[Isocops] IBEX Orbit# 195 ATS v002 - approve

Mark Tapley mtapley at swri.edu
Fri Jan 18 17:17:01 EST 2013


All,
	I have looked at the Orbit 195 ATS v002

IBEX_2013_031_o0195a_v002.txt

	and the -Lo no-filter ATS

IBEX_2013_031_o0195a_TOFnofilter_v001.txt

	and I approve.

	No constraint violation per .ccvr file:

IBEX_2013_031_o0195a_v002.ccvr

	The PL commands in the ATS v002 file match those in the STF

IBEX_2013_031_o0195a_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_031_o0195a_v002.oef

	Star tracker outage for 3 days and 18 hours near apogee 
requires sun-pointing maneuver.

	Moon in -LO FOV during descending arc; ATS commands are 2 
hours early at start and 5 hours early at end for a 20 hour 
Moon-in-Lo-FOV period, about normal.
	Moon in -Lo FOV overlaps TOF No Filter test.

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

IBEX_Orbit195Contacts_v001.txt

	for all 3 contacts.

	Battery cell balancing this orbit, as is appropriate. Should 
skip next orbit. Second command is FALSE, 1.5 hours after first 
command, hours away from any thing else, all as appropriate.

	Inertial maneuver at the end of orbit 194 left us pointing in 
extra safe directions for ascending and descending macros during 
first half of orbit:

[tapley at ena ~]$ ibex_rotate -o -u 0.701247,-0.650044,-0.292739 -w 
ibex-sun -t 2013/02:01:06:28:30
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.701247,-0.650044,-0.292739
  which is     R.A. +317.170 Decl. -17.022
  missing      R.A. +314.878 Decl. -17.076 (ibex-sun)
  error is     R.A.   +2.292 Decl.  +0.054
  for a total  2.192 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.701247,-0.650044,-0.292739 -w 
ibex-sun -t 2013/02:05:06:44:23
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.701247,-0.650044,-0.292739
  which is     R.A. +317.170 Decl. -17.022
  missing      R.A. +318.893 Decl. -15.944 (ibex-sun)
  error is     R.A.   +1.723 Decl.  +1.078
  for a total  1.972 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+318.967 -d-15.922 -w ibex-sun -t 
2013/02:05:08:32:31
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.725392,-0.631308,-0.274328
  which is     R.A. +318.967 Decl. -15.922
  missing      R.A. +318.967 Decl. -15.922 (ibex-sun)
  error is     R.A.   +0.000 Decl.  +0.000
  for a total  0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r+318.967 -d-15.922 -w ibex-sun -t 
2013/02:05:10:02:37
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.725392,-0.631308,-0.274328
  which is     R.A. +318.967 Decl. -15.922
  missing      R.A. +319.029 Decl. -15.904 (ibex-sun)
  error is     R.A.   +0.062 Decl.  +0.018
  for a total  0.062 deg
[tapley at ena ~]$ ibex_rotate -o -r+318.967 -d-15.922 -w ibex-sun -t 
2013/02:09:10:02:09
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.725392,-0.631308,-0.274328
  which is     R.A. +318.967 Decl. -15.922
  missing      R.A. +322.996 Decl. -14.626 (ibex-sun)
  error is     R.A.   +4.029 Decl.  +1.296
  for a total  4.097 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 0.806968,-0.537794,-0.244089 -w 
ibex-sun -t 2013/02:09:17:16:46
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.806968,-0.537794,-0.244089
  which is     R.A. +326.319 Decl. -14.128
  missing      R.A. +323.314 Decl. -14.516 (ibex-sun)
  error is     R.A.   +3.005 Decl.  +0.388
  for a total  2.938 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.806968,-0.537794,-0.244089 -w 
ibex-sun -t 2013-02-14T12:32:06.422Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.806968,-0.537794,-0.244089
  which is     R.A. +326.319 Decl. -14.128
  missing      R.A. +328.066 Decl. -12.951 (ibex-sun)
  error is     R.A.   +1.747 Decl.  +1.177
  for a total  2.066 deg

	No -Lo O-mode Commands.

	No overlap to orbit 194 commands apparent by manual check or 
by reference to  http://ibex.unh.edu/cgi-bin/ats.cgi . The website 
does show interleaving of the -Lo TOF no-filter test ATS with the 
o195 ATS.

	Command Approval Checklist and Sun Maneuver Checklist attached.

	-Hi Neg collimator back to operating at nominal voltage.

	Pointing is in -Lo ISM mode operations during January, 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.


At 13:58 -0500 1/18/13, Ibex Mission Operations wrote:
>Guys,
>Ken noticed some issues with the star tracker outages.  I had to 
>re-run the products and ATS for ORbit# 195.
>I forgot to commit the ATS generated for Orbit# 194 so MPS put two 
>tracker outages on the OEF because we changed forecast STF files.
>Comments/approvals are needed before 21 Jan 12 @ 1800 UTC
>
>Sorry for the confusion  :   ) 

-- 
						- Mark     210-379-4635
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