[Isocops] IBEX Orbit# 228 ATS (29 Nov 13 - 8 Dec 13)

Tue Nov 19 00:45:23 EST 2013

All, 

I have looked at the orbit 228 ATS, 

IBEX_2013_333_o0228a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2013_333_o0228a_v001.ccvr. 

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

IBEX_2013_333_o0228a_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_333_o0228a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts about 1/2 hour before 15 Re ascending and ends about 23 hours later. Some despinning may be required due to this outage. 

There are no moon in Lo FOV sessions. 

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

IBEX_Orbit228Contacts.txt, 

for all contacts (3). 

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

The inertial maneuver at perigee of orbit 227 left us pointing in safe directions for orbit 228 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.423592,-0.827094,-0.369439 -w ibex-sun -t 2013/11:30:05:01:52 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.423592,-0.827094,-0.369439 
which is R.A. +242.881 Decl. -21.681 
missing R.A. +246.206 Decl. -21.637 (ibex-sun) 
error is R.A. +3.325 Decl. +0.044 
for a total 3.091 deg 

ibex_rotate -o -u -0.423592,-0.827094,-0.369439 -w ibex-sun -t 2013/12:03:19:30:46 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.423592,-0.827094,-0.369439 
which is R.A. +242.881 Decl. -21.681 
missing R.A. +249.971 Decl. -22.195 (ibex-sun) 
error is R.A. +7.090 Decl. +0.514 
for a total 6.596 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 -0.348346,-0.855987,-0.382022 -w ibex-sun -t 2013/12:03:21:13:54 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.348346,-0.855987,-0.382022 
which is R.A. +247.856 Decl. -22.459 
missing R.A. +250.048 Decl. -22.205 (ibex-sun) 
error is R.A. +2.192 Decl. +0.254 
for a total 2.043 deg 

ibex_rotate -o -u -0.348346,-0.855987,-0.382022 -w ibex-sun -t 2013/12:03:22:49:00 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.348346,-0.855987,-0.382022 
which is R.A. +247.856 Decl. -22.459 
missing R.A. +250.119 Decl. -22.214 (ibex-sun) 
error is R.A. +2.263 Decl. +0.245 
for a total 2.107 deg 

ibex_rotate -o -u -0.348346,-0.855987,-0.382022 -w ibex-sun -t 2013/12:08:07:32:22 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.348346,-0.855987,-0.382022 
which is R.A. +247.856 Decl. -22.459 
missing R.A. +254.974 Decl. -22.715 (ibex-sun) 
error is R.A. +7.118 Decl. +0.256 
for a total 6.576 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 229 apogee: 

ibex_rotate -o -u -0.273158,-0.878577,-0.391775 -w ibex-sun -t 2013/12:08:09:40:32 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.273158,-0.878577,-0.391775 
which is R.A. +252.729 Decl. -23.065 
missing R.A. +255.079 Decl. -22.724 (ibex-sun) 
error is R.A. +2.350 Decl. +0.341 
for a total 2.192 deg 

ibex_rotate -o -u -0.273158,-0.878577,-0.391775 -w ibex-sun -t 2013-12-13T07:40:54.854Z 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.273158,-0.878577,-0.391775 
which is R.A. +252.729 Decl. -23.065 
missing R.A. +260.389 Decl. -23.177 (ibex-sun) 
error is R.A. +7.660 Decl. +0.112 
for a total 7.045 deg 

No Lo O-mode. 

There is no overlap with orbit 227 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> 
Sent: Saturday, November 16, 2013 3:53:11 AM 
Subject: IBEX Orbit# 228 ATS (29 Nov 13 - 8 Dec 13) 

Guys, 
Here are the planning files and ATS for Orbit# 228. 
Please respond to this email thread with all comments, questions and approvals. 
Approvals are required before 19 Nov 13 @1200 UTC 

Note the following: 

Command Load Constraint Violation Report (CCVR) 

IBEX_2013_333_o0228a_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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