop         5.0156 rpm	     5.0173 rpm	         5.0217 rpm
Nutation           0.06 deg	       0.18 deg            0.07 deg
Firing            37 pulses	      36 pulses           74 pulses
FuelUsed         0.1186 lbm	     0.1156 lbm          0.2217 lbm
FuelRemain      96.6472 lbm         96.5316 lbm	        96.3100 lbm
FinalSCMass    1330.907 lbm        1330.792 lbm        1330.570 lbm


- The next attitude maneuver is scheduled for Tuesday, 09/01/2015

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 214-235 2015

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Anomalies:

DOY 228 8/16/2015  S-ACE-35  DSN Ground Anomaly �� Madrid Complex

D65 unable to successfully lock on the low rate RTSW data; entire support
lost (DR# M108951).  Post-pass DSN analysis attributes anomaly to the
widened bit error tolerance (BET) solution implemented in response to 2014
ground receipt time anomaly (reference AR# 118839).  FOT will follow up
with the NOPE to determine whether or not BET should be modified.

IMPACT:  Moderate. FOT converted ranging-only support to a tracking pass
and extended duration.  FOT also staffed support to verify S/C status.