[Isocops] IBEX Orbit# 258 ATS (29 Aug 14 - 7 Sept 14) - v001 approval

Mon Aug 18 12:18:06 EDT 2014

All, 

I have looked at the orbit 258 ATS, 

IBEX_2014_241_o0258a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2014_241_o0258a_v001.ccvr. 

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

IBEX_2014_241_o0258a_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_241_o0258a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts just before perigee and ends about 11 hours later. No despinning should be required due to this outage. 

There is one moon in Lo FOV session in arc B. The ATS start time is about an hour after that in the OEF and the ATS end time is about 2 hours before that in the OEF. These differences are not unusual. 

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

IBEX_Orbit258Contacts.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 257 left us pointing in safe directions for the orbit 258 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.893226,0.416347,0.169711 -w ibex-sun -t 2014/08:29:16:44:00 

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. +157.812 Decl. +9.289 (ibex-sun) 

error is R.A. +2.803 Decl. +0.482 

for a total 2.806 deg 

ibex_rotate -o -u -0.893226,0.416347,0.169711 -w ibex-sun -t 2014/09:02:03:31:32 

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. +160.920 Decl. +8.030 (ibex-sun) 

error is R.A. +5.911 Decl. +1.741 

for a total 6.094 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 -0.923758,0.355282,0.142992 -w ibex-sun -t 2014/09:02:05:14:40 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.923758,+0.355282,+0.142992 

which is R.A. +158.963 Decl. +8.221 

missing R.A. +160.986 Decl. +8.003 (ibex-sun) 

error is R.A. +2.023 Decl. +0.218 

for a total 2.015 deg 

ibex_rotate -o -u -0.923758,0.355282,0.142992 -w ibex-sun -t 2014/09:02:06:49:46 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.923758,+0.355282,+0.142992 

which is R.A. +158.963 Decl. +8.221 

missing R.A. +161.047 Decl. +7.979 (ibex-sun) 

error is R.A. +2.084 Decl. +0.242 

for a total 2.078 deg 

ibex_rotate -o -u -0.923758,0.355282,0.142992 -w ibex-sun -t 2014/09:06:13:38:12 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.923758,+0.355282,+0.142992 

which is R.A. +158.963 Decl. +8.221 

missing R.A. +165.007 Decl. +6.408 (ibex-sun) 

error is R.A. +6.044 Decl. +1.813 

for a total 6.263 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 259 apogee: 

ibex_rotate -o -u -0.950196,0.289725,0.114833 -w ibex-sun -t 2014/09:06:15:40:32 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.950196,+0.289725,+0.114833 

which is R.A. +163.043 Decl. +6.594 

missing R.A. +165.083 Decl. +6.377 (ibex-sun) 

error is R.A. +2.040 Decl. +0.217 

for a total 2.039 deg 

ibex_rotate -o -u -0.950196,0.289725,0.114833 -w ibex-sun -t 2014-09-11T11:34:41.416Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.950196,+0.289725,+0.114833 

which is R.A. +163.043 Decl. +6.594 

missing R.A. +169.326 Decl. +4.556 (ibex-sun) 

error is R.A. +6.283 Decl. +2.038 

for a total 6.577 deg 

No Lo O-mode. 

There is no overlap with orbit 257 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: "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>, "Marty Quinn" <marty.quinn at unh.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Robert Lockwood" <Lockwood.Robert at orbital.com>, "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, August 15, 2014 10:37:11 PM 
Subject: IBEX Orbit# 258 ATS (29 Aug 14 - 7 Sept 14) 

Guys, 
Here are the planning files and ATS for Orbit# 258. Please respond to this email thread with comments and approvals. 
All approvals are required before 19 Aug 14 @1230 UTC. 

Note the following: 
1. No Battery Balancing commands 
2. Moon in Lo FOV 
2014-09-04T17:16:00.888Z,MoonInLoFovStart,orbit:258 
2014-09-05T09:13:44.901Z,MoonInLoFovStop,orbit:258 
3. Special Ops/Post-LUT Changes 
Hi negative collimator voltage set to 1400 
Hi CEMs A-C set to 1780, CEM D set to 1900 
4. Command Load Constraint Violation Report (CCVR) 
IBEX_2014_241_o0258a_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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