[Isocops] IBEX Orbit# 197 ATS v001 - approve

Sun Feb 10 22:53:53 EST 2013

All,
	I have looked at the Orbit 197 ATS v001

IBEX_2013_050_o0197a_v001.txt

	and I approve.

	No constraint violation per .ccvr file:

IBEX_2013_050_o0197a_v001.ccvr

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

IBEX_2013_049_o0197a_v001.stf

	according to Ken's script (thanks!).

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

IBEX_2013_050_o0197a_v001.oef

	Star tracker outage for 4 days and 7 hours (!) through apogee 
requires sun-pointing maneuver.

	No Moon in -LO FOV periods.

	Ground station contact commands match contact times and bit 
rates in Contacts file

IBEX_Orbit197Contacts_v001.txt

	for all 3 contacts.

	Battery cell balancing this orbit, as is appropriate. Should 
do next orbit as well. Commands are more than 1 hour from anything, 
1.5 hours apart, and second command is false, all appropriate.

	Inertial maneuver at the end of orbit 196 left us pointing in 
extra safe directions for ascending and descending macros during 
first half of orbit:

[tapley at ena ~]$ ibex_rotate -o -u 0.892165,-0.41035,-0.188821 -w 
ibex-sun -t 2013/02:19:15:42:36
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.892165,-0.410350,-0.188821
  which is     R.A. +335.300 Decl. -10.884
  missing      R.A. +333.063 Decl. -11.110 (ibex-sun)
  error is     R.A.   +2.237 Decl.  +0.226
  for a total  2.208 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.892165,-0.41035,-0.188821 -w 
ibex-sun -t 2013/02:23:19:35:14
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.892165,-0.410350,-0.188821
  which is     R.A. +335.300 Decl. -10.884
  missing      R.A. +337.028 Decl.  -9.640 (ibex-sun)
  error is     R.A.   +1.728 Decl.  +1.244
  for a total  2.107 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+337.098 -d -9.613 -w ibex-sun -t 
2013/02:23:21:23:22
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.908237,-0.383692,-0.166992
  which is     R.A. +337.098 Decl.  -9.613
  missing      R.A. +337.098 Decl.  -9.613 (ibex-sun)
  error is     R.A.   +0.000 Decl.  +0.000
  for a total  0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r+337.098 -d -9.613 -w ibex-sun -t 
2013/02:23:22:53:28
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.908237,-0.383692,-0.166992
  which is     R.A. +337.098 Decl.  -9.613
  missing      R.A. +337.157 Decl.  -9.590 (ibex-sun)
  error is     R.A.   +0.059 Decl.  +0.023
  for a total  0.062 deg
[tapley at ena ~]$ ibex_rotate -o -r+337.098 -d -9.613 -w ibex-sun -t 
2013/02:28:02:36:04
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.908237,-0.383692,-0.166992
  which is     R.A. +337.098 Decl.  -9.613
  missing      R.A. +341.016 Decl.  -8.029 (ibex-sun)
  error is     R.A.   +3.918 Decl.  +1.584
  for a total  4.183 deg

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

[tapley at ena ~]$ ibex_rotate -o -u 0.943307,-0.300594,-0.140763 -w 
ibex-sun -t 2013/02:28:10:09:05
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.943307,-0.300594,-0.140763
  which is     R.A. +342.325 Decl.  -8.092
  missing      R.A. +341.325 Decl.  -7.898 (ibex-sun)
  error is     R.A.   +1.000 Decl.  +0.194
  for a total  1.009 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.943307,-0.300594,-0.140763 -w 
ibex-sun -t 2013-03-05T05:15:03.372Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.943307,-0.300594,-0.140763
  which is     R.A. +342.325 Decl.  -8.092
  missing      R.A. +345.870 Decl.  -6.078 (ibex-sun)
  error is     R.A.   +3.545 Decl.  +2.014
  for a total  4.053 deg

	No -Lo O-mode Commands.

	No overlap to orbit 196 commands apparent by manual check or 
by reference to  http://ibex.unh.edu/cgi-bin/ats.cgi .

	Command Approval Checklist and Sun Maneuver Checklist attached.

	-Hi Neg collimator back to operating at nominal voltage.

	Pointing was in -Lo ISM mode operations during January and 
returning to nominal, so sun angles are lower and will continue to be 
lower through January. Note that Sun-pointing maneuver means sun 
angles for descending arc are intermediate between desired 
sun-pointing and standard angles.

	Sorry for late reply!


At 18:59 -0500 2/6/13, Ibex Mission Operations wrote:
>Guys,
>    Here are the planning files and ATS for Orbit# 197.
>Please respond to this email thread with comments/approvals which 
>are required by 8 Feb 13 @1300 UTC

-- 
						- Mark     210-379-4635
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