[Isocops] IBEX Orbit# 187 ATS v002 - approve
Mark Tapley
mtapley at swri.edu
Thu Nov 8 12:11:25 EST 2012
All,
I have looked at the Orbit 187 ATS v002
IBEX_2012_325_o0187a_v002.txt
and I approve.
One constraint violation per .ccvr file:
IBEX_2012_325_o0187a_v001.ccvr
low battery state caused by long eclipse, as expected.
The PL commands in the ATS v002 file match those in the STF
IBEX_2012_325_o0187a_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, eclipse, and 15
Re descending times from
IBEX_2012_325_o0187a_v001.oef
Star tracker outage for 13 hours during first arc ascending
and first 7 hours of science operations; should not affect ramp-up
but may require de-spinning.
Star tracker outage from 22nd through 26th requires
sun-pointing maneuver at apogee.
Star tracker outage from 28th through 29th requires
sun-pointing maneuver at perigee.
No Moon in -LO FOV.
Ground station contact commands match contact times in Contacts file
IBEX_Orbit187Contacts_v001.txt
for all 3 contacts. No contacts during eclipses. SSR dump
contact on 29th overlaps cat-bed heater operation by 2 minutes, 3
hours and 23 minutes after eclipse exit.
Battery cell balancing unavoidable due to eclipse operations.
Inertial maneuver at the end of orbit 186 left us pointing in
a safe direction for ascending and descending macros during first
half of orbit:
[tapley at ena ~]$ ibex_rotate -o -u -0.558211,-0.756088,-0.341659 -w
ibex-sun -t 2012/11:21:04:11:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.558211,-0.756088,-0.341659
which is R.A. +233.562 Decl. -19.978
missing R.A. +236.861 Decl. -19.948 (ibex-sun)
error is R.A. +3.299 Decl. +0.030
for a total 3.101 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.558211,-0.756088,-0.341659 -w
ibex-sun -t 2012/11:25:00:40:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.558211,-0.756088,-0.341659
which is R.A. +233.562 Decl. -19.978
missing R.A. +240.802 Decl. -20.762 (ibex-sun)
error is R.A. +7.240 Decl. +0.784
for a total 6.832 deg
Sun-pointing maneuver at apogee leaves us pointing in a
really safe direction at maneuver and at following Ascending and
Descending Macros.
[tapley at ena ~]$ ibex_rotate -o -r+240.882 -d -20.777 -w ibex-sun -t
2012/11:25:02:28:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.454965,-0.816806,-0.354732
which is R.A. +240.882 Decl. -20.777
missing R.A. +240.882 Decl. -20.777 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r+240.882 -d -20.777 -w ibex-sun -t
2012/11:25:03:58:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.454965,-0.816806,-0.354732
which is R.A. +240.882 Decl. -20.777
missing R.A. +240.948 Decl. -20.789 (ibex-sun)
error is R.A. +0.066 Decl. +0.012
for a total 0.063 deg
[tapley at ena ~]$ ibex_rotate -o -r+240.882 -d -20.777 -w ibex-sun -t
2012/11:29:00:34:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.454965,-0.816806,-0.354732
which is R.A. +240.882 Decl. -20.777
missing R.A. +245.182 Decl. -21.482 (ibex-sun)
error is R.A. +4.300 Decl. +0.705
for a total 4.072 deg
Sun-pointing maneuver at perigee leaves us pointing in a
really safe direction at maneuver and at following Apogee.
[tapley at ena ~]$ ibex_rotate -o -r +245.558 -d -21.534 -w ibex-sun -t
2012/11:29:08:25:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.384891,-0.846836,-0.367053
which is R.A. +245.558 Decl. -21.534
missing R.A. +245.558 Decl. -21.534 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
[tapley at ena ~]$ ibex_rotate -o -r +245.558 -d -21.534 -w ibex-sun -t
2012-12-04T00:53:27.816Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.384891,-0.846836,-0.367053
which is R.A. +245.558 Decl. -21.534
missing R.A. +250.480 Decl. -22.259 (ibex-sun)
error is R.A. +4.922 Decl. +0.725
for a total 4.624 deg
No -Lo O-mode Commands.
No overlap to orbit 186 commands apparent by manual check or
by reference to http://ibex.unh.edu/cgi-bin/ats.cgi .
Command Approval Checklist attached.
-Hi Neg collimator back to operating at nominal voltage.
At 6:39 -0500 11/8/12, Ibex Mission Operations wrote:
>Guys,
> I have included v002 of the Orbit# 187 ATS.
>The long eclipse flag was adjusted as per Ryan Tyler's new
>assessment of the eclipses.
--
- Mark 210-379-4635
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