ACE Weekly 06/26/2012 - 07/03/2012

All ACE spacecraft subsystems are performing as expected.

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Orbit/Attitude:

No maneuvers were completed this week.  The next attitude maneuver is
scheduled for Thursday 07/12/2012.

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 176-183 2012

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Anomalies:

Update on AR#S12-0001  S-ACE-0639  SWEPAM-E Overcount Alarm
The SWEPAM-Electron overcount threshold was increased to 255 (the
maximum value for instrument flight code v1.14) on Monday 6/25/2012 but
the overcount alarm continues to flag.  The instrument team believes
that one of the sensor channels has become noisy.  The team is preparing
to dump the executable code stored in RAM (0x8000-98ff).  The plan is to
modify the memory to increase the overcount threshold.  IMPACT: The
instrument automatically reduces voltages when the overcount alarm
occurs.


The following issue was not included in the previous weekly:
DOY 170 06/18/2012  S-ACE-0644  G12-0006  DSN not forwarding tracking
On Wednesday 6/20, FDF reported no ACE tracking data for two days (6/18
and 6/19).  DSN was notified and they restarted the process that queries
the ACE tracking data and sends it to the SFG (Special Function
Gateway).  ACE tracking data from 6/18 and 6/19 was retransmitted to
FDF.
IMPACT:  No impact to operations.  FDF received the missing data.


DOY 181 06/29/2012  S-ACE-0645  G12-0007  DSS-27 Azimuth Drive
The ground station's azimuth drive was not working at beginning of
track.  Programmable Logic Controller (PLC) was replaced.  DR#G112917
IMPACT:  Activities delayed 25 minutes.  Data playback completed on
following pass.  No impact to NOAA SWPC space weather since spacecraft
still in RTSW format.