[Isocops] IBEX Orbit# 252 ATS (5 Jul14 - 15 Jul 14) - v001 approval

Wed Jun 25 09:44:39 EDT 2014

All, 

I have looked at the orbit 252 ATS, 

IBEX_2014_186_o0252a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2014_186_o0252a_v001.ccvr. 

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

IBEX_2014_186_o0252a_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_186_o0252a_v001.oef, 

and as verified with ibex_orbit. 

There are two star tracker outages. The first starts 1+ days before 15 Re descending and ends just before 15 Re descending (and delays the perigee maneuver by about 40 minutes). Some despinning may be required due to this outage. The second outage starts shortly before 10 Re descending and ends just after perigee. No despinning will be required due to this outage. 

There is one moon in Lo FOV session in arc A. The ATS start time is about 1 1/4 hours before that in the OEF and the ATS end time is about 5 hours after that in the OEF. These differences are not unusual. 

The ground station command sequence is correct and the timing and bit rate match those in the contacts file, 

IBEX_Orbit252Contacts.txt, 

for the apogee contact. All other contacts will be blind acquisitions. 

No battery cell balancing this orbit; we'll do it again in the next orbit. 

The inertial maneuver at perigee of orbit 251 left us pointing in safe directions for the orbit 252 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.198723,0.903093,0.380699 -w ibex-sun -t 2014/07:06:11:25:41 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.198723,+0.903093,+0.380699 

which is R.A. +102.410 Decl. +22.377 

missing R.A. +105.307 Decl. +22.687 (ibex-sun) 

error is R.A. +2.897 Decl. +0.310 

for a total 2.694 deg 

ibex_rotate -o -u -0.198723,0.903093,0.380699 -w ibex-sun -t 2014/07:10:02:03:14 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.198723,+0.903093,+0.380699 

which is R.A. +102.410 Decl. +22.377 

missing R.A. +109.081 Decl. +22.245 (ibex-sun) 

error is R.A. +6.671 Decl. +0.132 

for a total 6.173 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 -0.271268,0.887057,0.373554 -w ibex-sun -t 2014/07:10:03:46:22 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.271268,+0.887057,+0.373554 

which is R.A. +107.004 Decl. +21.935 

missing R.A. +109.156 Decl. +22.236 (ibex-sun) 

error is R.A. +2.152 Decl. +0.301 

for a total 2.017 deg 

ibex_rotate -o -u -0.271268,0.887057,0.373554 -w ibex-sun -t 2014/07:10:05:21:28 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.271268,+0.887057,+0.373554 

which is R.A. +107.004 Decl. +21.935 

missing R.A. +109.225 Decl. +22.227 (ibex-sun) 

error is R.A. +2.221 Decl. +0.292 

for a total 2.079 deg 

ibex_rotate -o -u -0.271268,0.887057,0.373554 -w ibex-sun -t 2014/07:14:14:26:35 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.271268,+0.887057,+0.373554 

which is R.A. +107.004 Decl. +21.935 

missing R.A. +113.676 Decl. +21.661 (ibex-sun) 

error is R.A. +6.672 Decl. +0.274 

for a total 6.201 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 253 apogee: 

ibex_rotate -o -u -0.34437,0.865275,0.364292 -w ibex-sun -t 2014/07:14:17:14:35 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.344370,+0.865275,+0.364292 

which is R.A. +111.702 Decl. +21.364 

missing R.A. +113.786 Decl. +21.646 (ibex-sun) 

error is R.A. +2.084 Decl. +0.282 

for a total 1.959 deg 

ibex_rotate -o -u -0.34437,0.865275,0.364292 -w ibex-sun -t 2014-07-19T14:56:56.780Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.344370,+0.865275,+0.364292 

which is R.A. +111.702 Decl. +21.364 

missing R.A. +118.726 Decl. +20.782 (ibex-sun) 

error is R.A. +7.024 Decl. +0.582 

for a total 6.579 deg 

No Lo O-mode. 

There is no overlap with orbit 251 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: "Harold Kucharek" <Harald.Kucharek at unh.edu>, "IBEX FDG" <ibex at applieddefense.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Marty Quinn" <marty.quinn at unh.edu>, "Michelle Reno" <mreno at swri.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Paul Janzen" <paul.janzen at umontana.edu>, "Robert Lockwood" <Lockwood.Robert at orbital.com>, "Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley" <wesley.sheral at orbital.com>, "Tim Perry" <perry.tim at orbital.com> 
Sent: Monday, June 23, 2014 9:43:33 AM 
Subject: Re: IBEX Orbit# 252 ATS (5 Jul14 - 15 Jul 14) 

On Sun, Jun 22, 2014 at 1:27 PM, Ibex Mission Operations < ibexops at gmail.com > wrote: 

Guys, 
Here are the planning files for Orbit# 252. 
Please respond to this email thread with your questions and approvals. 
Approvals are required before 26 June 14 @ 1400 UTC 

Note the following: 
1. No battery balancing this orbit 

2. Moon in Lo FOV 
2014-07-06T14:08:24.553Z,MoonInLoFovStart,orbit:252 
2014-07-09T14:17:40.764Z,MoonInLoFovStop,orbit:252 

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 

-- 

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

-- 

Sheral R. Wesley 
SPVR., Satellite Operations 
IBEX Mission OPS 
CYGNUS Mission Planning 
(304) 279-6678 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140625/951464f6/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev14-o0252_KWF.doc
Type: application/msword
Size: 114176 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140625/951464f6/IBEX-Command-Approval-Checklist-Rev14-o0252_KWF-0001.doc 