[Isocops] IBEX Orbit# 259 ATS (7 Sept 14 - 15 Sept 14) - v001 approval

Wed Aug 27 00:06:02 EDT 2014

All, 

I have looked at the orbit 259 ATS, 

IBEX_2014_250_o0259a_v001.scr 
and I approve. 

There are no constraint violations in 

IBEX_2014_250_o0259a_v001.ccvr. 

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

IBEX_2014_250_o0259a_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_250_o0259a_v001.oef, 

and as verified with ibex_orbit. 

There are two star tracker outages. The first starts at 15 Re ascending and ends about 19 hours later. Some despinning may be required due to this outage. The second starts 1/2 hour after perigee and runs for about 7 hours. No despinning should be required due to this outage. 

There is one moon in Lo FOV session. The ATS start time is about 2 hours after that in the OEF and the ATS end time is about 5 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_Orbit259Contacts.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 258 left us pointing in safe directions for the orbit 259 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.950196,0.289725,0.114833 -w ibex-sun -t 2014/09:07:13:37:10 

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. +165.840 Decl. +6.045 (ibex-sun) 

error is R.A. +2.797 Decl. +0.549 

for a total 2.834 deg 

ibex_rotate -o -u -0.950196,0.289725,0.114833 -w ibex-sun -t 2014/09:11:00:00:38 

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. +168.886 Decl. +4.740 (ibex-sun) 

error is R.A. +5.843 Decl. +1.854 

for a total 6.103 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 -0.970504,0.225022,0.08653 -w ibex-sun -t 2014/09:11:01:43:46 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.970504,+0.225022,+0.086530 

which is R.A. +166.946 Decl. +4.964 

missing R.A. +168.952 Decl. +4.713 (ibex-sun) 

error is R.A. +2.006 Decl. +0.251 

for a total 2.014 deg 

ibex_rotate -o -u -0.970504,0.225022,0.08653 -w ibex-sun -t 2014/09:11:03:18:52 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.970504,+0.225022,+0.086530 

which is R.A. +166.946 Decl. +4.964 

missing R.A. +169.012 Decl. +4.688 (ibex-sun) 

error is R.A. +2.066 Decl. +0.276 

for a total 2.077 deg 

ibex_rotate -o -u -0.970504,0.225022,0.08653 -w ibex-sun -t 2014/09:15:10:05:58 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.970504,+0.225022,+0.086530 

which is R.A. +166.946 Decl. +4.964 

missing R.A. +172.955 Decl. +3.053 (ibex-sun) 

error is R.A. +6.009 Decl. +1.911 

for a total 6.291 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 260 apogee: 

ibex_rotate -o -u -0.986037,0.156455,0.057041 -w ibex-sun -t 2014/09:15:12:11:20 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.986037,+0.156455,+0.057041 

which is R.A. +170.984 Decl. +3.270 

missing R.A. +173.033 Decl. +3.020 (ibex-sun) 

error is R.A. +2.049 Decl. +0.250 

for a total 2.061 deg 

ibex_rotate -o -u -0.986037,0.156455,0.057041 -w ibex-sun -t 2014-09-20T09:56:05.770Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.986037,+0.156455,+0.057041 

which is R.A. +170.984 Decl. +3.270 

missing R.A. +177.323 Decl. +1.125 (ibex-sun) 

error is R.A. +6.339 Decl. +2.145 

for a total 6.687 deg 

No Lo O-mode. 

There is no overlap with orbit 258 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: "Kucharek, Harald" <Harald.Kucharek at unh.edu>, "IBEX FDG" <ibex at applieddefense.com>, "OPS, ISOC" <isocops at lists.sr.unh.edu>, "Fairchild, Ken" <fair-play at comcast.net>, "Quinn, Marty" <marty.quinn at unh.edu>, "Reno, Chelle" <mreno at swri.edu>, "Angold, Nigel" <ngangold at earthlink.net>, "Paul Janzen" <paul.janzen at umontana.edu>, "Robert Lockwood" <Lockwood.Robert at Orbital.com>, "Tyler, Ryan" <tyler.ryan at orbital.com>, "Wesley, Sheral" <wesley.sheral at orbital.com>, "Perry, Tim" <perry.tim at orbital.com> 
Sent: Monday, August 25, 2014 1:24:05 PM 
Subject: IBEX Orbit# 259 ATS (7 Sept 14 - 15 Sept 14) 

Guys, 
Here are the planning files and ATS for ORbit# 259. Please respond to this email with comments,questions and approvals. 
Approvals are required before 27 Aug 14 @ 2200 UTC 
Note the following: 
1. Battery Balancing at Perigee 
Orbit# 259 PERIGEE: Battery Balancing Commands 
ECT_SetLongEclipseFlag TRUE $TIME=2014/09:15:21:30:00 
ECT_SetLongEclipseFlag FALSE $TIME=2014/09:15:23:00:00 
2. Moon in Lo FOV Commands 
2014-09-11T10:08:21.354Z,MoonInLoFovStart,orbit:259 
2014-09-12T21:36:42.992Z,MoonInLoFovStop,orbit:259 
3. Command Load Constraint Violation Report 
IBEX_2014_250_o0259a_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 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140827/71ef9f1a/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev14-o0259_KWF.doc
Type: application/msword
Size: 114176 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140827/71ef9f1a/IBEX-Command-Approval-Checklist-Rev14-o0259_KWF-0001.doc 