[Isocops] IBEX Orbit# 292 ATS Approval (3 Jul 15 - 12 Jul 15) - v001 approval

Ken Fairchild fair-play at comcast.net
Sat Jun 20 15:55:50 EDT 2015


All, 

I have looked at the orbit 292 ATS, 



IBEX_2015_184_o0292a_v001.scr, 




and I approve. 




There are no constraint violations in 




IBEX_2015_184_o0292a_v001.ccvr. 




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




IBEX_2015_184_o0292a_v002.stf, 




except that the ATS has an SSR_DUMP_NEW command. This is expected as APL is being used for the 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_2015_184_o0292a_v001.oef, 




and as verified with ibex_orbit. 




There is one star tracker outage. It starts about 4 hours before perigee and ends about an hour after perigee. No despinning should be required due to this outage. 




There is one moon in Lo FOV session in arc A. The ATS start time is about 5 hours after that in the OEF and the ATS end time is about 2 1/4 hours after 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_Orbit292Contacts.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 291 left us pointing in safe directions for the orbit 292 arc A ascending and descending sequences: 




ibex_rotate -o -u -0.152836,0.91058,0.384037 -w ibex-sun -t 2015/07:03:22:42:31 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.152836,+0.910580,+0.384037 

which is R.A. +99.528 Decl. +22.584 

missing R.A. +102.433 Decl. +22.936 (ibex-sun) 

error is R.A. +2.905 Decl. +0.352 

for a total 2.702 deg 




ibex_rotate -o -u -0.152836,0.91058,0.384037 -w ibex-sun -t 2015/07:07:11:27:59 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.152836,+0.910580,+0.384037 

which is R.A. +99.528 Decl. +22.584 

missing R.A. +106.133 Decl. +22.574 (ibex-sun) 

error is R.A. +6.605 Decl. +0.010 

for a total 6.099 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 -0.224909,0.897988,0.378196 -w ibex-sun -t 2015/07:07:13:11:07 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.224909,+0.897989,+0.378196 

which is R.A. +104.061 Decl. +22.222 

missing R.A. +106.208 Decl. +22.567 (ibex-sun) 

error is R.A. +2.147 Decl. +0.345 

for a total 2.015 deg 




ibex_rotate -o -u -0.224909,0.897988,0.378196 -w ibex-sun -t 2015/07:07:14:46:13 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.224909,+0.897989,+0.378196 

which is R.A. +104.061 Decl. +22.222 

missing R.A. +106.278 Decl. +22.560 (ibex-sun) 

error is R.A. +2.217 Decl. +0.338 

for a total 2.077 deg 




ibex_rotate -o -u -0.224909,0.897988,0.378196 -w ibex-sun -t 2015/07:11:23:27:04 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.224909,+0.897989,+0.378196 

which is R.A. +104.061 Decl. +22.222 

missing R.A. +110.747 Decl. +22.079 (ibex-sun) 

error is R.A. +6.687 Decl. +0.143 

for a total 6.194 deg 




The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 293 apogee: 




ibex_rotate -o -u -0.298742,0.879461,0.370541 -w ibex-sun -t 2015/07:12:01:35:48 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.298742,+0.879461,+0.370541 

which is R.A. +108.762 Decl. +21.749 

missing R.A. +110.832 Decl. +22.068 (ibex-sun) 

error is R.A. +2.070 Decl. +0.319 

for a total 1.947 deg 




ibex_rotate -o -u -0.298742,0.879461,0.370541 -w ibex-sun -t 2015-07-17T02:20:02.605Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.298742,+0.879461,+0.370541 

which is R.A. +108.762 Decl. +21.749 

missing R.A. +115.919 Decl. +21.269 (ibex-sun) 

error is R.A. +7.157 Decl. +0.480 

for a total 6.675 deg 




No Lo O-mode. 




There is no overlap with orbit 291 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: "David Heirtzler" <dheirtzl at atlas.sr.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" <robert.lockwood at orbitalatk.com>, "Ryan Tyler" <ryan.tyler at orbitalatk.com>, "Sheral Wesley" <sheral.wesley at orbitalatk.com>, "Tim Perry" <tim.perry at orbitalatk.com> 
Sent: Friday, June 19, 2015 1:33:03 PM 
Subject: IBEX Orbit# 292 ATS Approval (3 Jul 15 - 12 Jul 15) 

Guys, 
Here are the planning files and ATS for Orbit# 292. Please respond to this email thread with your questions and approvals. 
Approvals are required before 23 June 15 @1400 UTC 
Please note the following: 
1. Battery Balancing at PERIGEE 
# 2015-07-12T11:22:05.072Z,Perigee,orbit:292 
SetLongEclipseFlag TRUE $TIME=2015/07:12:11:00:00 
SetLongEclipseFlag FALSE $TIME=2015/07:12:12:30:00 
2. Moon in Lo FOV 
# 2015-07-05T08:21:59.435Z,MoonInLoFovStart,orbit:292 
# 2015-07-06T00:35:44.136Z,MoonInLoFovStop,orbit:292 
LO_PMT_LVL 300 $TIME=2015/07:05:13:20:47 
LO_IF_STAR_ADJ 0 $TIME=2015/07:05:13:20:49 
LO_IF_STAR_ADJ 250 $TIME=2015/07:06:02:56:50 
LO_PMT_LVL 800 $TIME=2015/07:06:02:56:52 
3. APL-18 SSR_Dump/Tracking Contact 
2-320K data rate 

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

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