[Isocops] IBEX Orbit# 111 ATS - approve

Mark Tapley mtapley at swri.edu
Mon Jan 17 14:29:25 EST 2011


All,
	I have looked at the Orbit 111 ATS v001 
(IBEX_2011_026_00_00_v001.txt) and I approve.

	The standard "PL mode unknown at the beginning" constraint 
violation is the only one.

	The PL commands in the ATS v001 match the STF v002 file 
(IBEX_2011_026_15_18_v002.stf) per Ken's script (thanks!).

	PL ascending operations make sense WRT 15 Re ascending and 
descending times.

	Moon in -Lo FOV PMT setback commands are concentric with the 
Forecast OEF MoonInLoFOV time and inside of it by 4 hours on each 
end; this is normal.

	Ground station times match S/C times for all 4 contacts.

	Battery cell balancing is > 1 hour after burn (good). It is 
within 18 minutes after a downlink, but I think that's needed because 
it's constrained by eclipse time.

	The sun-pointing maneuver is inertial burn. Ibex_rotate says 
we are pointing in safe directions at burn time, at the following 15 
Re ascending, and at the following 15 Re descending:

[tapley at ena ~]$ ibex_rotate -o -u 
0.6988566354301353,-0.6563369871894736,-0.28429063009940264 -w 
ibex-sun -t 2011/02:02:15:05:46
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.698857,-0.656337,-0.284291
  which is     R.A. +316.797 Decl. -16.516
  missing      R.A. +315.715 Decl. -16.859 (ibex-sun)
  error is     R.A.   +1.082 Decl.  +0.342
  for a total  1.092 deg
[tapley at ena ~]$ ibex_rotate -o -u 
0.6988566354301353,-0.6563369871894736,-0.28429063009940264 -w 
ibex-sun -t 2011-02-03T05:51:01.505Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.698857,-0.656337,-0.284291
  which is     R.A. +316.797 Decl. -16.516
  missing      R.A. +316.358 Decl. -16.642 (ibex-sun)
  error is     R.A.   +0.439 Decl.  +0.125
  for a total  0.439 deg
[tapley at ena ~]$ ibex_rotate -o -u 
0.6988566354301353,-0.6563369871894736,-0.28429063009940264 -w 
ibex-sun -t 2011-02-10T03:03:54.186Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.698857,-0.656337,-0.284291
  which is     R.A. +316.797 Decl. -16.516
  missing      R.A. +323.239 Decl. -14.569 (ibex-sun)
  error is     R.A.   +6.442 Decl.  +1.948
  for a total  6.504 deg

	O-mode coming up orbit 112.

At 21:16 -0500 1/16/11, Ibex Mission Operations wrote:
>Guys,
>     Here are the planning files and the ATS for Orbit# 111.
>The approval/comments are needed before 18 Jan 11 @ 7am EST
>The ATS  will be uploaded during one of the perigee contacts listed 
>for Orbit# 109

-- 
						- Mark     210-379-4635
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Large Asteroids headed toward planets
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