[Isocops] IBEX Orbit# 180 ATS v001 - approve - no contact or -Lo commands
Mark Tapley
mtapley at swri.edu
Thu Sep 6 10:25:47 EDT 2012
All,
I have looked at the Orbit 180 ATS v001 (No -Lo commands)
IBEX_2012_262_o0180a_v001.txt
and I approve.
No constraint violations per .ccvr file:
IBEX_2012_262_o0180a_v001.ccvr
The PL commands in the ATS v001 match the STF v002
IBEX_2012_262_o0180a_v002.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_262_o0180a_v001.oef
Star tracker outage near perigee occurs after inertial maneuver.
Moon in -LO FOV for 16 hours, 2 days after apogee. (No -Lo
commands this load).
No Ground station contact commands, Contacts file shows when
2 blind acqs (to save command space) will take place.
Battery cell balancing this orbit; Did this last orbit, can
skip next orbit. Star tracker outage during balancing is irrelevant;
no other events within 1.5 hours.
Inertial maneuver at the end of orbit 179 left us pointing in
a safe direction for ascending and descending macros during first
half of orbit:
[tapley at ena ~]$ ibex_rotate -o -u -0.99387,0.105828,0.031969 -w
ibex-sun -t 2012/09:19:05:39:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993870,+0.105828,+0.031969
which is R.A. +173.922 Decl. +1.832
missing R.A. +176.772 Decl. +1.402 (ibex-sun)
error is R.A. +2.850 Decl. +0.430
for a total 2.881 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.99387,0.105828,0.031969 -w
ibex-sun -t 2012/09:22:18:58:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993870,+0.105828,+0.031969
which is R.A. +173.922 Decl. +1.832
missing R.A. +179.923 Decl. -0.001 (ibex-sun)
error is R.A. +6.001 Decl. +1.833
for a total 6.273 deg
Inertial 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 -u -0.999338,0.036312,0.002094 -w
ibex-sun -t 2012/09:22:20:42:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999338,+0.036312,+0.002094
which is R.A. +177.919 Decl. +0.120
missing R.A. +179.988 Decl. -0.030 (ibex-sun)
error is R.A. +2.069 Decl. +0.150
for a total 2.074 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.999338,0.036312,0.002094 -w
ibex-sun -t 2012/09:22:22:17:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999338,+0.036312,+0.002094
which is R.A. +177.919 Decl. +0.120
missing R.A. +180.048 Decl. -0.056 (ibex-sun)
error is R.A. +2.129 Decl. +0.176
for a total 2.136 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.999338,0.036312,0.002094 -w
ibex-sun -t 2012/09:27:07:21:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999338,+0.036312,+0.002094
which is R.A. +177.919 Decl. +0.120
missing R.A. +184.081 Decl. -1.772 (ibex-sun)
error is R.A. +6.162 Decl. +1.892
for a total 6.445 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 -0.998937,-0.035564,-0.029317 -w
ibex-sun -t 2012/09:27:14:23:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.998937,-0.035564,-0.029317
which is R.A. +182.039 Decl. -1.680
missing R.A. +184.343 Decl. -1.878 (ibex-sun)
error is R.A. +2.304 Decl. +0.198
for a total 2.311 deg
[tapley at ena ~]$ ibex_rotate -o -u -0.998937,-0.035564,-0.029317 -w
ibex-sun -t 2012-10-02T07:08:07.846Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.998937,-0.035564,-0.029317
which is R.A. +182.039 Decl. -1.680
missing R.A. +188.484 Decl. -3.696 (ibex-sun)
error is R.A. +6.445 Decl. +2.016
for a total 6.746 deg
No -Lo O-mode (or any) Commands.
No overlap to orbit 179 commands apparent by manual check or
by reference to http://ibex.unh.edu/cgi-bin/ats.cgi .
Command Approval Checklist attached.
-Hi Neg collimator voltage back to operating at nominal voltage.
At 11:33 -0400 9/5/12, Ibex Mission Operations wrote:
>Guys,
> Here are the planning files and ATS for Orbit# 180
>All comments/approvals are required by 7 Sept 12 @1800 UTC
>
>Please note the following:
>1. This ATS contains NO IBEX_Lo Commands. IBEX_Lo commands for
>Orbit# 180 will be uploaded during Orbit# 178 Apogee (14 Sept 12
>@1200 UTC)
>2. All contact commands have been omitted to conserved time tagged
>command space onboard the spacecraft
>Contacts will be treated as Blind_acq contacts until we have
>successfully recovery IBEX_Lo
--
- Mark 210-379-4635
-----------------------------------------------------------------------
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