[Isocops] IBEX Orbit# 257 ATS (20 Aug 14 - 29 Aug 14) - v001 approval

Sat Aug 9 20:19:55 EDT 2014

All, 

I have looked at the orbit 257 ATS, 

IBEX_2014_232_o0257a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2014_232_o0257a_v001.ccvr. 

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

IBEX_2014_232_o0257a_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_232_o0257a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts about one hour before perigee and ends about 5 1/2 hours later. No despinning should be required due to this outage. 

The 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_Orbit257Contacts.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 inertial maneuver at perigee of orbit 256 left us pointing in safe directions for the orbit 257 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.814998,0.535516,0.221361 -w ibex-sun -t 2014/08:20:15:49:26 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.814998,+0.535516,+0.221361 

which is R.A. +146.692 Decl. +12.789 

missing R.A. +149.513 Decl. +12.396 (ibex-sun) 

error is R.A. +2.821 Decl. +0.393 

for a total 2.781 deg 

ibex_rotate -o -u -0.814998,0.535516,0.221361 -w ibex-sun -t 2014/08:24:04:33:03 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.814998,+0.535516,+0.221361 

which is R.A. +146.692 Decl. +12.789 

missing R.A. +152.762 Decl. +11.186 (ibex-sun) 

error is R.A. +6.070 Decl. +1.603 

for a total 6.150 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 -0.855772,0.478608,0.196442 -w ibex-sun -t 2014/08:24:06:16:11 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.855772,+0.478608,+0.196442 

which is R.A. +150.783 Decl. +11.329 

missing R.A. +152.829 Decl. +11.162 (ibex-sun) 

error is R.A. +2.046 Decl. +0.167 

for a total 2.014 deg 

ibex_rotate -o -u -0.855772,0.478608,0.196442 -w ibex-sun -t 2014/08:24:07:51:17 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.855772,+0.478608,+0.196442 

which is R.A. +150.783 Decl. +11.329 

missing R.A. +152.891 Decl. +11.139 (ibex-sun) 

error is R.A. +2.108 Decl. +0.190 

for a total 2.076 deg 

ibex_rotate -o -u -0.855772,0.478608,0.196442 -w ibex-sun -t 2014/08:28:16:46:04 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.855772,+0.478608,+0.196442 

which is R.A. +150.783 Decl. +11.329 

missing R.A. +156.974 Decl. +9.632 (ibex-sun) 

error is R.A. +6.191 Decl. +1.697 

for a total 6.319 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 258 apogee: 

ibex_rotate -o -u -0.893226,0.416347,0.169711 -w ibex-sun -t 2014/08:28:18:48:09 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.893226,+0.416347,+0.169711 

which is R.A. +155.009 Decl. +9.771 

missing R.A. +157.050 Decl. +9.604 (ibex-sun) 

error is R.A. +2.041 Decl. +0.167 

for a total 2.019 deg 

ibex_rotate -o -u -0.893226,0.416347,0.169711 -w ibex-sun -t 2014-09-02T15:05:39.648Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.893226,+0.416347,+0.169711 

which is R.A. +155.009 Decl. +9.771 

missing R.A. +161.365 Decl. +7.853 (ibex-sun) 

error is R.A. +6.356 Decl. +1.918 

for a total 6.567 deg 

No Lo O-mode. 

There is no overlap with orbit 256 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: "Harold Kucharek" <Harald.Kucharek at unh.edu>, "IBEX FDG" <ibex at applieddefense.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Marty Quinn" <marty.quinn at unh.edu>, "Michelle Reno" <mreno at swri.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Paul Janzen" <paul.janzen at umontana.edu>, "Robert Lockwood" <Lockwood.Robert at orbital.com>, "Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley" <wesley.sheral at orbital.com>, "Tim Perry" <perry.tim at orbital.com> 
Sent: Thursday, August 7, 2014 11:02:44 AM 
Subject: IBEX Orbit# 257 ATS (20 Aug 14 - 29 Aug 14) 

Guys, 
Here are the planning files and ATS for Orbit# 257. 
Please respond to this email thread with comments and approvals. 
Approvals are required before 10 Aug 14 @1200 UTC 

Please note the following: 
1. Battery Balancing at Perigee 
ECT_SetLongEclipseFlag TRUE $TIME=2014/08:29:02:00:00 
ECT_SetLongEclipseFlag FALSE $TIME=2014/08:29:03:30:00 

2. Command Load Constraint Violation Report (CCVR) 
IBEX_2014_232_o0257a_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 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140810/15f15bfa/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev14-o0257_KWF.doc
Type: application/msword
Size: 111616 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140810/15f15bfa/IBEX-Command-Approval-Checklist-Rev14-o0257_KWF-0001.doc 