[Isocops] IBEX Orbit# 138a ATS v001 - approve.

[Mark Tapley]

All,
	I have looked at the Orbit 138a ATS v001

IBEX_2011_244_o0138a_v001.txt

and I approve.

	No constraint violations.

	The PL commands in the ATS v001 match the STF v001 file

IBEX_2011_244_o0138a_v001.stf

per brief inspection (will confirm with Ken's script later) with the 
exception that the pointing vectors are off in the 5th place 
(negligible difference).

	PL ascending and descending operations make sense with 
respect to 15 Re ascending, Apogee, and 15 Re descending times from

IBEX_2011_244_o0138a_v001.oef

	Moon in -Lo FOV PMT setback commands are concentric with .oef 
Moon-in-Lo-FOV times and a few hours inside, as normal.

	Ground station contact times match S/C commands.

	No Battery cell balancing.

	NOTE: Inertial maneuver at end of orbit ends about 4 hours 
before a star tracker outage (overlap) starts. This is not just a lot 
of time, but the predictions have been reasonably accurate in the 
past. We should be sure we are comfortable with this or think about 
adding a contact to double-check that the maneuver went off OK.

	Inertial maneuver at the end of orbit 137 left us pointing in 
a safe direction for ascending and descending macros during first 
half of orbit:

[tapley at ena ~]$ ibex_rotate -o -u -0.914463,0.376205,0.149087 -w 
ibex-sun -t 2011/09:01:20:34:10
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.914463,+0.376205,+0.149087
  which is     R.A. +157.638 Decl.  +8.574
  missing      R.A. +160.476 Decl.  +8.255 (ibex-sun)
  error is     R.A.   +2.838 Decl.  +0.319
  for a total  2.826 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.914463,0.376205,0.149087 -w 
ibex-sun -t 2011/09:05:08:49:14
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.914463,+0.376205,+0.149087
  which is     R.A. +157.638 Decl.  +8.574
  missing      R.A. +163.647 Decl.  +6.930 (ibex-sun)
  error is     R.A.   +6.009 Decl.  +1.644
  for a total  6.177 deg

	Inertial maneuver at apogee leaves us pointing in a safe 
direction at maneuver and at following Ascending and Descending 
Macros.

[tapley at ena ~]$ ibex_rotate -o -u -0.94199,0.312646,0.122095 -w 
ibex-sun -t 2011/09:05:10:25:26
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.941990,+0.312646,+0.122095
  which is     R.A. +161.639 Decl.  +7.013
  missing      R.A. +163.708 Decl.  +6.905 (ibex-sun)
  error is     R.A.   +2.069 Decl.  +0.108
  for a total  2.057 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.94199,0.312646,0.122095 -w 
ibex-sun -t 2011/09:05:12:08:08
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.941990,+0.312646,+0.122095
  which is     R.A. +161.639 Decl.  +7.013
  missing      R.A. +163.774 Decl.  +6.877 (ibex-sun)
  error is     R.A.   +2.135 Decl.  +0.136
  for a total  2.123 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.94199,0.312646,0.122095 -w 
ibex-sun -t 2011/09:09:20:22:21
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.941990,+0.312646,+0.122095
  which is     R.A. +161.639 Decl.  +7.013
  missing      R.A. +167.741 Decl.  +5.243 (ibex-sun)
  error is     R.A.   +6.102 Decl.  +1.770
  for a total  6.320 deg

	Maneuver at perigee leaves us pointing in a safe direction at 
maneuver and at following Apogee.

[tapley at ena ~]$ ibex_rotate -o -u -0.964982,0.245487,0.09244 -w 
ibex-sun -t 2011/09:10:02:27:32
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.964982,+0.245487,+0.092440
  which is     R.A. +165.727 Decl.  +5.304
  missing      R.A. +167.965 Decl.  +5.159 (ibex-sun)
  error is     R.A.   +2.238 Decl.  +0.145
  for a total  2.233 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.964982,0.245487,0.09244 -w 
ibex-sun -t 2011-09-14T20:41:23.442Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.964982,+0.245487,+0.092440
  which is     R.A. +165.727 Decl.  +5.304
  missing      R.A. +172.171 Decl.  +3.346 (ibex-sun)
  error is     R.A.   +6.444 Decl.  +1.957
  for a total  6.717 deg

	No O-mode this orbit.

	No overlaps to orbit 137, either manual check or per 
http://ibex.unh.edu/cgi-bin/ats.cgi.

	Command Approval Checklist attached as .doc.


At 11:56 AM -0400 8/19/11, Ibex Mission Operations wrote:
>Guys,
>     Here are the planning files and ATS for Orbit# 138.
>Please respond to this thread for aapproval/comments which are due
>21 Aug 11 @ 2300 UTC
>Bettery Balancing Commands were omitted due to the new schedule.

-- 
						- Mark     210-379-4635
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