[Isocops] IBEX Orbit# 350 ATS - v001 approval
Ken Fairchild
fair-play at comcast.net
Wed Nov 30 22:05:50 EST 2016
All,
I have looked at the orbit 350 ATS,
IBEX_2016_347_o0350a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2016_347_o0350a_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 v003 STF,
IBEX_2016_347_o0350a_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_2016_347_o0350a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts 18+ hours after 15 Re ascending and runs for almost two days. 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 3+ hours before that in the OEF and the ATS end time is about 4 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_Orbit350_Contacts.txt,
for all contacts (4).
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 349 left us pointing in safe directions for the orbit 350 arc A ascending and descending sequences:
ibex_rotate -o -u -0.150617,-0.902955,-0.402475 -w ibex-sun -t 2016/12:12:12:11:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.150617,-0.902955,-0.402475
which is R.A. +260.530 Decl. -23.733
missing R.A. +259.893 Decl. -23.127 (ibex-sun)
error is R.A. +0.637 Decl. +0.606
for a total 0.842 deg
ibex_rotate -o -u -0.150617,-0.902955,-0.402475 -w ibex-sun -t 2016/12:16:06:52:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.150617,-0.902955,-0.402475
which is R.A. +260.530 Decl. -23.733
missing R.A. +263.975 Decl. -23.356 (ibex-sun)
error is R.A. +3.445 Decl. +0.377
for a total 3.181 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 -0.068827,-0.911333,-0.405875 -w ibex-sun -t 2016/12:16:08:35:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.068827,-0.911333,-0.405875
which is R.A. +265.681 Decl. -23.946
missing R.A. +264.053 Decl. -23.358 (ibex-sun)
error is R.A. +1.628 Decl. +0.588
for a total 1.603 deg
ibex_rotate -o -u -0.068827,-0.911333,-0.405875 -w ibex-sun -t 2016/12:16:10:10:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.068827,-0.911333,-0.405875
which is R.A. +265.681 Decl. -23.946
missing R.A. +264.125 Decl. -23.360 (ibex-sun)
error is R.A. +1.556 Decl. +0.586
for a total 1.541 deg
ibex_rotate -o -u -0.068827,-0.911333,-0.405875 -w ibex-sun -t 2016/12:21:00:19:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.068827,-0.911333,-0.405875
which is R.A. +265.681 Decl. -23.946
missing R.A. +269.237 Decl. -23.415 (ibex-sun)
error is R.A. +3.556 Decl. +0.531
for a total 3.300 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 351 apogee:
ibex_rotate -o -u 0.017073,-0.913279,-0.406976 -w ibex-sun -t 2016/12:21:02:41:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.017073,-0.913279,-0.406976
which is R.A. +271.071 Decl. -24.015
missing R.A. +269.354 Decl. -23.417 (ibex-sun)
error is R.A. +1.717 Decl. +0.598
for a total 1.682 deg
ibex_rotate -o -u 0.017073,-0.913279,-0.406976 -w ibex-sun -t 2016-12-26T03:46:34.011Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.017073,-0.913279,-0.406976
which is R.A. +271.071 Decl. -24.015
missing R.A. +274.937 Decl. -23.388 (ibex-sun)
error is R.A. +3.866 Decl. +0.627
for a total 3.595 deg
No Lo O-mode.
There is no overlap with orbit 349 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: "Bobbett.James" <james.bobbett at orbitalatk.com>, "Bret Hautamaki" <bhautama at gmail.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>, "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>, "Eric Zirnstein" <ezirnstein at swri.edu>
Sent: Wednesday, November 30, 2016 1:39:50 PM
Subject: IBEX Orbit# 350 ATS
Sorry about that Guys
Sheral R. Wesley
IBEX Mission OPS
CRS/CYGNUS Mission Planning
Bldg. 2 Room 1337
Office (703) 406-5641
Cell (202) 236-0802
From: Wesley.Sheral
Sent: Monday, November 28, 2016 11:14 PM
To: 'David Heirtzler'; 'IBEX-FDG'; 'IBEXOPS'; 'ISOC'; 'Ken Fairchild'; 'Ken Fairchild'; Lockwood.Robert; 'Michelle Reno'; 'Nigel Angold'; 'Paul Janzen'; Perry.Tim; Tyler.Ryan; Wesley.Sheral
Subject:
Guys,
Here are the planning files and ATS for Orbit# 350.
Please respond to this email thread with your comments and approvals
Approvals are required by 1 Nov 16 @ 1800 UTC
Note the following:
1. Battery Balancing
Orbit# 350 PERIGEE: Battery Balancing Commands
# 2016-12-21T11:55:34.747Z,Perigee,orbit:350
SetLongEclipseFlag TRUE $TIME=2016/12:21:11:00:00
SetLongEclipseFlag FALSE $TIME=2016/12:21:12:30:00
2. Moon in LO FOV
2016-12-20T06:07:23.320Z,MoonInLoFovStart,orbit:350
2016-12-20T22:47:53.661Z,MoonInLoFovStop,orbit:350
3. Command Load Constraint Violation Report
IBEX_2016_347_o0350a_v001.scr
==========================
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 2016/12/12 10:33:45 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/12/16 09:40:21 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
IBEX Mission OPS
CRS/CYGNUS Mission Planning
Bldg. 2 Room 1337
Office (703) 406-5641
Cell (202) 236-0802
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, data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed, transferred, or copied, whether incorporated or in its original form, to foreign nationals, residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. Data subject to the Export Administration Act may not be disseminated, distributed, transferred or copied contrary to U. S. Department of Commerce regulations. 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.
*********************
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