[Isocops] IBEX Orbit# 264 ATS (21 Oct 14 - 30 Oct 14) - v001 approval

Fri Oct 10 23:59:53 EDT 2014

All, 

I have looked at the orbit 264 ATS, 

IBEX_2014_294_o0264a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2014_294_o0264a_v001.ccvr. 

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

IBEX_2014_294_o0264a_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_294_o0264a_v001.oef, 

and as verified with ibex_orbit. 

There are two star tracker outages. The first starts at 14 Re ascending and ends about 6 hours later. The second starts about 6 1/2 hours after perigee and ends about 3 1/2 hours later. Some despinning may be required due to the first 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_Orbit264Contacts.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 263 left us pointing in safe directions for the orbit 264 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.9016,-0.39285,-0.181068 -w ibex-sun -t 2014/10:22:06:15:21 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.901600,-0.392850,-0.181068 

which is R.A. +203.544 Decl. -10.432 

missing R.A. +206.538 Decl. -10.969 (ibex-sun) 

error is R.A. +2.994 Decl. +0.537 

for a total 2.990 deg 

ibex_rotate -o -u -0.9016,-0.39285,-0.181068 -w ibex-sun -t 2014/10:25:17:57:55 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.901600,-0.392850,-0.181068 

which is R.A. +203.544 Decl. -10.432 

missing R.A. +209.750 Decl. -12.177 (ibex-sun) 

error is R.A. +6.207 Decl. +1.745 

for a total 6.331 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 -0.865511,-0.455444,-0.208475 -w ibex-sun -t 2014/10:25:19:41:03 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.865511,-0.455444,-0.208475 

which is R.A. +207.754 Decl. -12.033 

missing R.A. +209.819 Decl. -12.201 (ibex-sun) 

error is R.A. +2.065 Decl. +0.168 

for a total 2.026 deg 

ibex_rotate -o -u -0.865511,-0.455444,-0.208475 -w ibex-sun -t 2014/10:25:21:16:09 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.865511,-0.455444,-0.208475 

which is R.A. +207.754 Decl. -12.033 

missing R.A. +209.882 Decl. -12.223 (ibex-sun) 

error is R.A. +2.128 Decl. +0.190 

for a total 2.089 deg 

ibex_rotate -o -u -0.865511,-0.455444,-0.208475 -w ibex-sun -t 2014/10:30:05:08:16 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.865511,-0.455444,-0.208475 

which is R.A. +207.754 Decl. -12.033 

missing R.A. +214.183 Decl. -13.678 (ibex-sun) 

error is R.A. +6.429 Decl. +1.645 

for a total 6.480 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 265 apogee: 

ibex_rotate -o -u -0.823939,-0.515914,-0.23443 -w ibex-sun -t 2014/10:30:07:24:58 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.823939,-0.515914,-0.234430 

which is R.A. +212.053 Decl. -13.558 

missing R.A. +214.280 Decl. -13.710 (ibex-sun) 

error is R.A. +2.228 Decl. +0.152 

for a total 2.170 deg 

ibex_rotate -o -u -0.823939,-0.515914,-0.23443 -w ibex-sun -t 2014-11-04T04:36:07.655Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.823939,-0.515914,-0.234430 

which is R.A. +212.053 Decl. -13.558 

missing R.A. +218.926 Decl. -15.271 (ibex-sun) 

error is R.A. +6.873 Decl. +1.713 

for a total 6.873 deg 

No Lo O-mode. 

There is no overlap with orbit 263 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: Thursday, October 9, 2014 10:06:26 PM 
Subject: IBEX Orbit# 264 ATS (21 Oct 14 - 30 Oct 14) 

Guys, 
Here are the planning files and ATS for Orbit# 264. Please respond to this email thread with your questions, comments and approvals. 
Approvals are required before 11 Oct 14 @1900 UTC 
Pleaes note the following: 
1. no battery balancing commands at PERIGEE this orbit 
2.Command Load Constraint Violation Report 
IBEX_2014_294_o0264a_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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