[Isocops] IBEX Orbit# 108 ATS - approve
Mark Tapley
mtapley at swri.edu
Fri Dec 24 14:52:56 EST 2010
All,
I have looked at the Orbit 108 ATS v001
(IBEX_2011_003_00_00_v001.txt) and I approve.
The standard "PL mode unknown at the beginning" constraint
violation is the only one.
The PL commands match the STF v001 file
(IBEX_2011_003_16_53_v001.stf) per Ken's script.
PL operations all make sense WRT 15 Re times, ascending and
descending. They are a few minutes off, probably consonant with the
amount of time indicated by the failed along-track ephemeris check
this week. When I finally get around to checking what causes those,
I'll investigate this one as well.
Ground station times line up nicely with the transmitter on times.
Battery cell balancing is > 1 hour from anything.
The sun-pointing maneuver leaves us in a safe direction at
the time of the maneuver and at succeeding ascent and descent, and
takes place about 14.5 hours before the beginning of ST outage:
2011-01-03T19:54:04.317Z,StarTrackerOutageStart,orbit:108,dueTo:earth
[tapley at ena ~]$ ibex_rotate -o -u
0.36487330742800744,-0.8543419494752005,-0.37009093868056353 -w
ibex-sun -t 2011/01:11:04:53:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.364873,-0.854342,-0.370091
which is R.A. +293.126 Decl. -21.721
missing R.A. +292.102 Decl. -21.900 (ibex-sun)
error is R.A. +1.024 Decl. +0.179
for a total 0.967 deg
[tapley at ena ~]$ ibex_rotate -o -u
0.36487330742800744,-0.8543419494752005,-0.37009093868056353 -w
ibex-sun -t 2011-01-11T19:57:33.318Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.364873,-0.854342,-0.370091
which is R.A. +293.126 Decl. -21.721
missing R.A. +292.797 Decl. -21.769 (ibex-sun)
error is R.A. +0.330 Decl. +0.047
for a total 0.310 deg
[tapley at ena ~]$ ibex_rotate -o -u
0.36487330742800744,-0.8543419494752005,-0.37009093868056353 -w
ibex-sun -t 2011-01-18T11:10:22.186Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.364873,-0.854342,-0.370091
which is R.A. +293.126 Decl. -21.721
missing R.A. +299.907 Decl. -20.619 (ibex-sun)
error is R.A. +6.781 Decl. +1.103
for a total 6.418 deg
No O-mode until orbit 110.
ST outage scheduled for 12 hours after the inertial pointing maneuver.
At 0:37 -0500 12/23/10, Ibex Mission Operations wrote:
>Guys,
> Here is the ATS and planning files for Orbit# 108.
>I need ATS comments/approvals by COB Friday 24 Dec 10. Please
>notify Tim Perry of any changes needed for approval
--
- Mark 210-379-4635
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