[Isocops] IBEX Orbit# 270 ATS (15 Dec 14 - 24 Dec 14) - v001 approval

Thu Dec 4 21:35:09 EST 2014

All, 

I have looked at the orbit 270 ATS, 

IBEX_2014_349_o0270a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2014_349_o0270a_v001.ccvr. 

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

IBEX_2014_349_o0270a_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_2014_349_o0270a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts about 12 hours after 15 Re ascending and ends about 43 hours later. Some despinning may be required due to this outage. 

There is one moon in Lo FOV session in arc A. The ATS start time is about 2 hours after that in the OEF and the ATS end time is about 6 1/2 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_Orbit270Contacts.txt, 

for all contacts (4). 

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

The inertial maneuver at perigee of orbit 269 left us pointing in safe directions for the orbit 270 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.094221,-0.942805,-0.319753 -w ibex-sun -t 2014/12:15:23:59:36 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.094221,-0.942805,-0.319753 

which is R.A. +264.293 Decl. -18.648 

missing R.A. +263.204 Decl. -23.296 (ibex-sun) 

error is R.A. +1.089 Decl. +4.648 

for a total 4.758 deg 

ibex_rotate -o -u -0.094221,-0.942805,-0.319753 -w ibex-sun -t 2014/12:19:15:31:39 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.094221,-0.942805,-0.319753 

which is R.A. +264.293 Decl. -18.648 

missing R.A. +267.135 Decl. -23.447 (ibex-sun) 

error is R.A. +2.842 Decl. +4.799 

for a total 5.482 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 -0.023398,-0.946574,-0.321638 -w ibex-sun -t 2014/12:19:17:14:47 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.023398,-0.946574,-0.321638 

which is R.A. +268.584 Decl. -18.762 

missing R.A. +267.213 Decl. -23.448 (ibex-sun) 

error is R.A. +1.371 Decl. +4.686 

for a total 4.857 deg 

ibex_rotate -o -u -0.023398,-0.946574,-0.321638 -w ibex-sun -t 2014/12:19:18:49:53 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.023398,-0.946574,-0.321638 

which is R.A. +268.584 Decl. -18.762 

missing R.A. +267.285 Decl. -23.449 (ibex-sun) 

error is R.A. +1.299 Decl. +4.687 

for a total 4.841 deg 

ibex_rotate -o -u -0.023398,-0.946574,-0.321638 -w ibex-sun -t 2014/12:24:05:20:08 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.023398,-0.946574,-0.321638 

which is R.A. +268.584 Decl. -18.762 

missing R.A. +272.258 Decl. -23.411 (ibex-sun) 

error is R.A. +3.674 Decl. +4.649 

for a total 5.776 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 271 apogee: 

ibex_rotate -o -u 0.068614,-0.944733,-0.32058 -w ibex-sun -t 2014/12:24:07:36:28 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.068614,-0.944733,-0.320580 

which is R.A. +274.154 Decl. -18.698 

missing R.A. +272.372 Decl. -23.409 (ibex-sun) 

error is R.A. +1.782 Decl. +4.711 

for a total 4.996 deg 

ibex_rotate -o -u 0.068614,-0.944733,-0.32058 -w ibex-sun -t 2014-12-29T07:46:07.697Z 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.068614,-0.944733,-0.320580 

which is R.A. +274.154 Decl. -18.698 

missing R.A. +277.882 Decl. -23.273 (ibex-sun) 

error is R.A. +3.728 Decl. +4.575 

for a total 5.748 deg 

No Lo O-mode. 

There is no overlap with orbit 269 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: "Kucharek, Harald" <Harald.Kucharek at unh.edu>, "IBEX FDG" <ibex at applieddefense.com>, "OPS, ISOC" <isocops at lists.sr.unh.edu>, "Fairchild, Ken" <fair-play at comcast.net>, "Quinn, Marty" <marty.quinn at unh.edu>, "Reno, Chelle" <mreno at swri.edu>, "Angold, Nigel" <ngangold at earthlink.net>, "Paul Janzen" <paul.janzen at umontana.edu>, "Robert Lockwood" <Lockwood.Robert at Orbital.com>, "Tyler, Ryan" <tyler.ryan at orbital.com>, "Wesley, Sheral" <wesley.sheral at orbital.com>, "Perry, Tim" <perry.tim at orbital.com> 
Sent: Wednesday, December 3, 2014 12:17:43 AM 
Subject: IBEX Orbit# 270 ATS (15 Dec 14 - 24 Dec 14) 

Guys, 
Here are the planning files and ATS for Orbit# 270. Please respond to this email thread with questions and approvals. 
Approvals are required before 5 Dec 14 @ 0500 UTC 

Note the following: 
1. No Battery Balancing this PERIGEE 
2. Moon in LO FOV 
2014-12-16T01:54:41.353Z,MoonInLoFovStart,orbit:270 
2014-12-18T18:01:11.802Z,MoonInLoFovStop,orbit:270 
3. 18 Dec 14 Transition Contact to monitor the payload 
IBEX,USHI01,12/18/14,22:00:00 - 23:00:00,,LAHO 2K IBEX Orbit# 270 Transition Contact 
Sheral R. Wesley 
SPVR., Satellite Operations 
IBEX Mission OPS 
CYGNUS Mission Planning 
(304) 279-6678 

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