[Isocops] IBEX Orbit# 192 ATS v002 - approve

Mark Tapley mtapley at swri.edu
Fri Dec 21 15:33:17 EST 2012


All,
	I have looked at the Orbit 192 ATS v002

IBEX_2012_004_o0192a_v002.txt

	and I approve.

	No constraint violation per .ccvr file:

IBEX_2012_004_o0192a_v001.ccvr

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

IBEX_2013_004_o0192a_v001.stf

	according to Ken's script (thanks!) to V001 and then diff 
between v001 and v002.

	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_004_o0192a_v001.oef

	Star tracker outage for 2 days and 4 hours of first arc 
ascending science operations; may require de-spinning.

	Moon in -LO FOV during ascending arc and apogee operations; 
ATS commands are 1.5 hours late start and 12 hours early end compared 
to .oef start and end times for a 2 day Moon in FOV period, which is 
about normal. Voltages are set down to correct levels one minute 
after science operations begin subsequent to apogee maneuver, as is 
correct.

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

IBEX_2011_Orbit192_v001.caf

	for all 3 contacts. (Note .caf file name is odd, saying 2011 
vs. 2012, but events match up.)

	Battery cell balancing this orbit. Should skip next orbit. 
Second command is FALSE, 1.5 hours after first command, not near any 
other event.

	Inertial maneuver at the end of orbit 191 left us pointing in 
extra safe directions for ascending and descending macros during 
first half of orbit:

[tapley at ena ~]$ ibex_rotate -o -u 0.286518,-0.875,-0.390233 -w 
ibex-sun -t 2013/01:04:21:53:02
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.286518,-0.875000,-0.390233
  which is     R.A. +288.131 Decl. -22.969
  missing      R.A. +285.810 Decl. -22.640 (ibex-sun)
  error is     R.A.   +2.321 Decl.  +0.329
  for a total  2.165 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.286518,-0.875,-0.390233 -w 
ibex-sun -t 2013/01:08:10:17:47
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.286518,-0.875000,-0.390233
  which is     R.A. +288.131 Decl. -22.969
  missing      R.A. +289.570 Decl. -22.252 (ibex-sun)
  error is     R.A.   +1.439 Decl.  +0.717
  for a total  1.510 deg

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

[tapley at ena ~]$ ibex_rotate -o -u 0.35292,-0.854385,-0.381409 -w 
ibex-sun -t 2013/01:08:12:00:55
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.352920,-0.854385,-0.381409
  which is     R.A. +292.444 Decl. -22.421
  missing      R.A. +289.647 Decl. -22.242 (ibex-sun)
  error is     R.A.   +2.797 Decl.  +0.179
  for a total  2.594 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.35292,-0.854385,-0.381409 -w 
ibex-sun -t 2013/01:08:13:36:01
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.352920,-0.854385,-0.381409
  which is     R.A. +292.444 Decl. -22.421
  missing      R.A. +289.718 Decl. -22.234 (ibex-sun)
  error is     R.A.   +2.726 Decl.  +0.187
  for a total  2.529 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.35292,-0.854385,-0.381409 -w 
ibex-sun -t 2013/01:12:21:25:17
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.352920,-0.854385,-0.381409
  which is     R.A. +292.444 Decl. -22.421
  missing      R.A. +294.443 Decl. -21.541 (ibex-sun)
  error is     R.A.   +1.999 Decl.  +0.880
  for a total  2.052 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 0.435422,-0.821918,-0.367232 -w 
ibex-sun -t 2013/01:13:04:37:24
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.435422,-0.821918,-0.367232
  which is     R.A. +297.913 Decl. -21.545
  missing      R.A. +294.793 Decl. -21.480 (ibex-sun)
  error is     R.A.   +3.120 Decl.  +0.065
  for a total  2.904 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.435422,-0.821918,-0.367232 -w 
ibex-sun -t 2013-01-17T22:22:13.314Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.435422,-0.821918,-0.367232
  which is     R.A. +297.913 Decl. -21.545
  missing      R.A. +299.839 Decl. -20.643 (ibex-sun)
  error is     R.A.   +1.926 Decl.  +0.902
  for a total  2.011 deg

	No -Lo O-mode Commands.

	No overlap to orbit 191 commands apparent by manual check; 
http://ibex.unh.edu/cgi-bin/ats.cgi has not yet ingested the o192 
load.

	Command Approval 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.

At 12:59 PM -0500 12/21/12, IBEX wrote:
>All,
>    Attached are the ATS files for Orbit 192. All questions and approvals
>need to be in by COB Dec 25th.
>Battery Balancing @Jan 13, 2013 10:00 - 11:30:00
>No errors on the CCVR
>        Merry Christmas
>             Tim

At 2:55 PM -0500 12/21/12, IBEX wrote:
>All,
>     Attached is Version #2 of the Orbit #192 ATS. Contacts included this
>time.
>         Tim

-- 
						- Mark     210-379-4635
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