[Isocops] IBEX Orbit# 159 ATS v001 - approve

Tue Feb 28 15:01:16 EST 2012

All,
	I have looked at the Orbit 159 ATS v001

IBEX_2012_071_o0159a_v001.txt

and I approve.

	No constraint violations per .ccvr file:

IBEX_2012_071_o0159a_v001.ccvr

	The PL commands in the ATS v001 match the STF v001

IBEX_2012_071_o0159a_v001.stf

per Ken's script (thanks!).

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

IBEX_2012_071_o0159a_v001.oef

	Star tracker outage from the 15th at 0400 through the 15th at 
1700, and from the 15th at 2300 to the 18th at 1900; sun-pointing 
maneuver performed at apogee due to first outage almost completely 
covering the maneuver window.

	Ground station contact times and rates per

IBEX_Orbit159Contacts_v001.txt

match S/C commands for the first 3 of 4 contacts; there's a 45-minute 
offset for the last, but that was corrected by the contact update 
sent yesterday, so all contacts match now.

	Battery cell balancing this orbit, skipped orbit before last. 
1.5 hours, eclipse-flag FALSE is second command as appropriate.

	Inertial maneuver at the end of orbit 158 left us pointing in 
a safe direction for ascending and descending macros during first 
half of orbit:

[tapley at ena ~]$ ibex_rotate -o -u 0.97978,-0.178091,-0.091189 -w 
ibex-sun -t 2012/03:11:17:28:01
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.979780,-0.178091,-0.091189
  which is     R.A. +349.698 Decl.  -5.232
  missing      R.A. +352.110 Decl.  -3.399 (ibex-sun)
  error is     R.A.   +2.412 Decl.  +1.833
  for a total  3.024 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.97978,-0.178091,-0.091189 -w 
ibex-sun -t 2012/03:15:15:16:53
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.979780,-0.178091,-0.091189
  which is     R.A. +349.698 Decl.  -5.232
  missing      R.A. +355.716 Decl.  -1.890 (ibex-sun)
  error is     R.A.   +6.018 Decl.  +3.342
  for a total  6.872 deg

	Sun-pointing 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 -r +355.784 -d -1.861 -w ibex-sun -t 
2012/03:15:17:05:41
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.996768,-0.073478,-0.032475
  which is     R.A. +355.784 Decl.  -1.861
  missing      R.A. +355.784 Decl.  -1.861 (ibex-sun)
  error is     R.A.   +0.000 Decl.  +0.000
  for a total  0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r +355.784 -d -1.861 -w ibex-sun -t 
2012/03:15:18:35:47
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.996768,-0.073478,-0.032475
  which is     R.A. +355.784 Decl.  -1.861
  missing      R.A. +355.840 Decl.  -1.837 (ibex-sun)
  error is     R.A.   +0.056 Decl.  +0.024
  for a total  0.061 deg
[tapley at ena ~]$ ibex_rotate -o -r +355.784 -d -1.861 -w ibex-sun -t 
2012/03:19:16:15:41
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.996768,-0.073478,-0.032475
  which is     R.A. +355.784 Decl.  -1.861
  missing      R.A. +359.327 Decl.  -0.303 (ibex-sun)
  error is     R.A.   +3.543 Decl.  +1.558
  for a total  3.870 deg

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

[tapley at ena ~]$ ibex_rotate -o -u 0.998889,-0.036523,-0.029788 -w 
ibex-sun -t 2012/03:19:22:46:24
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.998889,-0.036523,-0.029788
  which is     R.A. +357.906 Decl.  -1.707
  missing      R.A. +359.576 Decl.  -0.186 (ibex-sun)
  error is     R.A.   +1.670 Decl.  +1.521
  for a total  2.259 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.998889,-0.036523,-0.029788 -w 
ibex-sun -t 2012-03-24T15:02:05.811Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.998889,-0.036523,-0.029788
  which is     R.A. +357.906 Decl.  -1.707
  missing      R.A.   +3.928 Decl.  +1.665 (ibex-sun)
  error is     R.A. +353.977 Decl.  +3.372
  for a total  6.902 deg

	No -Lo O-mode Commands.

	No overlap to orbit 158 apparent by manual check; 
http://ibex.unh.edu/cgi-bin/ats.cgi does not have the orbit 159 
commands integrated yet.

	Command Approval Checklist attached.

	-Hi Neg collimator voltage back to operating at nominal voltage.

	Sun-pointing history if the apogee sun-pointing maneuver fails:

Time			Sun angle	Event
2012/03:11:17:28:01	2.284 deg	O158 Perigee inertial maneuver
2012/03:15:15:16:53	6.872 deg	Descending macro
2012/03:15:17:05:41	6.946 deg	End of planned maneuver
2012/03:15:18:35:47	7.007 deg	Start of PL ascending commands
2012/03:16:17:58:04	7.954 deg	Start of first post-burn contact
2012/03:18:17:58:04	9.895 deg	Start of 2nd post-burn contact
2012/03:19:16:15:41	10.805 deg	End of PL descending commands

At 13:23 -0500 2/27/12, Ibex Mission Operations wrote:
>Guys,
>     Here are the planning files and ATS for Orbit# 159.
>Please respond to this email thread with all comments/questions.
>I will send out checklists later tonight.
>All approvals/comments are due before 29 Feb 12 @1700 UTC

-- 
						- Mark     210-379-4635
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