[Isocops] IBEX Orbit# 204 ATS (25 Apr 13 - 4 May 13) - v001 approve

fair-play at comcast.net fair-play at comcast.net
Mon Apr 15 00:28:13 EDT 2013 

All, 


I've looked at the orbit 204 ATS, 


IBEX_2013_115_o0204a_v001.scr, 


and I approve. 


There are no constraint violations in 


IBEX_2013_115_o0204a_v001.ccvr. 


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


IBEX_2013_115_o0204a_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_115_o0204a_v001.oef, 


and as verified with ibex_orbit. 


There are two star tracker outages. The first started before orbit 203 perigee and it continues until about 20 hours after apogee. The second starts 3+ days after apogee and ends just after the perigee maneuver window opens (so the maneuver is delayed a bit). 


The is one moon in Lo FOV session in arc B. The ATS start time is about 1 hour before that in the OEF and the ATS stop time is 1+ hours before 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_Orbit204Contacts.txt 


for all contacts (2). 


No battery cell balancing - the LE flag will be set during the eclipse that occurs at the very end of this orbit but the commands will be placed in the orbit 205 ATS. 


The sun precession maneuver at perigee of orbit 203 left us pointing in safe directions for orbit 204 arc A ascending and descending sequences: 



ibex_rotate -o -r +32.430 -d +13.091 -w ibex-sun -t 2013/04:25:20:17:25 
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. +33.302 Decl. +13.390 (ibex-sun) 
error is R.A. +0.872 Decl. +0.299 
for a total 0.900 deg 



ibex_rotate -o -r +32.430 -d +13.091 -w ibex-sun -t 2013/04:29:20:00:55 
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. +37.186 Decl. +14.648 (ibex-sun) 
error is R.A. +4.756 Decl. +1.557 
for a total 4.873 deg 


The sun precession 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 -r +37.257 -d +14.671 -t 2013/04:29:21:49:03 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.769978,+0.585653,+0.253268 
which is R.A. +37.257 Decl. +14.671 
missing R.A. +37.257 Decl. +14.671 (ibex-sun) 
error is R.A. +0.000 Decl. +0.000 
for a total 0.000 deg 



ibex_rotate -o -r +37.257 -d +14.671 -t 2013/04:29:23:19:09 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.769978,+0.585653,+0.253268 
which is R.A. +37.257 Decl. +14.671 
missing R.A. +37.316 Decl. +14.690 (ibex-sun) 
error is R.A. +0.059 Decl. +0.019 
for a total 0.060 deg 



ibex_rotate -o -r +37.257 -d +14.671 -t 2013/05:03:22:19:19 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.769978,+0.585653,+0.253268 
which is R.A. +37.257 Decl. +14.671 
missing R.A. +40.979 Decl. +15.871 (ibex-sun) 
error is R.A. +3.722 Decl. +1.200 
for a total 3.785 deg 


The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 205 apogee: 



ibex_rotate -o -u 0.746913,0.61398,0.255243 -w ibex-sun -t 2013/05:04:01:00:28 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.746913,+0.613980,+0.255243 
which is R.A. +39.421 Decl. +14.788 
missing R.A. +41.080 Decl. +15.904 (ibex-sun) 
error is R.A. +1.659 Decl. +1.116 
for a total 1.951 deg 



ibex_rotate -o -u 0.746913,0.61398,0.255243 -w ibex-sun -t 2013-05-08T22:08:22.020Z 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI +0.746913,+0.613980,+0.255243 
which is R.A. +39.421 Decl. +14.788 
missing R.A. +45.938 Decl. +17.269 (ibex-sun) 
error is R.A. +6.517 Decl. +2.481 
for a total 6.736 deg 


No Lo O-mode. 


There is no overlap with orbit 203 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: Friday, April 12, 2013 10:06:48 PM 
Subject: [Isocops] IBEX Orbit# 204 ATS (25 Apr 13 - 4 May 13) 


Guys, 
Here are the planning files and ATS for Orbit# 204 (25 Apr 13 - 4 May 13) 
Please respond to this email thread with your comments/approvals. All comments/approvals are required before 15 Apr 13 @1800 UTC 

Note the following: 
1. No Battery Balancing commands 
2. Only two contacts 
3. Sun Maneuver at APOGEE 
-The star tracker outage started at 14_re Desc in Orbit# 203 
2013-04-24T20:00:00.000Z,StarTrackerOutageStart,orbit:203,dueTo:moon 
2013-04-30T17:52:58.114Z,StarTrackerOutageStop,orbit:204,dueTo:moon 
4. Moderate Eclipse commands will start in ORbit# 205 ATS 
2013-05-04T19:45:49.816Z,PenumbraEntry,orbit:204 
2013-05-04T19:45:49.816Z,EclipseEntry,orbit:204,moderate:true,long:false 

2013-05-04T20:52:24.206Z,PenumbraExit,orbit:204 
2013-05-04T20:52:24.206Z,EclipseExit,orbit:204,moderate:true,long:false 

5. Command Load Constraint Violation Report (CCVR) 
# IBEX_2013_115_o0204a_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 
(304) 279-6678 

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