[Isocops] IBEX Orbit# 115 ATS - approve

Mark Tapley mtapley at swri.edu
Wed Feb 16 17:54:43 EST 2011


All,
	I have looked at the Orbit 115 ATS v001 
(IBEX_2011_056_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_057_05_21_v002.stf) per Ken's script.

	PL ascending and descending 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 irregular amounts, 
but within normal experience (no worse than ~4 hours).

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

	Battery cell balancing is > 1 hour from anything (good).

	The sun-pointing maneuver this orbit 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

	(NOTE: Descending time taken from IBEX_2011_Orbit111_v001.oef 
which is very old, because the supplied .oef did not extend to 
12-March):


[tapley at ena ~]$ ibex_rotate -o -u 
0.9673928178486794,-0.2324483976329838,-0.10059263597624885 -w 
ibex-sun -t 2011/03:05:11:29:58
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.967393,-0.232448,-0.100593
  which is     R.A. +346.489 Decl.  -5.773
  missing      R.A. +345.613 Decl.  -6.165 (ibex-sun)
  error is     R.A.   +0.876 Decl.  +0.392
  for a total  0.955 deg
[tapley at ena ~]$ ibex_rotate -o -u 
0.9673928178486794,-0.2324483976329838,-0.10059263597624885 -w 
ibex-sun -t 2011-03-06T01:55:37.297Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.967393,-0.232448,-0.100593
  which is     R.A. +346.489 Decl.  -5.773
  missing      R.A. +346.197 Decl.  -5.893 (ibex-sun)
  error is     R.A.   +0.292 Decl.  +0.120
  for a total  0.314 deg
[tapley at ena ~]$ ibex_rotate -o -u 
0.9673928178486794,-0.2324483976329838,-0.10059263597624885 -w 
ibex-sun -t 2011-03-12T16:48:49.196Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.967393,-0.232448,-0.100593
  which is     R.A. +346.489 Decl.  -5.773
  missing      R.A. +352.294 Decl.  -3.351 (ibex-sun)
  error is     R.A.   +5.805 Decl.  +2.422
  for a total  6.273 deg

	No more O-mode.

At 14:25 -0500 2/16/11, Ibex Mission Operations wrote:
>Guys,
>     Here are the planning files and ATS for Orbit # 115.
>Please review/approve the ATS before COB 17Feb 11.

-- 
						- Mark     210-379-4635
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