[Isocops] IBEX Orbit #341 ATS for Review (21 - 30 Sept) Rev 2 - v002 approval

Mon Sep 12 12:59:21 EDT 2016

All, 

I have looked at the orbit 341 ATS, 

IBEX_2016_265_o0341a_v002.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_265_o0341a_v002.ccvr 

are because we removed the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2); the violations are expected. 

The PL commands in the v002 ATS match those in the v002 STF, 

IBEX_2016_265_o0341a_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_265_o0341a_v002.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. The outage starts 5 hours after perigee and runs for 6 hours. No despinning should be required due to this outage. 

There is a moon in Lo FOV session in arc A. The ATS start time is 7 hours after that in the OEF and the ATS end time is about 3 1/2 hours after 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_Orbit341_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 340 left us pointing in safe directions for the orbit 341 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.997878,0.062921,0.016754 -w ibex-sun -t 2016/09:21:23:59:59 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.997878,+0.062921,+0.016754 
which is R.A. +176.392 Decl. +0.960 
missing R.A. +179.240 Decl. +0.312 (ibex-sun) 
error is R.A. +2.848 Decl. +0.648 
for a total 2.921 deg 

ibex_rotate -o -u -0.997878,0.062921,0.016754 -w ibex-sun -t 2016/09:25:12:16:25 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.997878,+0.062921,+0.016754 
which is R.A. +176.392 Decl. +0.960 
missing R.A. +182.306 Decl. -1.034 (ibex-sun) 
error is R.A. +5.914 Decl. +1.994 
for a total 6.241 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 -0.999878,-0.006684,-0.014102 -w ibex-sun -t 2016/09:25:13:59:33 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.999878,-0.006684,-0.014102 
which is R.A. +180.383 Decl. -0.808 
missing R.A. +182.371 Decl. -1.061 (ibex-sun) 
error is R.A. +1.988 Decl. +0.253 
for a total 2.003 deg 

ibex_rotate -o -u -0.999878,-0.006684,-0.014102 -w ibex-sun -t 2016/09:25:15:34:39 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.999878,-0.006684,-0.014102 
which is R.A. +180.383 Decl. -0.808 
missing R.A. +182.430 Decl. -1.087 (ibex-sun) 
error is R.A. +2.047 Decl. +0.279 
for a total 2.066 deg 

ibex_rotate -o -u -0.999878,-0.006684,-0.014102 -w ibex-sun -t 2016/09:30:00:08:20 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.999878,-0.006684,-0.014102 
which is R.A. +180.383 Decl. -0.808 
missing R.A. +186.484 Decl. -2.782 (ibex-sun) 
error is R.A. +6.101 Decl. +1.974 
for a total 6.409 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 342 apogee: 

ibex_rotate -o -u -0.995985,-0.077826,-0.04423 -w ibex-sun -t 2016/09:30:02:26:29 
Quaternion +0.000000,+0.000000,+0.000000,+0.000000 
points axis +1.000000,+0.000000,+0.000000 
towards ECI -0.995985,-0.077826,-0.044230 
which is R.A. +184.468 Decl. -2.535 
missing R.A. +186.574 Decl. -2.822 (ibex-sun) 
error is R.A. +2.106 Decl. +0.287 
for a total 2.123 deg 

ibex_rotate -o -u -0.995985,-0.077826,-0.04423 -w ibex-sun -t 2016-10-04T22:02:19.675Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.995985,-0.077826,-0.044230 

which is R.A. +184.468 Decl. -2.535 

missing R.A. +190.813 Decl. -4.679 (ibex-sun) 

error is R.A. +6.345 Decl. +2.144 

for a total 6.685 deg 

No Lo O-mode. 

There is no overlap with orbit 340 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: "Perry.Tim" <tim.perry at orbitalatk.com> 
To: "David Heirtzler" <dfh at cisunix.unh.edu>, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS" <IBEXOPS at gmail.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Lockwood.Robert" <robert.lockwood at orbitalatk.com>, "Nigel Angold" <nigel.angold at nasa.gov>, "Paul Janzen" <paul.janzen at umontana.edu>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Michelle Reno" <mreno at swri.edu>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com> 
Sent: Sunday, September 11, 2016 9:03:35 AM 
Subject: IBEX Orbit #341 ATS for Review (21 - 30 Sept) Rev 2 

All, 

Attached are the planning products for Orbit #341 Revision # 2 

Please respond to this email thread with your comments and approvals. 

Note the following: 

1. Battery Balancing 

# Orbit# 341 Perigee Battery Balancing 

# 2016-09-30T12:01:37.288Z,Perigee,orbit:341 

@ECT_SetLongEclipseFlag TRUE $TIME=2016/09:30:11:00:00 

@ECT_SetLongEclipseFlag FALSE $TIME=2016/09:30:12:30:00 

2. Moon in Lo FOV Orbit# 341 Moon In Lo Fov 

#Orbit# 341 Moon In Lo Fov 

#2016-09-22T20:26:40.038Z,MoonInLoFovStart,orbit:341 

#2016-09-23T19:58:05.140Z,MoonInLoFovStop,orbit:341 

3. Constraint Violations: 

IBEX_2016_265_o0341a_v002.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 2016/09/21 22:30:10 UTC 

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

transition to science mode at 2016/09/25 15:04:39 UTC 

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

OTHER MESSAGES 

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

NO MESSAGES. 

Timothy E.Perry 

CRS, IBEX & OCO-2 

Mission Operations 

tim.perry at orbitalatk.com 

Office (703) 406-5976 

Cell (301) 606-1430 

Corp Cell (571)-447-8977 

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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