[Isocops] IBEX Orbit# 274 ATS Approval (21- 31 Jan 15) TWO ATS FILES - v001 full orbit ATS approval

Sat Jan 10 15:25:00 EST 2015

All, 

Note: Angle at descending after the apogee sun precession maneuver: 4.129 deg. 

I have looked at the orbit 274 ATS, 

IBEX_2015_021_o0274a_v001.scr, 

and I approve. 

There are no constraint violations in 

IBEX_2015_021_o0274a_v001.ccvr. 

The PL commands in the v001 ATS match those in the v003 STF, 

IBEX_2015_021_o0274a_v003.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_021_o0274a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. It starts almost 2 days after 15 Re ascending and ends 1 1/2+ days after apogee. Some despinning may be required due to this outage. 

There is one moon in Lo FOV session in arc A. The ATS start time is about 3 hours after that in the OEF and the ATS end time is 10 minutes 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_Orbit_274_Contacts.txt, 

for all contacts (3). 

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 273 left us pointing in safe directions for the orbit 274 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.533053,-0.80511,-0.2601 -w ibex-sun -t 2015/01:22:01:12:21 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.533053,-0.805110,-0.260100 

which is R.A. +303.508 Decl. -15.076 

missing R.A. +303.749 Decl. -19.830 (ibex-sun) 

error is R.A. +0.241 Decl. +4.754 

for a total 4.759 deg 

ibex_rotate -o -u 0.533053,-0.80511,-0.2601 -w ibex-sun -t 2015/01:26:02:11:34 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.533053,-0.805110,-0.260100 

which is R.A. +303.508 Decl. -15.076 

missing R.A. +307.945 Decl. -18.909 (ibex-sun) 

error is R.A. +4.437 Decl. +3.833 

for a total 5.717 deg 

The sun 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 -r +308.021 -d -18.890 -w ibex-sun -t 2015/01:26:03:59:42 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.582776,-0.745356,-0.323752 

which is R.A. +308.021 Decl. -18.890 

missing R.A. +308.021 Decl. -18.890 (ibex-sun) 

error is R.A. +0.000 Decl. +0.000 

for a total 0.000 deg 

ibex_rotate -o -r +308.021 -d -18.890 -w ibex-sun -t 2015/01:26:05:29:48 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.582776,-0.745356,-0.323752 

which is R.A. +308.021 Decl. -18.890 

missing R.A. +308.085 Decl. -18.875 (ibex-sun) 

error is R.A. +0.064 Decl. +0.015 

for a total 0.062 deg 

ibex_rotate -o -r +308.021 -d -18.890 -w ibex-sun -t 2015/01:30:06:10:09 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.582776,-0.745356,-0.323752 

which is R.A. +308.021 Decl. -18.890 

missing R.A. +312.214 Decl. -17.790 (ibex-sun) 

error is R.A. +4.193 Decl. +1.100 

for a total 4.129 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 275 apogee: 

ibex_rotate -o -u 0.662769,-0.7154,-0.221225 -w ibex-sun -t 2015/01:30:08:18:24 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.662769,-0.715400,-0.221225 

which is R.A. +312.813 Decl. -12.781 

missing R.A. +312.310 Decl. -17.764 (ibex-sun) 

error is R.A. +0.503 Decl. +4.983 

for a total 5.007 deg 

ibex_rotate -o -u 0.662769,-0.7154,-0.221225 -w ibex-sun -t 2015-02-04T10:12:06.136Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.662769,-0.715400,-0.221225 

which is R.A. +312.813 Decl. -12.781 

missing R.A. +317.537 Decl. -16.348 (ibex-sun) 

error is R.A. +4.724 Decl. +3.567 

for a total 5.798 deg 

Lo O-mode in arc A (plan 6,7,1,1). There is more than 1 hour between the end of the ascending sequence and the start of O-mode and more than 3 hours after O-mode ends and the start of the outage. 

There is no overlap with orbit 273 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: "Tim Perry" <Perry.Tim at orbital.com> 
To: "Harold Kucharek" <Harald.Kucharek at unh.edu>, "IBEX FDG" <ibex at applieddefense.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Marty Quinn" <marty.quinn at unh.edu>, "Michelle Reno" <mreno at swri.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Paul Janzen" <paul.janzen at umontana.edu>, "Robert Lockwood" <Lockwood.Robert at Orbital.com>, "Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley" <wesley.sheral at orbital.com>, "Tim Perry" <perry.tim at orbital.com>, "Ibex Mission Operations" <ibexops at gmail.com> 
Sent: Thursday, January 8, 2015 12:12:03 PM 
Subject: IBEX Orbit# 274 ATS Approval (21- 31 Jan 15) TWO ATS FILES 

All, 
Attached are the 2 ATS files for Orbit #274: 
IBEX_2015_021_o0274a_v001 
IBEX_2015_021_o0274a_HGC_V001 

Please respond to this email thread with questions and your approvals. 
Approvals are required before 11Jan15 @ 0000 UTC 

Note the following: 
1. Battery Balancing commands at PERIGEE this orbit 

2. Moon in Lo FOV 
2015-01-23T16:38:36.144Z,MoonInLoFovStart,orbit:274 
2015-01-24T10:42:05.058Z,MoonInLoFovStop,orbit:274 

3. LO O-Mode 
Begin:2015/01:22:03:04:00 
End:2015/01:22:03:04:00 

4. Command Constraint Violation Report (2ea) 

# IBEX_2015_021_o0274a_v001.scr 

========================== 
HARD CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 

========================== 
SOFT CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 

============== 
OTHER MESSAGES 
============== 
NO MESSAGES. 

# IBEX_2015_021_o0274a_HGC_V001.scr 

========================== 
HARD CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 

========================== 
SOFT CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 

============== 
OTHER MESSAGES 
============== 
NO MESSAGES. 

(See attached file: IBEX_2015_021_o0274a_HGC_V001.ccvr)(See attached file: 
IBEX_2015_021_o0274a_HGC_V001.txt)(See attached file: 
IBEX_2015_021_o0274a_v001.ccvr)(See attached file: 
IBEX_2015_021_o0274a_v001.oef)(See attached file: 
IBEX_2015_021_o0274a_v001.txt)(See attached file: 
IBEX_Orbit_274_Contacts.txt) 

Timothy E. Perry 
CYGNUS Mission Planning 
IBEX Mission Ops Lead 
perry.tim at orbital.com 
Office: (703) 406-5976 
Cell:(301) 606-1430 

Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged and exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This communication may also contain data subject to U.S. export laws. If so, that data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed or copied to foreign nationals, residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. If you have received this communication in error, please notify the sender by reply e-mail and destroy the e-mail message and any physical copies made of the communication. Thank you. 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20150110/98b98cdd/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev14-o0274_KWF.doc
Type: application/msword
Size: 118272 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20150110/98b98cdd/IBEX-Command-Approval-Checklist-Rev14-o0274_KWF-0001.doc 