[Isocops] IBEX Orbit# 351 ATS Approval - v001 approval

Sun Dec 11 09:34:04 EST 2016

All, 

I have looked at the orbit 351 ATS, 

IBEX_2016_356_o0351a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_356_o0351a_v001.ccvr 

are because we removed the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2); the violations are expected. 

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

IBEX_2016_356_o0351a_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_2016_356_o0351a_v001.oef, 

and as verified with ibex_orbit. 

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

There is one moon in Lo FOV session in arc A. The ATS start time is about 1 1/2 hours after that in the OEF and the ATS end time is about 2 1/2 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_Orbit351_Contacts.txt, 

for all contacts (2). 

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

The inertial maneuver at perigee of orbit 350 left us pointing in safe directions for the orbit 351 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.017073,-0.913279,-0.406976 -w ibex-sun -t 2016/12:21:23:28:24 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.017073,-0.913279,-0.406976 

which is R.A. +271.071 Decl. -24.015 

missing R.A. +270.379 Decl. -23.452 (ibex-sun) 

error is R.A. +0.692 Decl. +0.563 

for a total 0.847 deg 

ibex_rotate -o -u 0.017073,-0.913279,-0.406976 -w ibex-sun -t 2016/12:26:11:23:37 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.017073,-0.913279,-0.406976 

which is R.A. +271.071 Decl. -24.015 

missing R.A. +275.283 Decl. -23.373 (ibex-sun) 

error is R.A. +4.212 Decl. +0.642 

for a total 3.910 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 0.098165,-0.909089,-0.40487 -w ibex-sun -t 2016/12:26:13:07:29 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.098165,-0.909090,-0.404870 

which is R.A. +276.163 Decl. -23.883 

missing R.A. +275.361 Decl. -23.370 (ibex-sun) 

error is R.A. +0.802 Decl. +0.513 

for a total 0.896 deg 

ibex_rotate -o -u 0.098165,-0.909089,-0.40487 -w ibex-sun -t 2016/12:26:14:41:51 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.098165,-0.909090,-0.404870 

which is R.A. +276.163 Decl. -23.883 

missing R.A. +275.433 Decl. -23.367 (ibex-sun) 

error is R.A. +0.730 Decl. +0.516 

for a total 0.845 deg 

ibex_rotate -o -u 0.098165,-0.909089,-0.40487 -w ibex-sun -t 2016/12:30:07:05:30 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.098165,-0.909090,-0.404870 

which is R.A. +276.163 Decl. -23.883 

missing R.A. +279.527 Decl. -23.128 (ibex-sun) 

error is R.A. +3.364 Decl. +0.755 

for a total 3.176 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 352 apogee: 

ibex_rotate -o -u 0.181354,-0.898202,-0.400429 -w ibex-sun -t 2016/12:30:09:22:02 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.181354,-0.898202,-0.400429 

which is R.A. +281.415 Decl. -23.605 

missing R.A. +279.639 Decl. -23.122 (ibex-sun) 

error is R.A. +1.776 Decl. +0.483 

for a total 1.701 deg 

ibex_rotate -o -u 0.181354,-0.898202,-0.400429 -w ibex-sun -t 2017-01-04T09:43:36.601Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.181354,-0.898202,-0.400429 

which is R.A. +281.415 Decl. -23.605 

missing R.A. +285.180 Decl. -22.732 (ibex-sun) 

error is R.A. +3.765 Decl. +0.873 

for a total 3.569 deg 

No Lo O-mode. 

There is no overlap with orbit 350 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: "Wesley.Sheral" <sheral.wesley at orbitalatk.com> 
To: "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>, "Lockwood.Robert" <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>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com> 
Sent: Thursday, December 8, 2016 12:54:07 PM 
Subject: IBEX Orbit# 351 ATS Approval 

Guys, 

Here are the planning files and ATS for Orbit# 351 (21 Dec 16 – 30 Dec 16) 

Please respond to this email thread with your comments and approvals 

Approvals are required before 11 Dec 16 @1400 UTC 

Note the following: 

1. Moon in Lo FOV Commands 

2016-12-22T05:12:35.647Z,MoonInLoFovStart,orbit:351 

2016-12-25T14:06:21.621Z,MoonInLoFovStop,orbit:351 

Sheral R. Wesley 

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 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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