[Isocops] IBEX Orbit# 158 ATS v001 - approve
Mark Tapley
mtapley at swri.edu
Mon Feb 20 10:23:11 EST 2012
All,
I have looked at the Orbit 158 ATS v001
IBEX_2012_062_o0158a_v001.txt
and I approve.
No constraint violations per .ccvr file:
IBEX_2012_062_o0158a_v001.ccvr
The PL commands in the ATS v001 match the STF v001
IBEX_2012_061_o0158a_v001.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_053_o0158a_v001.oef
Star tracker outage from the 4th through 9th, requiring
sun-pointing maneuver at apogee.
Ground station contact times and rates per
IBEX_Orbit158Contacts_v001.txt
match S/C commands for all 3 contacts.
Battery cell balancing this orbit, skipped last time. 1.5
hours, eclipse-flag FALSE is second command as appropriate.
Inertial maneuver at the end of orbit 157 left us pointing in
a safe direction for ascending and descending macros during first
half of orbit:
[tapley at ena ~]$ ibex_rotate -o -u 0.935305,-0.319333,-0.152417 -w
ibex-sun -t 2012/03:02:13:41:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.935305,-0.319333,-0.152417
which is R.A. +341.149 Decl. -8.767
missing R.A. +343.633 Decl. -6.958 (ibex-sun)
error is R.A. +2.484 Decl. +1.809
for a total 3.054 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.935305,-0.319333,-0.152417 -w
ibex-sun -t 2012/03:06:14:15:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.935305,-0.319333,-0.152417
which is R.A. +341.149 Decl. -8.767
missing R.A. +347.382 Decl. -5.445 (ibex-sun)
error is R.A. +6.233 Decl. +3.322
for a total 7.020 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+347.451 -d -5.417 -w ibex-sun -t
2012/03:06:16:04:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.971751,-0.216304,-0.094404
which is R.A. +347.451 Decl. -5.417
missing R.A. +347.451 Decl. -5.417 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r+347.451 -d -5.417 -w ibex-sun -t
2012/03:06:17:34:20
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.971751,-0.216304,-0.094404
which is R.A. +347.451 Decl. -5.417
missing R.A. +347.508 Decl. -5.393 (ibex-sun)
error is R.A. +0.057 Decl. +0.024
for a total 0.062 deg
[tapley at ena ~]$ ibex_rotate -o -r+347.451 -d -5.417 -w ibex-sun -t
2012/03:10:17:58:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.971751,-0.216304,-0.094404
which is R.A. +347.451 Decl. -5.417
missing R.A. +351.150 Decl. -3.827 (ibex-sun)
error is R.A. +3.699 Decl. +1.590
for a total 4.015 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 0.97978,-0.178091,-0.091189 -w
ibex-sun -t 2012/03:11:00:32:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.979780,-0.178091,-0.091189
which is R.A. +349.698 Decl. -5.232
missing R.A. +351.406 Decl. -3.709 (ibex-sun)
error is R.A. +1.708 Decl. +1.523
for a total 2.284 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.97978,-0.178091,-0.091189 -w
ibex-sun -t 2012-03-15T16:50:39.340Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.979780,-0.178091,-0.091189
which is R.A. +349.698 Decl. -5.232
missing R.A. +355.774 Decl. -1.865 (ibex-sun)
error is R.A. +6.076 Decl. +3.367
for a total 6.936 deg
No -Lo O-mode Commands.
No overlap to orbit 156 apparent by manual check or by
reference to http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist coming later.
-Hi Neg collimator voltage back to operating at nominal voltage.
At 20:02 -0500 2/17/12, Ibex Mission Operations wrote:
>Guys,
> Here are the planning files and ATS for Orbit #158
>Due to Orbital ORBNET maintenance this weeked, respond to this email
>thread with comments/questions.
>Approvals are due by 19 Feb @ 2100 UTC
>
Sorry for slow response, didn't check email over weekend.
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
More information about the Isocops
mailing list