[Isocops] IBEX Orbit# 349 ATS Approval (2 Dec 16 - 12 Dec 16) - v001 approval

Tue Nov 22 12:43:47 EST 2016

All, 

I have looked at the orbit 349 ATS, 

IBEX_2016_337_o0349a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_337_o0349a_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_337_o0349a_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_337_o0349a_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. 

The is one moon in Lo FOV session in arc A. The ATS start time is 14+ hours after that in the OEF and the ATS end time is about 22 hours after that in the OEF. These differences are not unusual (although they are larger than usual). 

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

IBEX_Orbit349_Contacts.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 348 left us pointing in safe directions for the orbit 349 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.369238,-0.848785,-0.378455 -w ibex-sun -t 2016/12:03:07:47:57 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.369238,-0.848785,-0.378455 

which is R.A. +246.490 Decl. -22.238 

missing R.A. +249.838 Decl. -22.159 (ibex-sun) 

error is R.A. +3.348 Decl. +0.079 

for a total 3.101 deg 

ibex_rotate -o -u -0.369238,-0.848785,-0.378455 -w ibex-sun -t 2016/12:06:22:48:53 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.369238,-0.848785,-0.378455 

which is R.A. +246.490 Decl. -22.238 

missing R.A. +253.682 Decl. -22.624 (ibex-sun) 

error is R.A. +7.192 Decl. +0.386 

for a total 6.658 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 -0.261313,-0.8815,-0.393284 -w ibex-sun -t 2016/12:07:00:32:01 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.261313,-0.881500,-0.393284 

which is R.A. +253.488 Decl. -23.159 

missing R.A. +253.759 Decl. -22.631 (ibex-sun) 

error is R.A. +0.271 Decl. +0.528 

for a total 0.584 deg 

ibex_rotate -o -u -0.261313,-0.8815,-0.393284 -w ibex-sun -t 2016/12:07:02:07:07 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.261313,-0.881500,-0.393284 

which is R.A. +253.488 Decl. -23.159 

missing R.A. +253.830 Decl. -22.638 (ibex-sun) 

error is R.A. +0.342 Decl. +0.521 

for a total 0.609 deg 

ibex_rotate -o -u -0.261313,-0.8815,-0.393284 -w ibex-sun -t 2016/12:11:13:02:41 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.261313,-0.881500,-0.393284 

which is R.A. +253.488 Decl. -23.159 

missing R.A. +258.765 Decl. -23.016 (ibex-sun) 

error is R.A. +5.277 Decl. +0.143 

for a total 4.857 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 350 apogee: 

ibex_rotate -o -u -0.150617,-0.902955,-0.402475 -w ibex-sun -t 2016/12:11:15:24:49 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.150617,-0.902955,-0.402475 

which is R.A. +260.530 Decl. -23.733 

missing R.A. +258.882 Decl. -23.025 (ibex-sun) 

error is R.A. +1.648 Decl. +0.708 

for a total 1.670 deg 

ibex_rotate -o -u -0.150617,-0.902955,-0.402475 -w ibex-sun -t 2016-12-16T18:24:16.487Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.150617,-0.902955,-0.402475 

which is R.A. +260.530 Decl. -23.733 

missing R.A. +264.498 Decl. -23.370 (ibex-sun) 

error is R.A. +3.968 Decl. +0.363 

for a total 3.655 deg 

No Lo O-mode. 

There is no overlap with orbit 348 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: Monday, November 21, 2016 9:40:46 AM 
Subject: IBEX Orbit# 349 ATS Approval (2 Dec 16 - 12 Dec 16) 

Guys, 

Here are the planning files and ATS for Orbit# 349. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 23 Nov 16 @1000 UTC 

Note the following 

1. Battery Balancing 

Orbit# 349 PERIGEE: Battery Balancing Commands 

# 2016-12-12T00:38:32.779Z,Perigee,orbit:349 

SetLongEclipseFlag TRUE $TIME=2016/12:12:00:00:00 

SetLongEclipseFlag FALSE $TIME=2016/12:12:01:30:00 

2. Moon in Lo FOV 

2016-12-03T21:54:40.078Z,MoonInLoFovStart,orbit:349 

2016-12-04T14:17:56.623Z,MoonInLoFovStop,orbit:349 

3. Command Load Constraint Violation Report 

IBEX_2016_337_o0349a_v001.scr 

========================== 

HARD CONSTRAINT VIOLATIONS 

========================== 

NO VIOLATIONS. 

========================== 

SOFT CONSTRAINT VIOLATIONS 

========================== 

IBX-CLC-016: No command to enable spin pulse protection was found after 

transition to science mode at 2016/12/03 06:12:20 UTC 

IBX-CLC-016: No command to enable spin pulse protection was found after 

transition to science mode at 2016/12/07 01:37:07 UTC 

============== 

OTHER MESSAGES 

============== 

NO MESSAGES. 

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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