ACE spacecraft su=
bsystems are performing as expected.
=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Orbit/Attitude:
Type &nb=
sp; Attitude
Date =
04/21/2015
DOY &nbs=
p; 111 2015
Thrusters &nbs=
p; 2R 4R+ 4R-
Duration &n=
bsp; 10:49 minutes
Start &n=
bsp; 15:50:32z
Stop &nb=
sp; 16:01:21z
ra,decStart &n=
bsp; 38.56,11.74
ra,decStop &nb=
sp; 37.74,21.83
ra,decExpect =
37.97,22.04
Deviation &nbs=
p; 0.30 deg (-1.9%)
HGAStart =
; -1.49 deg
HGAStop =
+8.78 deg
SunStart =
; 9.58 deg
SunStop =
13.14 deg
SpinStart &=
nbsp; 5.0151 rpm
SpinStop &n=
bsp; 5.0181 rpm
Nutation =
; 0.14 deg
Firing &=
nbsp; 55 pulses
FuelUsed =
; 0.1696 lbm
FuelRemain &nb=
sp; 98.8808 lbm
FinalSCMass 1=
333.141 lbm
ACE will cross th=
e ecliptic plane on 4/29/2015. This maneuver and the
previous maneuver=
are longer than usual as the spacecraft attitude
changes from poin=
ting below the ecliptic plane to pointing above the
ecliptic plane.
The next maneuver=
is scheduled for Tuesday 4/28/2015.
=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
OCRs:
None
=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Activities:
Data Capture:&nbs=
p; 100% DOY 102-109 2015
=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Anomalies:
DOY 106 &nbs=
p;04/16/2015 S-ACE-0699 G15-0008 DSS-24 Po=
wer & SSR Stuck
DSS-24 lost power=
while transitioning to commercial power 67 minutes
before End Of Tra=
ck (DR# G116165). Downlink was restored with 7 minutes
before End Of Tra=
ck, but insufficient time for final commanding. The
onboard recorder =
was still in playback when the spacecraft transitioned
to low-rate.
IMPACT: &nbs=
p;NOAA SWPC did not receive data for 60 minutes because their
other antennas ar=
e unable to track ACE at the high data-rate. The
onboard recorder =
was automatically restored by the ground procedures but
manual interventi=
on was necessary to calculate redumps.
DOY 112 &nbs=
p;04/22/2015 S-ACE-0700 G15-0009 DSS-54 Co=
nfiguration Issue
DSS-54 configured=
their equipment to receive the high data-rate before
the commanding wa=
s completed. The MMOC ground system repeated the first
command in the se=
quence since no telemetry was available to indicate
that the command =
had reached the spacecraft. (DR# M108725).
IMPACT: &nbs=
p;Activities delayed 19 minutes until DSS-54 reconfigured to
receive the low d=
ata-rate. Once low-rate telemetry was received by the
MMOC ground syste=
m, the remaining commands were sent. The spacecraft
transitioned to t=
he high data-rate and DSS-54 configured correctly to
receive the high =
data-rate.
--_000_D15FC0FA161860HumbertoMCalvaninasagov_--