[Isocops] IBEX ORbit# 230 ATS (17 Dec 13 - 26 Dec 13) - v001 approval

Sat Dec 7 03:14:34 EST 2013

All, 

I have looked at the orbit 230 ATS, 

IBEX_2013_351_o0230a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2013_351_o0230a_v001.ccvr. 

The PL commands in the v001 ATS match those in the v002 STF, 

IBEX_2013_351_o0230a_v002.stf. 

Ascending and descending command sequences are consistent with each other and 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF, 

IBEX_2013_351_o0230a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts before 15 Re descending in orbit 229 and ends about 39 hours after 15 Re ascending. Some despinning may be required due to this outage. 

There is one moon in Lo FOV session in arc B. The ATS start time is about 1 3/4 hours after that in the OEF and the ATS end time is about 3 hours before that in the OEF. These differences are not unusual. 

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, 

IBEX_Orbit230Contacts.txt, 

for all contacts (3). 

We are doing battery cell balancing this orbit and the balancing commands are correct and offset by enough time from other commands. 

The sun precession maneuver at perigee of orbit 229 left us pointing in safe directions for orbit 230 arc A ascending and descending sequences: 

ibex_rotate -o -r +264.981 -d -23.353 -w ibex-sun -t 2013/12:18:07:06:42 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.080319,-0.914560,-0.396395 
which is R.A. +264.981 Decl. -23.353 
missing R.A. +266.027 Decl. -23.390 (ibex-sun) 
error is R.A. +1.046 Decl. +0.037 
for a total 0.961 deg 

ibex_rotate -o -r +264.981 -d -23.353 -w ibex-sun -t 2013/12:21:21:31:58 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.080319,-0.914560,-0.396395 
which is R.A. +264.981 Decl. -23.353 
missing R.A. +269.907 Decl. -23.472 (ibex-sun) 
error is R.A. +4.926 Decl. +0.119 
for a total 4.522 deg 

The inertial maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for arc B ascending and descending sequences: 

ibex_rotate -o -u -0.034703,-0.9129,-0.406705 -w ibex-sun -t 2013/12:21:23:15:06 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.034703,-0.912900,-0.406705 
which is R.A. +267.823 Decl. -23.998 
missing R.A. +269.985 Decl. -23.472 (ibex-sun) 
error is R.A. +2.162 Decl. +0.526 
for a total 2.048 deg 

ibex_rotate -o -u -0.034703,-0.9129,-0.406705 -w ibex-sun -t 2013/12:22:00:50:12 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.034703,-0.912900,-0.406705 
which is R.A. +267.823 Decl. -23.998 
missing R.A. +270.057 Decl. -23.472 (ibex-sun) 
error is R.A. +2.234 Decl. +0.526 
for a total 2.112 deg 

ibex_rotate -o -u -0.034703,-0.9129,-0.406705 -w ibex-sun -t 2013/12:26:10:27:28 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.034703,-0.912900,-0.406705 
which is R.A. +267.823 Decl. -23.998 
missing R.A. +274.997 Decl. -23.355 (ibex-sun) 
error is R.A. +7.174 Decl. +0.643 
for a total 6.601 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 231 apogee: 

ibex_rotate -o -u 0.045078,-0.912539,-0.406497 -w ibex-sun -t 2013/12:26:12:33:50 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.045078,-0.912539,-0.406497 
which is R.A. +272.828 Decl. -23.985 
missing R.A. +275.102 Decl. -23.350 (ibex-sun) 
error is R.A. +2.274 Decl. +0.635 
for a total 2.177 deg 

ibex_rotate -o -u 0.045078,-0.912539,-0.406497 -w ibex-sun -t 2013-12-31T10:07:06.685Z 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.045078,-0.912539,-0.406497 
which is R.A. +272.828 Decl. -23.985 
missing R.A. +280.476 Decl. -23.122 (ibex-sun) 
error is R.A. +7.648 Decl. +0.863 
for a total 7.063 deg 

No Lo O-mode. 

There is no overlap with orbit 229 commands by manual inspection or by checking at 

http://ibex.unh.edu/cgi-bin/ats.cgi . 

Command Approval Checklist is attached. 

Ken 

----- Original Message -----
From: "Ibex Mission Operations" <ibexops at gmail.com> 
To: joe at boulder.swri.edu, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS/ORB" <IBEXops at orbital.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "John Cavallo" <cavallo.john at orbital.com>, "Ken Fairchild" <fair-play at comcast.net>, "Mark Tapley" <mtapley at swri.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Robert Lockwood" <Lockwood.Robert at Orbital.com>, "Roland Vanderspek" <roland at space.mit.edu>, "Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley" <wesley.sheral at orbital.com>, "Thomas Regiec" <regiec.thomas at orbital.com>, "Tim Perry" <perry.tim at orbital.com>, "Ed Fleming" <Fleming.Ed at orbital.com> 
Sent: Thursday, December 5, 2013 6:29:25 AM 
Subject: IBEX ORbit# 230 ATS (17 Dec 13 - 26 Dec 13) 

Guys, 
Here are the planning files and ATS for Orbit# 230. 
Please respond to this email thread with any questions,comments and approvals. 
Approvals are required before 7 Dec 13 @2200 UTC. 
The ATS will be uploaded during one of the two Orbit# 228 Perigee contacts 

Note the following: 
1. Battery Balancing commands at PERIGEE 
2. Moon in Lo Fov Commands 
2013-12-24T14:32:42.045Z,MoonInLoFovStart,orbit:230 
2013-12-25T15:27:35.000Z,MoonInLoFovStop,orbit:230 
3. Command Load Constraint Violation Report (CCVR) 
# IBEX_2013_351_o0230a_v001.scr 
========================== 
HARD CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 
========================== 
SOFT CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 
============== 
OTHER MESSAGES 
============== 
NO MESSAGES. 

-- 

Sheral R. Wesley 
SPVR., Satellite Operations 
IBEX Mission OPS 
CYGNUS Mission Planning 
(304) 279-6678 
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