[Isocops] IBEX Orbit# 223 ATS (14 Oct 13 - 23 Oct 13) - v001 approval

Ken Fairchild fair-play at comcast.net
Fri Oct 4 00:33:16 EDT 2013


All, 


I have looked at the orbit 223 ATS, 


IBEX_2013_287_o0223a_v001.scr, 


and I approve. 


There are no constraint violations in 


IBEX_2013_287_o0223a_v001.ccvr. 


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


IBEX_2013_287_o0223a_v002.stf, 


except that the ATS has an SSR_DUMP_NEW command. However, this is expected as APL is being used for a dump pass. 


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_2013_287_o0223a_v001.oef, 


and as verified with ibex_orbit. 


There are three star tracker outages. The first starts at 14 Re ascending and ends about two hours later - about 45 minutes after 15 Re ascending. The second starts about 12 hours after 15 Re and ends about 1.5 days later. The initial part of arc A may need despinning because of these outages. The third outage starts about 4.5 hours after perigee and ends at 15 Re ascending (orbit 224). 


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_Orbit223Contacts.txt, 


for all contacts (4). 


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 222 left us pointing in safe directions for orbit 223 arc A ascending and descending sequences: 



ibex_rotate -o -u -0.948643,-0.286141,-0.134903 -w ibex-sun -t 2013/10:14:17:12:28 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.948643,-0.286141,-0.134903 
which is R.A. +196.785 Decl. -7.753 
missing R.A. +199.698 Decl. -8.314 (ibex-sun) 
error is R.A. +2.913 Decl. +0.561 
for a total 2.938 deg 



ibex_rotate -o -u -0.948643,-0.286141,-0.134903 -w ibex-sun -t 2013/10:18:08:54:15 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.948643,-0.286141,-0.134903 
which is R.A. +196.785 Decl. -7.753 
missing R.A. +203.011 Decl. -9.654 (ibex-sun) 
error is R.A. +6.226 Decl. +1.901 
for a total 6.441 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 -0.9207,-0.353958,-0.164393 -w ibex-sun -t 2013/10:18:10:37:23 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.920700,-0.353958,-0.164393 
which is R.A. +201.029 Decl. -9.462 
missing R.A. +203.079 Decl. -9.680 (ibex-sun) 
error is R.A. +2.050 Decl. +0.218 
for a total 2.033 deg 



ibex_rotate -o -u -0.9207,-0.353958,-0.164393 -w ibex-sun -t 2013/10:18:12:12:29 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.920700,-0.353958,-0.164393 
which is R.A. +201.029 Decl. -9.462 
missing R.A. +203.141 Decl. -9.705 (ibex-sun) 
error is R.A. +2.112 Decl. +0.243 
for a total 2.097 deg 



ibex_rotate -o -u -0.9207,-0.353958,-0.164393 -w ibex-sun -t 2013/10:23:00:41:24 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.920700,-0.353958,-0.164393 
which is R.A. +201.029 Decl. -9.462 
missing R.A. +207.536 Decl. -11.327 (ibex-sun) 
error is R.A. +6.507 Decl. +1.865 
for a total 6.666 deg 


The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 224 apogee: 



ibex_rotate -o -u -0.885974,-0.421412,-0.193549 -w ibex-sun -t2013/10:23:03:02:48 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.885974,-0.421412,-0.193549 
which is R.A. +205.438 Decl. -11.160 
missing R.A. +207.633 Decl. -11.362 (ibex-sun) 
error is R.A. +2.195 Decl. +0.202 
for a total 2.162 deg 



ibex_rotate -o -u -0.885974,-0.421412,-0.193549 -w ibex-sun -t2013-10-28T05:44:40.530Z 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.885974,-0.421412,-0.193549 
which is R.A. +205.438 Decl. -11.160 
missing R.A. +212.388 Decl. -13.109 (ibex-sun) 
error is R.A. +6.950 Decl. +1.949 
for a total 7.068 deg 


No Lo O-mode. 


There is no overlap with orbit 222 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: joe at boulder.swri.edu, "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>, "Ken Fairchild" <fair-play at comcast.net>, "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: Wednesday, October 2, 2013 3:53:32 AM 
Subject: IBEX Orbit# 223 ATS (14 Oct 13 - 23 Oct 13) 


Here are the planning files and ATS for ORbit# 223. 
Please respond to this email thread with your comments, questions and approvals. 
Approvals are required before 4 Oct 13 @1200 UTC 

Please note the following 
1. Eclipse 
Orbit# 223 Eclipse 
# 2013-10-22T11:33:27.674Z,PenumbraEntry,orbit:223 
# 2013-10-22T11:33:27.674Z,EclipseEntry,orbit:223,moderate:false,long:false 
# 2013-10-22T12:01:07.499Z,PenumbraExit,orbit:223 
# 2013-10-22T12:01:07.499Z,EclipseExit,orbit:223,moderate:false,long:false 

2. Battery Balancing at Perigee 
# Orbit# 223 PERIGEE: Battery Balancing 
@ECT_SetLongEclipseFlag TRUE $TIME=2013/10:23:12:00:00 
@ECT_SetLongEclipseFlag FALSE $TIME=2013/10:23:13:30:00 

3.Command Load Constraint Violation Report (CCVR) 
# IBEX_2013_287_o0223a_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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