[Isocops] IBEX ATS Orbit #310 Approval 15 - 24 Dec - v002 approval

Sat Dec 5 01:00:11 EST 2015

All, 

I have looked at the orbit 310 ATS, 

IBEX_2015_349_o0310a_v002.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2015_349_o0310a_v001.ccvr. 

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

IBEX_2015_349_o0310a_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_2015_349_o0310a_v001.oef, 

and as verified with ibex_orbit. 

There are two star tracker outages. The first starts about 27 hours after 15 Re ascending and runs for about 20 hours. The second starts abut 30 hours after apogee and runs for 3+ days. Some despinning may be required due to these outages. 

There is one moon in LO FOV session in arc A. The ATS start time is about 1 1/2 hours after that in the OEF and the ATS end time is about an hour 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_Orbit310_Contacts_v002.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 309 left us pointing in safe directions for the orbit 310 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.106359,-0.90826,-0.404663 -w ibex-sun -t 2015/12:15:18:52:19 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.106359,-0.908260,-0.404663 

which is R.A. +263.321 Decl. -23.870 

missing R.A. +262.691 Decl. -23.279 (ibex-sun) 

error is R.A. +0.630 Decl. +0.591 

for a total 0.827 deg 

ibex_rotate -o -u -0.106359,-0.90826,-0.404663 -w ibex-sun -t 2015/12:19:06:47:49 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.106359,-0.908260,-0.404663 

which is R.A. +263.321 Decl. -23.870 

missing R.A. +266.469 Decl. -23.434 (ibex-sun) 

error is R.A. +3.148 Decl. +0.436 

for a total 2.917 deg 

The inertial 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 0.006729,-0.913627,-0.406497 -w ibex-sun -t 2015/12:19:08:30:57 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.006729,-0.913627,-0.406497 

which is R.A. +270.422 Decl. -23.985 

missing R.A. +266.547 Decl. -23.435 (ibex-sun) 

error is R.A. +3.875 Decl. +0.550 

for a total 3.590 deg 

ibex_rotate -o -u 0.006729,-0.913627,-0.406497 -w ibex-sun -t 2015/12:19:10:06:03 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.006729,-0.913627,-0.406497 

which is R.A. +270.422 Decl. -23.985 

missing R.A. +266.619 Decl. -23.436 (ibex-sun) 

error is R.A. +3.803 Decl. +0.549 

for a total 3.525 deg 

ibex_rotate -o -u 0.006729,-0.913627,-0.406497 -w ibex-sun -t 2015/12:23:17:10:18 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.006729,-0.913627,-0.406497 

which is R.A. +270.422 Decl. -23.985 

missing R.A. +271.409 Decl. -23.418 (ibex-sun) 

error is R.A. +0.987 Decl. +0.567 

for a total 1.067 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 311 apogee: 

ibex_rotate -o -u 0.052071,-0.912217,-0.406386 -w ibex-sun -t 2015/12:24:03:28:14 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.052071,-0.912217,-0.406386 

which is R.A. +273.267 Decl. -23.978 

missing R.A. +271.926 Decl. -23.416 (ibex-sun) 

error is R.A. +1.341 Decl. +0.562 

for a total 1.350 deg 

ibex_rotate -o -u 0.052071,-0.912217,-0.406386 -w ibex-sun -t 2015-12-28T18:28:01.339Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.052071,-0.912217,-0.406386 

which is R.A. +273.267 Decl. -23.978 

missing R.A. +276.999 Decl. -23.314 (ibex-sun) 

error is R.A. +3.732 Decl. +0.664 

for a total 3.482 deg 

No Lo O-mode. 

There is no overlap with orbit 309 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>, "Marty Quinn" <marty.quinn at unh.edu>, "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: Wednesday, December 2, 2015 2:54:22 PM 
Subject: IBEX ATS Orbit #310 Approval 15 - 24 Dec 

Guys, 

Here are the planning products and ATS for Orbit# 310. 

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

Approvals are required before 5 Dec 15 @1700 UTC 

Note the following: 

1. Battery Balancing Commands 

Orbit# 310 PERIGEE: Battery Balancing 

# Orbit# 310 PERIGEE: Battery Balancing 

# 2015-12-24T05:09:21.054Z,Perigee,orbit:310 

@ECT_SetLongEclipseFlag TRUE $TIME=2015/12:24:05:00:00 

@ECT_SetLongEclipseFlag FALSE $TIME=2015/12:24:06:30:00 

2. APL-18 Contact *waiting to be confirmed 

IBEX,APL-18,ADD,12/23/15,357,23:30:00,12/23/15,358,00:30:00,,11re-Descending Perigee 2K-320K IBEX Orbit# 310 SSR_Dump/Tracking Contact (11 Desc) 

3. Command Load Constraint Violation Report 

IBEX_2015_349_o0310a_v001.ccvr 

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

HARD CONSTRAINT VIOLATIONS 

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

NO VIOLATIONS. 

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

SOFT CONSTRAINT VIOLATIONS 

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

NO VIOLATIONS. 

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

OTHER MESSAGES 

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

NO MESSAGES. 

Sheral R. Wesley 

SPVR., Satellite Operations 

IBEX Mission OPS 

CRS/CYGNUS Mission Planning 

Bldg. 2 Room 1337 

Office (703) 406-5641 

Cell (202) 236-0802 

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