[Isocops] IBEX Orbit# 108 ATS - approve
Lisa Policastri
lisa at applieddefense.com
Sun Dec 26 13:58:47 EST 2010
Mark -
Regarding your note: 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.
Please let me know which ephem files you were comparing the PL ops times
from ... this failed along-track issue should not happen.
Thanks!
Lisa
___________________
Lisa Policastri
Applied Defense Solutions
lisa at applieddefense.com
office 301.483.4910
voicemail ext. 24
mobile 443.388.0526
-----Original Message-----
From: Mark Tapley [mailto:mtapley at swri.edu]
Sent: Friday, December 24, 2010 2:53 PM
To: Ibex Mission Operations; Bret Hautamaki; IBEX-FDG; IBEXOPS/ORB; ISOC at
New Hampshire; John Cavallo; Mark Tapley; Mark Tapley; Robert Lockwood;
Roland Vanderspek; Ryan Tyler; Sheral Wesley; Thomas Regiec; Tim Perry;
Walker Cross
Cc: mreno at swri.edu; nschwadron at guero.sr.unh.edu
Subject: Re: IBEX Orbit# 108 ATS - approve
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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