[Isocops] IBEX Orbit# 203 ATS (15 Apr 13 - 25 Apr 13) - v001 approve

fair-play at comcast.net fair-play at comcast.net
Thu Apr 4 14:05:27 EDT 2013 

All, 


I've looked at the orbit 203 ATS, 


IBEX_2013_105_o0203a_v001.scr, 


and I approve. 


There are no constraint violations in 


IBEX_2013_105_o0203a_v001.ccvr. 


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


IBEX_2013_106_o0203a_v001.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 file, 


IBEX_2013_105_o0203a_v001.oef, 


and as verified with ibex_orbit. 


There is a star tracker outage that starts 2- days before perigee and it runs past apogee of orbit 204. 


There is one moon in Lo FOV session in arc A. The ATS start time is 8+ hours after that in the OEF and the ATS end time is about 4.5 hours after that in the OEF. These differences are not unusual. 


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


IBEX_Orbit203Contacts.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 202 left us pointing in safe directions for orbit 203 arc A ascending and descending sequences: 



ibex_rotate -o -u 0.915699,0.37259,0.150571 -w ibex-sun -t 2013/04:16:11:55:45 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.915699,+0.372590,+0.150571 
which is R.A. +22.141 Decl. +8.660 
missing R.A. +24.571 Decl. +10.219 (ibex-sun) 
error is R.A. +2.430 Decl. +1.559 
for a total 2.859 deg 



ibex_rotate -o -u 0.915699,0.37259,0.150571 -w ibex-sun -t 2013/04:20:04:28:38 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.915699,+0.372590,+0.150571 
which is R.A. +22.141 Decl. +8.660 
missing R.A. +28.096 Decl. +11.504 (ibex-sun) 
error is R.A. +5.955 Decl. +2.844 
for a total 6.516 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 0.880474,0.438854,0.179369 -w ibex-sun -t 2013/04:20:06:11:46 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.880474,+0.438854,+0.179369 
which is R.A. +26.493 Decl. +10.333 
missing R.A. +28.163 Decl. +11.528 (ibex-sun) 
error is R.A. +1.670 Decl. +1.195 
for a total 2.029 deg 



ibex_rotate -o -u 0.880474,0.438854,0.179369 -w ibex-sun -t 2013/04:20:07:46:52 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.880474,+0.438854,+0.179369 
which is R.A. +26.493 Decl. +10.333 
missing R.A. +28.224 Decl. +11.551 (ibex-sun) 
error is R.A. +1.731 Decl. +1.218 
for a total 2.091 deg 



ibex_rotate -o -u 0.880474,0.438854,0.179369 -w ibex-sun -t 2013/04:24:20:38:49 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.880474,+0.438854,+0.179369 
which is R.A. +26.493 Decl. +10.333 
missing R.A. +32.345 Decl. +13.060 (ibex-sun) 
error is R.A. +5.852 Decl. +2.727 
for a total 6.346 deg 


The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver at at orbit 204 apogee: 



ibex_rotate -o -r +32.430 -d +13.091 -w ibex-sun -t 2013/04:24:22:54:05Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.822112,+0.522332,+0.226498 
which is R.A. +32.430 Decl. +13.091 
missing R.A. +32.430 Decl. +13.091 (ibex-sun) 
error is R.A. +0.000 Decl. +0.000 
for a total 0.000 deg 



ibex_rotate -o -r +32.430 -d +13.091 -w ibex-sun -t 2013-04-29T21:35:22.173Z 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.822112,+0.522332,+0.226498 
which is R.A. +32.430 Decl. +13.091 
missing R.A. +37.248 Decl. +14.668 (ibex-sun) 
error is R.A. +4.818 Decl. +1.577 
for a total 4.936 deg 


No Lo O-mode. 


There is no overlap with orbit 202 commands by manual inspection or by checking at 


http://ibex.unh.edu/cgi-bin/ats.cgi . 



Command Approval Checklists are attached. 


Ken 
----- Original Message -----
From: "Ibex Mission Operations" <ibexops at gmail.com> 
To: "Bret Hautamaki" <hautamaki.bret at orbital.com>, "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>, "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: Tuesday, April 2, 2013 1:39:25 PM 
Subject: [Isocops] IBEX Orbit# 203 ATS (15 Apr 13 - 25 Apr 13) 


Guys, 
Here are the planning files and ATS for ORbit# 203. 
Please respond to this email thread with all comments/approvals. 
All comments/approvals are required before 5 Apr 13 @ 1800 UTC 

Note the following: 
1. Moon in Lo FOV 
# 2013-04-17T14:17:53.366Z,MoonInLoFovStart,orbit:203 
# 2013-04-18T17:25:56.084Z,MoonInLoFovStop,orbit:203 
2. PERIGEE Sun Maneuver 
# 2013-04-23T10:39:53.197Z,StarTrackerOutageStart,orbit:203,dueTo:overlap 
# 2013-04-25T18:50:00.000Z,StarTrackerOutageStop,orbit:203,dueTo:overlap 
3. Battery Balancing during PERIGEE 
4. Command Constraint Violations 
# IBEX_2013_105_o0203a_v001.scr 
========================== 
HARD CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 
========================== 
SOFT CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 




-- 
Sheral R. Wesley 
SPVR., Satellite Operations 
IBEX Mission OPS 
(304) 279-6678 

Please restrict discussions on this email list to non-ITAR sensitive topics. 
______________________________________________ 
Isocops mailing list 
Isocops at lists.sr.unh.edu 
http://lists.sr.unh.edu/mailman/listinfo/isocops 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20130404/b2c880be/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev11-o0203_KWF.doc
Type: application/msword
Size: 81408 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20130404/b2c880be/IBEX-Command-Approval-Checklist-Rev11-o0203_KWF-0001.doc 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Sun-Maneuver-Checklist-Rev8-o0203-Perigee_KWF.doc
Type: application/msword
Size: 74752 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20130404/b2c880be/IBEX-Sun-Maneuver-Checklist-Rev8-o0203-Perigee_KWF-0001.doc

More information about the Isocops mailing list