[Isocops] IBEX Orbit# 343 ATS Approval (9 Oct 16 - 18 Oct 16) - v001 approval

Tue Sep 27 09:01:56 EDT 2016

All, 

I have looked at the orbit 343 ATS, 

IBEX_2016_283_o0343a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_283_o0343a_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 v002 STF, 

IBEX_2016_283_o0343a_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_2016_283_o0343a_v001.oef, 

and as verified with ibex_orbit. 

There are 3 star tracker outages. The first starts 10+ hours after orbit 342 perigee and runs for about 4 hours. The second starts 2+ days after the first outage ends and runs for almost a full day. The third starts about 2 hours before perigee and runs for 3+ hours. Some despinning may be required due to the first outages. 

There are no moon in Lo FOV sessions. 

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

IBEX_Orbit343_Contacts.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 342 left us pointing in safe directions for the orbit 343 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.971114,-0.214917,-0.103678 -w ibex-sun -t 2016/10:09:20:00:56 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.971114,-0.214917,-0.103678 

which is R.A. +192.479 Decl. -5.951 

missing R.A. +195.411 Decl. -6.588 (ibex-sun) 

error is R.A. +2.932 Decl. +0.637 

for a total 2.984 deg 

ibex_rotate -o -u -0.971114,-0.214917,-0.103678 -w ibex-sun -t 2016/10:13:07:15:40 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.971114,-0.214917,-0.103678 

which is R.A. +192.479 Decl. -5.951 

missing R.A. +198.501 Decl. -7.867 (ibex-sun) 

error is R.A. +6.022 Decl. +1.916 

for a total 6.277 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 -0.950089,-0.281988,-0.133467 -w ibex-sun -t 2016/10:13:08:58:55 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.950089,-0.281988,-0.133467 

which is R.A. +196.531 Decl. -7.670 

missing R.A. +198.567 Decl. -7.893 (ibex-sun) 

error is R.A. +2.036 Decl. +0.223 

for a total 2.030 deg 

ibex_rotate -o -u -0.950089,-0.281988,-0.133467 -w ibex-sun -t 2016/10:13:10:33:54 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.950089,-0.281988,-0.133467 

which is R.A. +196.531 Decl. -7.670 

missing R.A. +198.628 Decl. -7.917 (ibex-sun) 

error is R.A. +2.097 Decl. +0.247 

for a total 2.092 deg 

ibex_rotate -o -u -0.950089,-0.281988,-0.133467 -w ibex-sun -t 2016/10:17:17:27:58 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.950089,-0.281988,-0.133467 

which is R.A. +196.531 Decl. -7.670 

missing R.A. +202.743 Decl. -9.494 (ibex-sun) 

error is R.A. +6.212 Decl. +1.824 

for a total 6.407 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 344 apogee: 

ibex_rotate -o -u -0.923415,-0.348193,-0.161449 -w ibex-sun -t 2016/10:17:19:48:46 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.923415,-0.348193,-0.161449 

which is R.A. +200.660 Decl. -9.291 

missing R.A. +202.840 Decl. -9.532 (ibex-sun) 

error is R.A. +2.180 Decl. +0.241 

for a total 2.164 deg 

ibex_rotate -o -u -0.923415,-0.348193,-0.161449 -w ibex-sun -t 2016-10-22T18:42:34.511Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.923415,-0.348193,-0.161449 

which is R.A. +200.660 Decl. -9.291 

missing R.A. +207.378 Decl. -11.305 (ibex-sun) 

error is R.A. +6.718 Decl. +2.014 

for a total 6.910 deg 

No Lo O-mode. 

There is no overlap with orbit 342 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>, "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, September 26, 2016 12:44:45 PM 
Subject: IBEX Orbit# 343 ATS Approval (9 Oct 16 - 18 Oct 16) 

Guys, 

Here are the planning files and ATS for Orbit# 343. 

Please respond to this email thread with your questions, comments and approvals 

Approvals are required before 29 Sept 16 @ 1600 UTC 

Note the following: 

1. Perigee Battery Balancing 

# Orbit# 341 Perigee Battery Balancing 

# 2016-10-18T05:10:15.050Z,Perigee,orbit:343 

@ECT_SetLongEclipseFlag TRUE $TIME=2016/10:18:05:00:00 

@ECT_SetLongEclipseFlag FALSE $TIME=2016/10:18:06:30:00 

2. Command Load Constraint Violation Report 

IBEX_2016_283_o0343a_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 2016/10/09 18:29:00 UTC 

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

transition to science mode at 2016/10/13 10:03:54 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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