[Isocops] IBEX Orbit# 344 ATS Approval (18 Oct 16 - 27 Oct 16) - v001 approval

Fri Oct 7 00:39:07 EDT 2016

All, 

I have looked at the orbit 344 ATS, 

IBEX_2016_292_o0344a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_292_o0344a_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_292_o0344a_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_2016_292_o0344a_v001.oef, 

and as verified with ibex_orbit. 

There are no star tracker outages. 

There is one moon in Lo FOV session that starts in arc A and ends in arc B. The ATS start time is about 10 hours after that in the OEF and the ATS end time is about 4 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_Orbit344_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 343 left us pointing in safe directions for the orbit 344 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.923415,-0.348193,-0.161449 -w ibex-sun -t 2016/10:18:16:49:15 

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. +203.649 Decl. -9.880 (ibex-sun) 

error is R.A. +2.989 Decl. +0.589 

for a total 3.006 deg 

ibex_rotate -o -u -0.923415,-0.348193,-0.161449 -w ibex-sun -t 2016/10:22:07:09:11 

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. +206.923 Decl. -11.141 (ibex-sun) 

error is R.A. +6.263 Decl. +1.850 

for a total 6.435 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 -0.890065,-0.414023,-0.190706 -w ibex-sun -t 2016/10:22:08:52:19 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.890065,-0.414023,-0.190706 

which is R.A. +204.946 Decl. -10.994 

missing R.A. +206.990 Decl. -11.165 (ibex-sun) 

error is R.A. +2.044 Decl. +0.171 

for a total 2.013 deg 

ibex_rotate -o -u -0.890065,-0.414023,-0.190706 -w ibex-sun -t 2016/10:22:10:27:25 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.890065,-0.414023,-0.190706 

which is R.A. +204.946 Decl. -10.994 

missing R.A. +207.053 Decl. -11.188 (ibex-sun) 

error is R.A. +2.107 Decl. +0.194 

for a total 2.076 deg 

ibex_rotate -o -u -0.890065,-0.414023,-0.190706 -w ibex-sun -t 2016/10:26:20:34:52 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.890065,-0.414023,-0.190706 

which is R.A. +204.946 Decl. -10.994 

missing R.A. +211.400 Decl. -12.707 (ibex-sun) 

error is R.A. +6.454 Decl. +1.713 

for a total 6.544 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 345 apogee: 

ibex_rotate -o -u -0.85141,-0.47732,-0.217411 -w ibex-sun -t 2016/10:26:22:56:38 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.851410,-0.477320,-0.217411 

which is R.A. +209.276 Decl. -12.557 

missing R.A. +211.501 Decl. -12.743 (ibex-sun) 

error is R.A. +2.225 Decl. +0.186 

for a total 2.179 deg 

ibex_rotate -o -u -0.85141,-0.47732,-0.217411 -w ibex-sun -t 2016-10-31T20:06:43.763Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.851410,-0.477320,-0.217411 

which is R.A. +209.276 Decl. -12.557 

missing R.A. +216.111 Decl. -14.362 (ibex-sun) 

error is R.A. +6.835 Decl. +1.805 

for a total 6.887 deg 

No Lo O-mode. 

There is no overlap with orbit 343 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: Tuesday, October 4, 2016 10:28:17 PM 
Subject: IBEX Orbit# 344 ATS Approval (18 Oct 16 - 27 Oct 16) 

From: Wesley.Sheral 
Sent: Tuesday, October 04, 2016 10:26 PM 
To: 'David Heirtzler'; 'IBEX-FDG'; 'IBEXOPS'; 'ISOC'; 'Ken Fairchild'; Lockwood.Robert; 'Michelle Reno'; 'Nigel Angold'; 'Paul Janzen'; Perry.Tim; Tyler.Ryan; Wesley.Sheral 
Subject: 

Guys, 

Here are the planning files and ATS for Orbit# 344. 

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

Approvals are required before 8 Oct @1400 UTC 

Note the following: 

1. Battery Balancing at PERIGEE 

Orbit# 344 Perigee Battery Balancing 

# 2016-10-27T08:16:10.185Z,Perigee,orbit:344 

SetLongEclipseFlag TRUE $TIME=2016/10:27:08:00:00 

SetLongEclipseFlag FALSE $TIME=2016/10:27:09:30:00 

2. Moon in Lo FOV 

2016-10-21T16:25:08.053Z,MoonInLoFovStart,orbit:344 

2016-10-23T07:54:24.402Z,MoonInLoFovStop,orbit:344 

3. APL-18 SSR_Dump Contact(2-320k) 

4. Command Load Constraint Violation Report 

IBEX_2016_292_o0344a_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 2016/10/18 15:11:16 UTC 

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

transition to science mode at 2016/10/22 09:57:25 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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