[Isocops] IBEX Orbit# 305 ATS Approval (30 Oct 15 - 9 Nov 15) - v001 approval

Tue Oct 20 07:02:37 EDT 2015

All, 

I have looked at the orbit 305 ATS, 

IBEX_2015_303_o0305a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2015_303_o0305a_v001.ccvr. 

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

IBEX_2015_303_o0305a_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_303_o0305a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts an hour before 15 Re ascending and runs for about 14 hours. Some despinning may be required due to this outage. 

There is one Moon in Lo FOV session that starts in arc A and ends in arc B. The ATS start time is about 11 hours after that in the OEF and the ATS end time is about 4 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_Orbit305_Contacts.txt, 

for all contacts (4). 

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

The inertial maneuver at perigee of orbit 304 left us pointing in safe directions for the orbit 305 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.825986,-0.513211,-0.233157 -w ibex-sun -t 2015/10:31:05:49:47 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.825986,-0.513211,-0.233157 

which is R.A. +211.854 Decl. -13.483 

missing R.A. +214.932 Decl. -13.949 (ibex-sun) 

error is R.A. +3.078 Decl. +0.466 

for a total 3.027 deg 

ibex_rotate -o -u -0.825986,-0.513211,-0.233157 -w ibex-sun -t 2015/11:03:21:49:24 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.825986,-0.513211,-0.233157 

which is R.A. +211.854 Decl. -13.483 

missing R.A. +218.395 Decl. -15.107 (ibex-sun) 

error is R.A. +6.541 Decl. +1.624 

for a total 6.543 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 -0.777593,-0.572747,-0.259443 -w ibex-sun -t 2015/11:03:23:34:43 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.777593,-0.572747,-0.259443 

which is R.A. +216.374 Decl. -15.037 

missing R.A. +218.467 Decl. -15.129 (ibex-sun) 

error is R.A. +2.093 Decl. +0.092 

for a total 2.023 deg 

ibex_rotate -o -u -0.777593,-0.572747,-0.259443 -w ibex-sun -t 2015/11:04:01:07:38 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.777593,-0.572747,-0.259443 

which is R.A. +216.374 Decl. -15.037 

missing R.A. +218.530 Decl. -15.148 (ibex-sun) 

error is R.A. +2.156 Decl. +0.111 

for a total 2.085 deg 

ibex_rotate -o -u -0.777593,-0.572747,-0.259443 -w ibex-sun -t 2015/11:08:13:06:39 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.777593,-0.572747,-0.259443 

which is R.A. +216.374 Decl. -15.037 

missing R.A. +223.124 Decl. -16.491 (ibex-sun) 

error is R.A. +6.750 Decl. +1.454 

for a total 6.657 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 306 apogee: 

ibex_rotate -o -u -0.724582,-0.628384,-0.283045 -w ibex-sun -t 2015/11:08:15:34:57 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.724582,-0.628384,-0.283045 

which is R.A. +220.933 Decl. -16.442 

missing R.A. +223.235 Decl. -16.524 (ibex-sun) 

error is R.A. +2.302 Decl. +0.082 

for a total 2.209 deg 

ibex_rotate -o -u -0.724582,-0.628384,-0.283045 -w ibex-sun -t 2015-11-13T14:06:39.520Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.724582,-0.628384,-0.283045 

which is R.A. +220.933 Decl. -16.442 

missing R.A. +228.103 Decl. -17.917 (ibex-sun) 

error is R.A. +7.170 Decl. +1.475 

for a total 7.007 deg 

No Lo O-mode. 

There is no overlap with orbit 304 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: Saturday, October 17, 2015 1:54:46 AM 
Subject: IBEX Orbit# 305 ATS Approval (30 Oct 15 - 9 Nov 15) 

Guys, 

Here are the planning files and ATS for Orbit# 305. 

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

Approvals are required before 20 Oct 15 @1100 UTC. 

Note the following: 

1. Moon in Lo FOV Commands 

Orbit# 305 APOGEE: Moon in Lo FOV Commands 

# 2015-11-02T22:40:11.366Z,MoonInLoFovStart,orbit:305 

# 2015-11-04T15:24:03.219Z,MoonInLoFovStop,orbit:305 

2. No Battery Balancing this PERIGEE 

3. Command Load Constraint Violation Report 

IBEX_2015_303_o0305a_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 

Work (703) 406-5641 

Cell (304) 279-6678 

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