[Isocops] IBEX ORbit# 347 ATS Approval (14 Nov 16 - 23 Nov 16) - v001 approval

Wed Nov 2 10:40:10 EDT 2016

All, 

I have looked at the orbit 347 ATS, 

IBEX_2016_319_o0347a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_319_o0347a_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_319_o0347a_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_319_o0347a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts at orbit 346 apogee and runs until about a day after 15 Re ascending. Some despinning may be required due to this outage. 

There is one moon in Lo FOV session in arc B. The ATS start time is about 2 hours after that in the OEF and the ATS end time is about 3 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_Orbit347_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 sun precession maneuver at perigee of orbit 346 left us pointing in safe directions for the orbit 347 arc A ascending and descending sequences: 

ibex_rotate -o -r +229.377 -d -18.194 -w ibex-sun -t 2016/11:14:19:58:46 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.618528,-0.721063,-0.312235 

which is R.A. +229.377 Decl. -18.194 

missing R.A. +230.276 Decl. -18.454 (ibex-sun) 

error is R.A. +0.899 Decl. +0.260 

for a total 0.892 deg 

ibex_rotate -o -r +229.377 -d -18.194 -w ibex-sun -t 2016/11:18:13:03:30 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.618528,-0.721063,-0.312235 

which is R.A. +229.377 Decl. -18.194 

missing R.A. +233.984 Decl. -19.358 (ibex-sun) 

error is R.A. +4.607 Decl. +1.164 

for a total 4.515 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 -0.581736,-0.742102,-0.332968 -w ibex-sun -t 2016/11:18:14:46:38 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.581736,-0.742102,-0.332968 

which is R.A. +231.907 Decl. -19.449 

missing R.A. +234.058 Decl. -19.374 (ibex-sun) 

error is R.A. +2.151 Decl. +0.075 

for a total 2.030 deg 

ibex_rotate -o -u -0.581736,-0.742102,-0.332968 -w ibex-sun -t 2016/11:18:16:21:44 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.581736,-0.742102,-0.332968 

which is R.A. +231.907 Decl. -19.449 

missing R.A. +234.126 Decl. -19.389 (ibex-sun) 

error is R.A. +2.219 Decl. +0.060 

for a total 2.093 deg 

ibex_rotate -o -u -0.581736,-0.742102,-0.332968 -w ibex-sun -t 2016/11:23:04:45:03 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.581736,-0.742102,-0.332968 

which is R.A. +231.907 Decl. -19.449 

missing R.A. +238.946 Decl. -20.354 (ibex-sun) 

error is R.A. +7.039 Decl. +0.905 

for a total 6.680 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 348 apogee: 

ibex_rotate -o -u -0.514158,-0.783058,-0.349946 -w ibex-sun -t 2016/11:23:07:08:14 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.514158,-0.783058,-0.349946 

which is R.A. +236.711 Decl. -20.484 

missing R.A. +239.059 Decl. -20.377 (ibex-sun) 

error is R.A. +2.348 Decl. +0.107 

for a total 2.203 deg 

ibex_rotate -o -u -0.514158,-0.783058,-0.349946 -w ibex-sun -t 2016-11-28T06:36:58.694Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.514158,-0.783058,-0.349946 

which is R.A. +236.711 Decl. -20.484 

missing R.A. +244.265 Decl. -21.361 (ibex-sun) 

error is R.A. +7.554 Decl. +0.877 

for a total 7.110 deg 

No Lo O-mode. 

There is no overlap with orbit 346 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: Tuesday, November 1, 2016 3:20:44 AM 
Subject: IBEX ORbit# 347 ATS Approval (14 Nov 16 - 23 Nov 16) 

Guys, 

Here are the planning products and ATS for Orbit# 347. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 4 Nov 16 @1200 UTC 

Note the following: 

1. Battery Balancing at Perigee 

# 2016-11-23T16:19:02.270Z,Perigee,orbit:347 

SetLongEclipseFlag TRUE $TIME=2016/11:23:16:00:00 

SetLongEclipseFlag FALSE $TIME=2016/11:23:17:30:00 

2. APL-18 SSR_Dump/Tracking Contact 

3. Moon in Lo FOV Commands 

2016-11-20T13:57:33.739Z,MoonInLoFovStart,orbit:347 

# 2016-11-21T17:43:00.355Z,MoonInLoFovStop,orbit:347 

4. OEF Generation 

The OEF was started in Orbit# 345 due to the PERIGEE sun maneuver in Orbit# 346 

5. Command Load Constraint Violation Report 

IBEX_2016_319_o0347a_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 2016/11/14 18:16:51 UTC 

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

transition to science mode at 2016/11/18 15:51:44 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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