[Isocops] IBEX Orbit# 348 ATS Approval ( 23 Nov - 3 Dec ) - v001 approval

Mon Nov 14 13:59:00 EST 2016

All, 

I have looked at the orbit 348 ATS, 

IBEX_2016_328_o0348a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_328_o0348a_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_328_o0348a_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_2016_319_o0348a_v001.oef, 

and as verified with ibex_orbit. 

There are no star tracker outages. 

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_Orbit348_Contacts.txt, 

for all contacts (3). 

No battery cell balancing this orbit; we'll do it again in the next orbit. 

The inertial maneuver at perigee of orbit 347 left us pointing in safe directions for the orbit 348 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.514158,-0.783058,-0.349946 -w ibex-sun -t 2016/11:24:03:49:46 

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. +240.005 Decl. -20.593 (ibex-sun) 

error is R.A. +3.294 Decl. +0.109 

for a total 3.087 deg 

ibex_rotate -o -u -0.514158,-0.783058,-0.349946 -w ibex-sun -t 2016/11:27:19:03:35 

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. +243.757 Decl. -21.282 (ibex-sun) 

error is R.A. +7.046 Decl. +0.798 

for a total 6.631 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 -0.441817,-0.818934,-0.366258 -w ibex-sun -t 2016/11:27:20:46:43 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.441817,-0.818934,-0.366258 

which is R.A. +241.653 Decl. -21.485 

missing R.A. +243.833 Decl. -21.294 (ibex-sun) 

error is R.A. +2.180 Decl. +0.191 

for a total 2.039 deg 

ibex_rotate -o -u -0.441817,-0.818934,-0.366258 -w ibex-sun -t 2016/11:27:22:21:49 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.441817,-0.818934,-0.366258 

which is R.A. +241.653 Decl. -21.485 

missing R.A. +243.902 Decl. -21.305 (ibex-sun) 

error is R.A. +2.249 Decl. +0.180 

for a total 2.102 deg 

ibex_rotate -o -u -0.441817,-0.818934,-0.366258 -w ibex-sun -t 2016/12:02:08:25:58 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.441817,-0.818934,-0.366258 

which is R.A. +241.653 Decl. -21.485 

missing R.A. +248.728 Decl. -21.978 (ibex-sun) 

error is R.A. +7.075 Decl. +0.493 

for a total 6.590 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 349 apogee: 

ibex_rotate -o -u -0.369238,-0.848785,-0.378455 -w ibex-sun -t 2016/12:02:10:44:32 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.369238,-0.848785,-0.378455 

which is R.A. +246.490 Decl. -22.238 

missing R.A. +248.840 Decl. -21.994 (ibex-sun) 

error is R.A. +2.350 Decl. +0.244 

for a total 2.191 deg 

ibex_rotate -o -u -0.369238,-0.848785,-0.378455 -w ibex-sun -t 2016-12-07T10:22:00.969Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.369238,-0.848785,-0.378455 

which is R.A. +246.490 Decl. -22.238 

missing R.A. +254.199 Decl. -22.672 (ibex-sun) 

error is R.A. +7.709 Decl. +0.434 

for a total 7.137 deg 

No Lo O-mode. 

There is no overlap with orbit 347 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: Thursday, November 10, 2016 3:46:11 PM 
Subject: IBEX Orbit# 348 ATS Approval ( 23 Nov - 3 Dec ) 

All, 

Here are the planning products and ATS for Orbit# 348. 

Please respond to this email thread with your comments and approvals 

Approvals are required before COB 12 Nov 16. 

Note the following: 

1. No Battery Balancing 

2. NO Moon in Lo FOV Commands 

3. IBEX_2016_328_o0348a_v001.ccvr 

Command Load Constraint Violation Report (CCVR) 

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

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 2016/11/24 02:09:27 UTC 

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

transition to science mode at 2016/11/27 21:51:49 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 

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Thank you. 
********************* 

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