[Isocops] IBEX Orbit# 359 ATS (5 Mar 17 - 14 Mar 17) - v001 approval

Ken Fairchild fair-play at comcast.net
Thu Feb 23 04:14:30 EST 2017


All, 

I have looked at the orbit 359 ATS, 



IBEX_2017_064_o0359a_v001.scr, 




and I approve. 




The only constraint violations in 




IBEX_2017_064_o0359a_v001.ccvr 




are from the removal of the 




ACT_SetSpinPulseProtectEnable Enable 



commands (2); the violations are expected. 




The PL commands in the v001 ATS match those in the v003 STF, 




IBEX_2017_064_o0359a_v003.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_2017_064_o0359a_v001.oef, 




and as verified with ibex_orbit. 




There is one star tracker outage. The outage starts 1 1/2+ days after apogee and runs for 2+ days. Some despinning may be required due to this outage. 




There is one moon in Lo FOV session in arc A. The ATS and OEF start times are the same and the ATS end time is about 1 1/2 hours before that in the OEF. Differences in timing are not unusual. 




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




IBEX_Orbit359_Contacts.txt, 




for all contacts (2). 




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 358 left us pointing in safe directions for the orbit 359 arc A ascending and descending sequences: 




ibex_rotate -o -u 0.970309,-0.217672,-0.105448 -w ibex-sun -t 2017/03:05:23:50:56 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.970309,-0.217672,-0.105448 

which is R.A. +347.356 Decl. -6.053 

missing R.A. +346.546 Decl. -5.780 (ibex-sun) 

error is R.A. +0.810 Decl. +0.273 

for a total 0.850 deg 




ibex_rotate -o -u 0.970309,-0.217672,-0.105448 -w ibex-sun -t 2017/03:09:14:01:31 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.970309,-0.217672,-0.105448 

which is R.A. +347.356 Decl. -6.053 

missing R.A. +349.945 Decl. -4.361 (ibex-sun) 

error is R.A. +2.589 Decl. +1.692 

for a total 3.084 deg 




The inertial precession 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 0.986557,-0.14577,-0.073865 -w ibex-sun -t 2017/03:09:15:44:39 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.986557,-0.145770,-0.073865 

which is R.A. +351.595 Decl. -4.236 

missing R.A. +350.010 Decl. -4.332 (ibex-sun) 

error is R.A. +1.585 Decl. +0.096 

for a total 1.583 deg 




ibex_rotate -o -u 0.986557,-0.14577,-0.073865 -w ibex-sun -t 2017/03:09:17:19:45 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.986557,-0.145770,-0.073865 

which is R.A. +351.595 Decl. -4.236 

missing R.A. +350.070 Decl. -4.306 (ibex-sun) 

error is R.A. +1.525 Decl. +0.070 

for a total 1.522 deg 




ibex_rotate -o -u 0.986557,-0.14577,-0.073865 -w ibex-sun -t 2017/03:14:04:18:56 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.986557,-0.145770,-0.073865 

which is R.A. +351.595 Decl. -4.236 

missing R.A. +354.042 Decl. -2.553 (ibex-sun) 

error is R.A. +2.447 Decl. +1.683 

for a total 2.966 deg 




The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 360 apogee: 




ibex_rotate -o -u 0.996385,-0.073345,-0.04287 -w ibex-sun -t 2017/03:14:06:39:09 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996385,-0.073345,-0.042870 

which is R.A. +355.790 Decl. -2.457 

missing R.A. +354.130 Decl. -2.517 (ibex-sun) 

error is R.A. +1.660 Decl. +0.060 

for a total 1.660 deg 




ibex_rotate -o -u 0.996385,-0.073345,-0.04287 -w ibex-sun -t 2017-03-19T04:10:27.504Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996385,-0.073345,-0.042870 

which is R.A. +355.790 Decl. -2.457 

missing R.A. +358.735 Decl. -0.574 (ibex-sun) 

error is R.A. +2.945 Decl. +1.883 

for a total 3.495 deg 




No Lo O-mode. 




There is no overlap with orbit 358 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: "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com> 
To: "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com>, "David Heirtzler" <dheirtzl at atlas.sr.unh.edu>, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS" <IBEXOPS at gmail.com>, "ISOC" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Ken Fairchild" <kwfairchild at gmail.com>, "Robert Lockwood" <Robert.Lockwood at OrbitalATK.com>, "Michelle Reno" <mreno at swri.edu>, "Nigel Angold" <nigel.angold at nasa.gov>, "Paul Janzen" <paul.janzen at umontana.edu>, "Timothy Perry" <Timothy.Perry at OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler at OrbitalATK.com> 
Sent: Monday, February 20, 2017 11:42:27 AM 
Subject: IBEX Orbit# 359 ATS (5 Mar 17 - 14 Mar 17) 



Guys, 

Here are the planning files and ATS for Orbit# 359. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 23 Feb 17 @ 1100 UTC 



Note the following: 

1. Perigee Battery Balancing 

Orbit# 359 PERIGEE: Battery Balancing Commands 

# 2017-03-14T15:59:49.805Z,Perigee,orbit:359 

SetLongEclipseFlag TRUE $TIME=2017/03:14:15:00:00 

SetLongEclipseFlag FALSE $TIME=2017/03:14:16:30:00 



2. Moon in Lo FOV Commands 

# 2017-03-06T01:22:26.165Z,MoonInLoFovStart,orbit:359 

# 2017-03-06T19:03:09.536Z,MoonInLoFovStop,orbit:359 







Sheral R. Wesley 

Sr Systems Engineer 

IBEX Mission OPS 

CRS/CYGNUS Mission Planning 

Bldg. 2 Room 1337 

Office (703) 406-5641 

Cell (202) 236-0802 






Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged and/or exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This communication may also contain data subject to U.S. export laws. If so, data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed, transferred, or copied, whether incorporated or in its original form, to foreign nationals residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. Data subject to the Export Administration Act may not be disseminated, distributed, transferred or copied contrary to U. S. Department of Commerce regulations. If you have received this communication in error, please notify the sender by reply e-mail and destroy the e-mail message and any physical copies made of the communication. 
Thank you. 
********************* 

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