[Isocops] IBEX ORbit# 231 ATS (26 Dec 13 - 4 Jan 14)

Mon Dec 16 12:57:22 EST 2013

All, 

I have looked at the orbit 231 ATS, 

IBEX_2013_360_o0231a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2013_360_o0231a_v001.ccvr. 

The PL commands in the v001 ATS match those in the v003 STF, 

IBEX_2013_360_o0231a_v003.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_360_o0231a_v001.oef, 

and as verified with ibex_orbit. 

The Hi ABAB command sequences and timing look reasonable. 

There is one star tracker outage. It starts about 7 hours after 15 Re ascending and runs for over 39 hours. Some despinning may be required due to this outage. 

There is one moon in Lo FOV session in arc A. The moon event commands do not appear in the OEF. This is unusual but is probably due to different keep out angles. 

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

IBEX_Orbit231Contacts.txt, 

for the apogee contact. All other contacts will be blind acquisitions while we are doing Hi ABAB operations. 

No battery cell balancing this orbit; we'll do it again in the next orbit. 

The inertial maneuver at perigee of orbit 230 left us pointing in safe directions for orbit 231 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.045078,-0.912539,-0.406497 -w ibex-sun -t 2013/12:27:10:21:28 
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. +276.165 Decl. -23.319 (ibex-sun) 
error is R.A. +3.337 Decl. +0.666 
for a total 3.128 deg 

ibex_rotate -o -u 0.045078,-0.912539,-0.406497 -w ibex-sun -t 2013/12:30:22:34:39 
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. +279.953 Decl. -23.156 (ibex-sun) 
error is R.A. +7.125 Decl. +0.829 
for a total 6.582 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 0.156878,-0.902031,-0.402156 -w ibex-sun -t 2013/12:31:00:17:47 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.156878,-0.902031,-0.402156 
which is R.A. +279.866 Decl. -23.713 
missing R.A. +280.031 Decl. -23.151 (ibex-sun) 
error is R.A. +0.165 Decl. +0.562 
for a total 0.582 deg 

ibex_rotate -o -u 0.156878,-0.902031,-0.402156 -w ibex-sun -t 2013/12:31:01:52:53 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.156878,-0.902031,-0.402156 
which is R.A. +279.866 Decl. -23.713 
missing R.A. +280.103 Decl. -23.147 (ibex-sun) 
error is R.A. +0.237 Decl. +0.566 
for a total 0.606 deg 

ibex_rotate -o -u 0.156878,-0.902031,-0.402156 -w ibex-sun -t 2014/01:04:08:37:24 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.156878,-0.902031,-0.402156 
which is R.A. +279.866 Decl. -23.713 
missing R.A. +284.855 Decl. -22.732 (ibex-sun) 
error is R.A. +4.989 Decl. +0.981 
for a total 4.688 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 232 apogee: 

ibex_rotate -o -u 0.257068,-0.844045,-0.470642 -w ibex-sun -t 2014/01:04:10:38:37 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.257068,-0.844045,-0.470642 
which is R.A. +286.939 Decl. -28.076 
missing R.A. +284.954 Decl. -22.721 (ibex-sun) 
error is R.A. +1.985 Decl. +5.354 
for a total 5.646 deg 

ibex_rotate -o -u 0.257068,-0.844045,-0.470642 -w ibex-sun -t 2014-01-09T07:09:21 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.257068,-0.844045,-0.470642 
which is R.A. +286.939 Decl. -28.076 
missing R.A. +290.244 Decl. -22.168 (ibex-sun) 
error is R.A. +3.305 Decl. +5.908 
for a total 6.622 deg 

No Lo O-mode. 

There is no overlap with orbit 230 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>, "Harold Kucharek" <Harald.Kucharek at unh.edu>, "Paul Janzen" <Paul.Janzen at mso.umt.edu>, "Ed Fleming" <Fleming.Ed at orbital.com> 
Sent: Friday, December 13, 2013 12:59:58 PM 
Subject: IBEX ORbit# 231 ATS (26 Dec 13 - 4 Jan 14) 

Guys, 
Here are the planning files and ATS for Orbit# 231. 
Please respond to this email thread with any questions, comments and your approvals. 
All Approvals are required before 16 Dec 13 @ 1800 UTC. 

Note the following: 
1. No Battery Balancing Commands this orbit 
2. Only Apogee contact commands will be seen while we are perforing IBEX_Hi ABAB CEM Comparison testing 
PERIGEE contacts will be Blind_Acq. 
3. Command Load Constraint Violation Report (CCVR) 
# IBEX_2013_360_o0231a_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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