[Isocops] IBEX Orbit# 165 ATS v001 - approve
Mark Tapley
mtapley at swri.edu
Mon Apr 23 10:35:06 EDT 2012
All,
I have looked at the Orbit 165 ATS v001
IBEX_2012_125_o0165a_v001.txt
and I approve.
No constraint violations per .ccvr file:
IBEX_2012_125_o0165a_v001.ccvr
The PL commands in the ATS v001 match the STF v001
IBEX_2012_125_o0165a_v001.stf
per Ken's script.
PL ascending and descending operations make sense with
respect to 15 Re ascending, Apogee, and 15 Re descending times from
IBEX_2012_125_o0165a_v001.oef
Star tracker outage from May 7 to May 10 obscures apogee
maneuver window; sun-pointing maneuver is done during this outage.
Another Star tracker outage near perigee ends in time to
allow a normal sun-pointing maneuver.
Ground station contact times and rates per
IBEX_Orbit165Contacts_v001.txt
match S/C commands for all 4 contacts.
Battery cell balancing this orbit; we skipped orbit before
last. Balancing is more than 90 minutes from anything.
Sun-pointing maneuver at the end of orbit 164 (to ~ R.A
+41.301 Dec. +15.969) left us pointing in a safe direction for
ascending and descending macros during first half of orbit:
[tapley at ena ~]$ ibex_rotate -o -r +41.301 -d +15.969 -w ibex-sun -t
2012/05:04:16:49:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.722262,+0.634545,+0.275117
which is R.A. +41.301 Decl. +15.969
missing R.A. +41.999 Decl. +16.182 (ibex-sun)
error is R.A. +0.698 Decl. +0.213
for a total 0.703 deg
[tapley at ena ~]$ ibex_rotate -o -r +41.301 -d +15.969 -w ibex-sun -t
2012/05:08:14:12:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.722262,+0.634545,+0.275117
which is R.A. +41.301 Decl. +15.969
missing R.A. +45.870 Decl. +17.251 (ibex-sun)
error is R.A. +4.569 Decl. +1.282
for a total 4.562 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 +45.940 -d +17.270 -w ibex-sun -t
2012/05:08:15:57:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.664060,+0.686214,+0.296875
which is R.A. +45.940 Decl. +17.270
missing R.A. +45.940 Decl. +17.270 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
[tapley at ena ~]$ ibex_rotate -o -r +45.940 -d +17.270 -w ibex-sun -t
2012/05:08:17:31:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.664060,+0.686214,+0.296875
which is R.A. +45.940 Decl. +17.270
missing R.A. +46.003 Decl. +17.287 (ibex-sun)
error is R.A. +0.063 Decl. +0.017
for a total 0.063 deg
[tapley at ena ~]$ ibex_rotate -o -r +45.940 -d +17.270 -w ibex-sun -t
2012/05:12:14:56:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.664060,+0.686214,+0.296875
which is R.A. +45.940 Decl. +17.270
missing R.A. +49.687 Decl. +18.285 (ibex-sun)
error is R.A. +3.747 Decl. +1.015
for a total 3.710 deg
Inertial maneuver (finally!) at perigee leaves us pointing in
a safe direction at maneuver and at following Apogee.
[tapley at ena ~]$ ibex_rotate -o -u 0.638081,0.711427,0.294491 -w
ibex-sun -t 2012/05:12:22:25:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.638081,+0.711427,+0.294491
which is R.A. +48.111 Decl. +17.127
missing R.A. +49.976 Decl. +18.367 (ibex-sun)
error is R.A. +1.865 Decl. +1.240
for a total 2.166 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.638081,0.711427,0.294491 -w
ibex-sun -t 2012-05-17T14:32:58.868Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.638081,+0.711427,+0.294491
which is R.A. +48.111 Decl. +17.127
missing R.A. +54.740 Decl. +19.460 (ibex-sun)
error is R.A. +6.629 Decl. +2.333
for a total 6.712 deg
No -Lo O-mode Commands.
No overlap to orbit 164 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 18:35 -0400 4/21/12, Ibex Mission Operations wrote:
>Guys,
> Here are the planning files and ATS for Orbit# 165
>Please respond to this email thread with comments/approvals
>Approvals and comments are due before 24 Apr 12 @ 1000 UTC
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
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Think of it as Evolution in Fast-Forward.
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