[Isocops] IBEX Orbit# 215 ATS (1 Aug 13 - 10 Aug 13) - v001 approval

Mon Jul 22 02:11:05 EDT 2013

All, 

I have looked at the orbit 215 ATS, 

IBEX_2013_213_o0215a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2013_213_o0215a_v001.ccvr. 

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

IBEX_2013_213_o0215a_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 file, 

IBEX_2013_213_o0215a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts about 3 hours before perigee and ends about 1 1/2 hours after perigee. This means that neither arc should need despinning because of the outage. 

There are no moon in Lo FOV sessions for this orbit. 

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

IBEX_Orbit215Contacts.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 214 left us pointing in safe directions for orbit 215 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.603354,0.735607,0.307971 -w ibex-sun -t 2013/08:02:03:14:33 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.603354,+0.735607,+0.307971 
which is R.A. +129.359 Decl. +17.937 
missing R.A. +132.224 Decl. +17.796 (ibex-sun) 
error is R.A. +2.865 Decl. +0.141 
for a total 2.730 deg 

ibex_rotate -o -u -0.603354,0.735607,0.307971 -w ibex-sun -t 2013/08:05:17:07:32 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.603354,+0.735607,+0.307971 
which is R.A. +129.359 Decl. +17.937 
missing R.A. +135.711 Decl. +16.807 (ibex-sun) 
error is R.A. +6.352 Decl. +1.130 
for a total 6.166 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 -0.661063,0.692344,0.289232 -w ibex-sun -t 2013/08:05:18:50:40 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.661063,+0.692344,+0.289232 
which is R.A. +133.676 Decl. +16.812 
missing R.A. +135.781 Decl. +16.787 (ibex-sun) 
error is R.A. +2.105 Decl. +0.025 
for a total 2.015 deg 

ibex_rotate -o -u -0.661063,0.692344,0.289232 -w ibex-sun -t 2013/08:05:20:25:46 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.661063,+0.692344,+0.289232 
which is R.A. +133.676 Decl. +16.812 
missing R.A. +135.846 Decl. +16.769 (ibex-sun) 
error is R.A. +2.170 Decl. +0.043 
for a total 2.078 deg 

ibex_rotate -o -u -0.661063,0.692344,0.289232 -w ibex-sun -t 2013/08:10:05:43:43 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.661063,+0.692344,+0.289232 
which is R.A. +133.676 Decl. +16.812 
missing R.A. +140.067 Decl. +15.550 (ibex-sun) 
error is R.A. +6.391 Decl. +1.262 
for a total 6.266 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 216 apogee: 

ibex_rotate -o -u -0.717036,0.64345,0.268012 -w ibex-sun -t 2013/08:10:07:40:56 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.717036,+0.643450,+0.268012 
which is R.A. +138.096 Decl. +15.546 
missing R.A. +140.141 Decl. +15.529 (ibex-sun) 
error is R.A. +2.045 Decl. +0.017 
for a total 1.970 deg 

ibex_rotate -o -u -0.717036,0.64345,0.268012 -w ibex-sun -t 2013-08-15T05:09:31 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.717036,+0.643450,+0.268012 
which is R.A. +138.096 Decl. +15.546 
missing R.A. +144.711 Decl. +14.025 (ibex-sun) 
error is R.A. +6.615 Decl. +1.521 
for a total 6.574 deg 

No Lo O-mode. 

There is no overlap with orbit 214 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: "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, July 19, 2013 9:28:27 AM 
Subject: [Isocops] IBEX Orbit# 215 ATS (1 Aug 13 - 10 Aug 13) 

Guys, 
Here are the the planning files and ATS for Orbit #215 
All comments/approvals are required before 22 July 13 @1200 UTC 

Please note the following: 
1. Battery Balancing at PERIGEE 
2. Command Load Constraint Violation Report (CCVR) 
# IBEX_2013_213_o0215a_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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