[Isocops] IBEX Orbit# 161 ATS v001 - approve
Mark Tapley
mtapley at swri.edu
Fri Mar 16 16:16:08 EDT 2012
All,
I have looked at the Orbit 161 ATS v001
IBEX_2012_089_o0161a_v001.txt
and I approve.
No constraint violations per .ccvr file:
IBEX_2012_089_o0161a_v001.ccvr
The PL commands in the ATS v001 match the STF v001
IBEX_2012_088_o0161a_v001.stf
per visual inspection.
PL ascending and descending operations make sense with
respect to 15 Re ascending, Apogee, and 15 Re descending times from
IBEX_2012_089_o0161a_v001.oef
Star tracker outage from the 4th to a few minutes from end of
orbit, so sun-pointing maneuver at perigee. Moon in -Lo FOV from 29th
to 30th; ATS commands are later than .oef predictions by up to 6 and
4 hours for a 20-hour period; this is normal.
Ground station contact times and rates per
IBEX_Orbit161Contacts_v001.txt
match S/C commands for all 3 contacts.
Battery cell balancing this orbit; we skipped last orbit.
True for 90 minutes, FALSE is second command.
Inertial maneuver at the end of orbit 160 left us pointing in
a safe direction for ascending and descending macros during first
half of orbit:
[tapley at ena ~]$ ibex_rotate -o -u 0.993873,0.105811,0.031934 -w
ibex-sun -t 2012/03:29:14:47:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.993873,+0.105811,+0.031934
which is R.A. +6.077 Decl. +1.830
missing R.A. +8.432 Decl. +3.644 (ibex-sun)
error is R.A. +2.355 Decl. +1.814
for a total 2.971 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.993873,0.105811,0.031934 -w
ibex-sun -t 2012/04:02:04:34:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.993873,+0.105811,+0.031934
which is R.A. +6.077 Decl. +1.830
missing R.A. +11.746 Decl. +5.010 (ibex-sun)
error is R.A. +5.669 Decl. +3.180
for a total 6.490 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 0.98198,0.177978,0.063557 -w
ibex-sun -t 2012/04:02:06:27:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.981980,+0.177978,+0.063557
which is R.A. +10.273 Decl. +3.644
missing R.A. +11.816 Decl. +5.039 (ibex-sun)
error is R.A. +1.543 Decl. +1.395
for a total 2.077 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.98198,0.177978,0.063557 -w
ibex-sun -t 2012/04:02:07:53:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.981980,+0.177978,+0.063557
which is R.A. +10.273 Decl. +3.644
missing R.A. +11.870 Decl. +5.061 (ibex-sun)
error is R.A. +1.597 Decl. +1.417
for a total 2.132 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.98198,0.177978,0.063557 -w
ibex-sun -t 2012/04:06:17:52:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.981980,+0.177978,+0.063557
which is R.A. +10.273 Decl. +3.644
missing R.A. +15.797 Decl. +6.721 (ibex-sun)
error is R.A. +5.524 Decl. +3.077
for a total 6.303 deg
Sun-pointing maneuver at perigee leaves us pointing in a safe
direction at maneuver and at following Apogee.
[tapley at ena ~]$ ibex_rotate -o -r +16.056 -d +6.837 -w ibex-sun -t
2012/04:07:00:46:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.954158,+0.274610,+0.119045
which is R.A. +16.056 Decl. +6.837
missing R.A. +16.056 Decl. +6.837 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r +16.056 -d +6.837 -w ibex-sun -t
2012-04-11T16:17:04.317Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.954158,+0.274610,+0.119045
which is R.A. +16.056 Decl. +6.837
missing R.A. +20.435 Decl. +8.572 (ibex-sun)
error is R.A. +4.379 Decl. +1.735
for a total 4.673 deg
No -Lo O-mode Commands.
No overlap to orbit 160 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 13:01 -0400 3/16/12, Ibex Mission Operations wrote:
>Guys,
> Here are the planning files and ATS for Orbit# 161.
>Please respond to this email thread with all comments/approvals.
>All comments/approvals are due before 19 Mar 12 @ 1100 UTC
>
>Note that there is a Sun Maneuver at Perigee this orbit along with
>the regular battery balancing commands
--
- Mark 210-379-4635
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