[Isocops] IBEX Orbit# 309 ATS Approval (6 Dec 15 - 15 Dec 15) - v001 approval

Wed Nov 25 23:46:52 EST 2015

All, 

I have looked at the orbit 309 ATS, 

IBEX_2015_340_o0309a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2015_340_o0309a_v001.ccvr. 

The PL commands in the v001 ATS match those in the v002 STF, 

IBEX_2015_340_o0309a_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_2015_340_o0309a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts about 17 hours after we ascend in arc A and runs for 14+ hours. Some despinning may be required due to this outage. 

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_Orbit309_Contacts.txt, 

for the 3 contacts in the ATS. The APL contact commands will be in a separate ATS. 

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 308 left us pointing in safe directions for the orbit 309 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.324591,-0.86388,-0.385165 -w ibex-sun -t 2015/12:06:18:23:43 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.324591,-0.863880,-0.385165 

which is R.A. +249.407 Decl. -22.654 

missing R.A. +252.770 Decl. -22.502 (ibex-sun) 

error is R.A. +3.363 Decl. +0.152 

for a total 3.109 deg 

ibex_rotate -o -u -0.324591,-0.86388,-0.385165 -w ibex-sun -t 2015/12:10:07:54:17 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.324591,-0.863880,-0.385165 

which is R.A. +249.407 Decl. -22.654 

missing R.A. +256.562 Decl. -22.898 (ibex-sun) 

error is R.A. +7.155 Decl. +0.244 

for a total 6.601 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 -0.216086,-0.891696,-0.397724 -w ibex-sun -t 2015/12:10:09:37:25 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.216086,-0.891696,-0.397724 

which is R.A. +256.378 Decl. -23.436 

missing R.A. +256.639 Decl. -22.905 (ibex-sun) 

error is R.A. +0.261 Decl. +0.531 

for a total 0.583 deg 

ibex_rotate -o -u -0.216086,-0.891696,-0.397724 -w ibex-sun -t 2015/12:10:11:12:31 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.216086,-0.891696,-0.397724 

which is R.A. +256.378 Decl. -23.436 

missing R.A. +256.710 Decl. -22.910 (ibex-sun) 

error is R.A. +0.332 Decl. +0.526 

for a total 0.608 deg 

ibex_rotate -o -u -0.216086,-0.891696,-0.397724 -w ibex-sun -t 2015/12:14:19:00:00 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.216086,-0.891696,-0.397724 

which is R.A. +256.378 Decl. -23.436 

missing R.A. +261.524 Decl. -23.195 (ibex-sun) 

error is R.A. +5.146 Decl. +0.241 

for a total 4.732 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 310 apogee: 

ibex_rotate -o -u -0.106359,-0.90826,-0.404663 -w ibex-sun -t 2015/12:14:21:10:41 

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. +261.632 Decl. -23.200 (ibex-sun) 

error is R.A. +1.689 Decl. +0.670 

for a total 1.687 deg 

ibex_rotate -o -u -0.106359,-0.90826,-0.404663 -w ibex-sun -t 2015-12-19T18:19:59.562Z 

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. +266.992 Decl. -23.442 (ibex-sun) 

error is R.A. +3.671 Decl. +0.428 

for a total 3.390 deg 

No Lo O-mode. 

There is no overlap with orbit 308 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: Monday, November 23, 2015 3:02:09 PM 
Subject: IBEX Orbit# 309 ATS Approval (6 Dec 15 - 15 Dec 15) 

Guys, 

Here are the planning products and ATS for Orbit# 309. 

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

Approvals are required before 26 Nov 15 @0900 UTC 

Note the following: 

1. Battery Balancing Commands 

Orbit# 309 PERIGEE: Battery Balancing 

# 2015-12-15T06:57:36.750Z,Perigee,orbit:309 

@ECT_SetLongEclipseFlag TRUE $TIME=2015/12:15:06:00:00 

@ECT_SetLongEclipseFlag FALSE $TIME=2015/12:15:07:30:00 

2. IBEX_Lo Sweep Table Contact 

IBEX,AUWA01,ADD,12/14/15,348,16:00:00,12/14/15,348,17:00:00,,LAHO 160K IBEX-2 Orbit# 309 IBEX_Lo Sweep Table Change Contact (17 Desc) 

3. APL-18 Contact *waiting to be confirmed 

IBEX,APL-18,ADD,12/15/15,349,00:30:00,12/15/15,349,01:30:00,,12re-Descending Perigee 2K-320K IBEX Orbit# 309 SSR_Dump/Tracking Contact (12 Desc) 

4. Command Load Constraint Violation Report 

IBEX_2015_340_o0309a_v001.scr 

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

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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