[Isocops] IBEX Orbit# 276 ATS (9 Feb 15 - 18 Feb 15) - v001 approval
Ken Fairchild
fair-play at comcast.net
Mon Jan 26 21:50:33 EST 2015
All,
Note: Angle at descending after the apogee sun precession maneuver: 4.058 deg
I have looked at the orbit 276 ATS,
IBEX_2015_040_o0276a_v001.scr,
and I approve.
There are no constraint violations in
IBEX_2015_040_o0276a_v001.ccvr.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2015_040_o0276a_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_040_o0276a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts 1+ days before apogee and ends 3- days after apogee. 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 2 hours before that in the OEF and the ATS end time is 5 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_Orbit276Contacts.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 275 left us pointing in safe directions for the orbit 276 arc A ascending and descending sequences:
ibex_rotate -o -u 0.776423,-0.605801,-0.1737 -w ibex-sun -t 2015/02:09:14:29:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.776423,-0.605801,-0.173700
which is R.A. +322.037 Decl. -10.003
missing R.A. +322.744 Decl. -14.714 (ibex-sun)
error is R.A. +0.707 Decl. +4.711
for a total 4.761 deg
ibex_rotate -o -u 0.776423,-0.605801,-0.1737 -w ibex-sun -t 2015/02:13:15:11:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.776423,-0.605801,-0.173700
which is R.A. +322.037 Decl. -10.003
missing R.A. +326.716 Decl. -13.417 (ibex-sun)
error is R.A. +4.679 Decl. +3.414
for a total 5.713 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 +326.788 -d -13.392 -w ibex-sun -t 2015/02:13:16:59:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.813900,-0.532844,-0.231612
which is R.A. +326.788 Decl. -13.392
missing R.A. +326.788 Decl. -13.392 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +326.788 -d -13.392 -w ibex-sun -t 2015/02:13:18:29:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.813900,-0.532844,-0.231612
which is R.A. +326.788 Decl. -13.392
missing R.A. +326.848 Decl. -13.371 (ibex-sun)
error is R.A. +0.060 Decl. +0.021
for a total 0.062 deg
ibex_rotate -o -r +326.788 -d -13.392 -w ibex-sun -t 2015/02:17:18:50:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.813900,-0.532844,-0.231612
which is R.A. +326.788 Decl. -13.392
missing R.A. +330.685 Decl. -11.972 (ibex-sun)
error is R.A. +3.897 Decl. +1.420
for a total 4.058 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 277 apogee:
ibex_rotate -o -u 0.866924,-0.483595,-0.120743 -w ibex-sun -t 2015/02:17:20:59:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.866924,-0.483595,-0.120743
which is R.A. +330.846 Decl. -6.935
missing R.A. +330.774 Decl. -11.939 (ibex-sun)
error is R.A. +0.072 Decl. +5.004
for a total 5.004 deg
ibex_rotate -o -u 0.866924,-0.483595,-0.120743 -w ibex-sun -t 2015-02-22T19:45:23.537Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.866924,-0.483595,-0.120743
which is R.A. +330.846 Decl. -6.935
missing R.A. +335.617 Decl. -10.182 (ibex-sun)
error is R.A. +4.771 Decl. +3.247
for a total 5.726 deg
No Lo O-mode.
There is no overlap with orbit 275 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: "Ibex Mission Operations" <ibexops at gmail.com>
To: "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS/ORB" <IBEXops at orbital.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "John Cavallo" <cavallo.john at orbital.com>, "Ken Fairchild" <fair-play at comcast.net>, "Marty Quinn" <marty.quinn at unh.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Robert Lockwood" <Lockwood.Robert at Orbital.com>, "Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley" <wesley.sheral at orbital.com>, "Thomas Regiec" <regiec.thomas at orbital.com>, "Tim Perry" <perry.tim at orbital.com>
Sent: Sunday, January 25, 2015 10:13:26 PM
Subject: IBEX Orbit# 276 ATS (9 Feb 15 - 18 Feb 15)
Guys,
Here are the planning files and ATS for Orbit# 276. Please respond to this email thread with your comments and approvals.
Approvals and comments are required before 29 Jan 15 @ 1200 UTC
Please note the following
1. APOGEE Sun Maneuver
2. Orbit# 276 APOGEE: Moon in Lo FOV Commands
2015-02-15T04:02:09.621Z,MoonInLoFovStart,orbit:276
2015-02-15T23:02:26.268Z,MoonInLoFovStop,orbit:276
3. APL-18 SSR_Dump/Tracking Contact
IBEX,APL-18,ADD,02/17/15,048,21:30:00,02/17/14,048,22:30:00,,13_re Descending 2K-320K IBEX Orbit# 276 SSR_Dump/Tracking Contact (13 Desc)
4. Command Load Constraint Violation Report
IBEX_2015_040_o0276a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
==============
OTHER MESSAGES
==============
NO MESSAGES.
--
Sheral R. Wesley
SPVR., Satellite Operations
IBEX Mission OPS
CYGNUS Mission Planning
(304) 279-6678
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20150127/06e6dd86/attachment-0001.html
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev14-o0276_KWF.doc
Type: application/msword
Size: 118784 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20150127/06e6dd86/IBEX-Command-Approval-Checklist-Rev14-o0276_KWF-0001.doc
More information about the Isocops
mailing list