[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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Large Asteroids headed toward planets
inhabited by beings that don't have
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