[Isocops] IBEX Orbit# 308 ATS (27 Nov 15 - 6 Dec 15) - v001 approval

Mon Nov 16 04:46:16 EST 2015

All, 

I have looked at the orbit 308 ATS, 

IBEX_2015_331_o0308a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2015_331_o0308a_v001.ccvr. 

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

IBEX_2015_331_o0308a_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_331_o0308a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts before orbit 307 perigee and ends 1+ days after we ascend in arc A. 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_Orbit308_Contacts.txt, 

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

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

The sun precession maneuver at perigee of orbit 307 left us pointing in safe directions for the orbit 308 arc A ascending and descending sequences: 

ibex_rotate -o -r +241.888 -d -20.911 -w ibex-sun -t 2015/11:27:14:13:54 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.440162,-0.823934,-0.356917 

which is R.A. +241.888 Decl. -20.911 

missing R.A. +242.864 Decl. -21.106 (ibex-sun) 

error is R.A. +0.976 Decl. +0.195 

for a total 0.931 deg 

ibex_rotate -o -r +241.888 -d -20.911 -w ibex-sun -t 2015/12:01:05:10:02 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.440162,-0.823934,-0.356917 

which is R.A. +241.888 Decl. -20.911 

missing R.A. +246.625 Decl. -21.736 (ibex-sun) 

error is R.A. +4.737 Decl. +0.825 

for a total 4.489 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 -0.399005,-0.83717,-0.374089 -w ibex-sun -t 2015/12:01:06:53:10 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.399005,-0.837170,-0.374089 

which is R.A. +244.517 Decl. -21.968 

missing R.A. +246.701 Decl. -21.747 (ibex-sun) 

error is R.A. +2.184 Decl. +0.221 

for a total 2.039 deg 

ibex_rotate -o -u -0.399005,-0.83717,-0.374089 -w ibex-sun -t 2015/12:01:08:28:16 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.399005,-0.837170,-0.374089 

which is R.A. +244.517 Decl. -21.968 

missing R.A. +246.771 Decl. -21.757 (ibex-sun) 

error is R.A. +2.254 Decl. +0.211 

for a total 2.102 deg 

ibex_rotate -o -u -0.399005,-0.83717,-0.374089 -w ibex-sun -t 2015/12:05:18:52:10 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.399005,-0.837170,-0.374089 

which is R.A. +244.517 Decl. -21.968 

missing R.A. +251.646 Decl. -22.351 (ibex-sun) 

error is R.A. +7.129 Decl. +0.383 

for a total 6.613 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 309 apogee: 

ibex_rotate -o -u -0.324591,-0.86388,-0.385165 -w ibex-sun -t 2015/12:05:21:09:12 

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. +251.758 Decl. -22.364 (ibex-sun) 

error is R.A. +2.351 Decl. +0.290 

for a total 2.191 deg 

ibex_rotate -o -u -0.324591,-0.86388,-0.385165 -w ibex-sun -t 2015-12-10T19:27:25.164Z 

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. +257.081 Decl. -22.939 (ibex-sun) 

error is R.A. +7.674 Decl. +0.285 

for a total 7.080 deg 

No Lo O-mode. 

There is no overlap with orbit 307 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: "Bret Hautamaki" <bhautama at gmail.com>, "Bobbett.James" <james.bobbett at orbitalatk.com>, "Cavallo.John" <john.cavallo at orbitalatk.com>, "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>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Regiec.Thomas" <thomas.regiec at orbitalatk.com>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com> 
Sent: Saturday, November 14, 2015 3:01:59 PM 
Subject: IBEX Orbit# 308 ATS (27 Nov 15 - 6 Dec 15) 

Guys, 

Here are the planning products and ATS for Orbit# 308. 

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

Approvals are required before 16 Nov 15 @2200 UTC 

Note the following: 

1. The OEF is generated using the Orbit# 306 OEF 

Orbit# 307 has a Apogee and Perigee sun maneuver 

2. No battery balancing commands with orbit 

3. Orbit # 308 SSR_Dump Conact 

The APL-18 SSR_Dump Contact commands will be loaded separately once APL has scheduled the contact. 

4. Command Load Constraint Violation Report 

IBEX_2015_331_o0308a_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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