[Isocops] IBEX Orbit# 306 ATS Approval - v001 approval
Ken Fairchild
fair-play at comcast.net
Thu Oct 29 00:34:39 EDT 2015
All,
I have looked at the orbit 306 ATS,
IBEX_2015_313_o0306a_v001.scr,
and I approve.
The only constraint violation in
IBEX_2015_333_o0306a_v001.ccvr
is related to the eclipse and is expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2015_313_o0306a_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_313_o0306a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts about 10 1/2 hours after orbit 305 perigee and ends about 14 hours later. Some despinning may be required due to this outage.
There are no moon in Lo FOV sessions.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit306_Contacts.txt,
for all contacts (2).
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 305 left us pointing in safe directions for the orbit 306 arc A ascending and descending sequences:
ibex_rotate -o -u -0.724582,-0.628384,-0.283045 -w ibex-sun -t 2015/11:09:11:51:16
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. +224.091 Decl. -16.793 (ibex-sun)
error is R.A. +3.158 Decl. +0.351
for a total 3.046 deg
ibex_rotate -o -u -0.724582,-0.628384,-0.283045 -w ibex-sun -t 2015/11:13:02:33:32
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. +227.617 Decl. -17.792 (ibex-sun)
error is R.A. +6.684 Decl. +1.350
for a total 6.529 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 -0.666615,-0.679775,-0.305828 -w ibex-sun -t 2015/11:13:04:16:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.666615,-0.679775,-0.305828
which is R.A. +225.560 Decl. -17.808
missing R.A. +227.689 Decl. -17.811 (ibex-sun)
error is R.A. +2.129 Decl. +0.003
for a total 2.027 deg
ibex_rotate -o -u -0.666615,-0.679775,-0.305828 -w ibex-sun -t 2015/11:13:05:51:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.666615,-0.679775,-0.305828
which is R.A. +225.560 Decl. -17.808
missing R.A. +227.756 Decl. -17.828 (ibex-sun)
error is R.A. +2.196 Decl. +0.020
for a total 2.090 deg
ibex_rotate -o -u -0.666615,-0.679775,-0.305828 -w ibex-sun -t 2015/11:17:14:46:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.666615,-0.679775,-0.305828
which is R.A. +225.560 Decl. -17.808
missing R.A. +232.348 Decl. -18.929 (ibex-sun)
error is R.A. +6.788 Decl. +1.121
for a total 6.538 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 307 apogee.
ibex_rotate -o -u -0.606076,-0.725836,-0.325321 -w ibex-sun -t 2015/11:17:17:11:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606076,-0.725836,-0.325321
which is R.A. +230.138 Decl. -18.985
missing R.A. +232.460 Decl. -18.955 (ibex-sun)
error is R.A. +2.322 Decl. +0.030
for a total 2.196 deg
ibex_rotate -o -u -0.606076,-0.725836,-0.325321 -w ibex-sun -t 2015-11-22T14:44:49.829Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606076,-0.725836,-0.325321
which is R.A. +230.138 Decl. -18.985
missing R.A. +237.457 Decl. -20.108 (ibex-sun)
error is R.A. +7.319 Decl. +1.123
for a total 6.987 deg
No Lo O-mode.
There is no overlap with orbit 305 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: Wednesday, October 28, 2015 9:52:41 AM
Subject: IBEX Orbit# 306 ATS Approval
Sheral R. Wesley
SPVR., Satellite Operations
IBEX Mission OPS
CYGNUS Mission Planning
Work (703) 406-5641
Cell (304) 279-6678
From: Wesley.Sheral
Sent: Tuesday, October 27, 2015 3:22 AM
To: Bret Hautamaki; David Heirtzler; IBEX-FDG; IBEXOPS; ISOC; Ken Fairchild; Lockwood.Robert; Marty Quinn; Michelle Reno; Nigel Angold; Paul Janzen; Perry.Tim; Tyler.Ryan; Wesley.Sheral
Subject:
Guys,
Here are the planning products for the Orbit# 306 ATS. Please respond to this email thread with comments, questions and your approvals.
Approvals are required before 29 Oct 15 @1800 UTC
Note the following;
1. Short Eclipse
# Orbit# 306 APOGEE: Short Eclipse (No Action Required)
# 2015-11-15T08:21:29.314Z,PenumbraEntry,orbit:306
# 2015-11-15T08:21:29.314Z,EclipseEntry,moderate:false,long:false,orbit:306
# 2015-11-15T09:27:31.819Z,PenumbraExit,orbit:306
# 2015-11-15T09:27:31.819Z,EclipseExit,moderate:false,long:false,orbit:306
2. Battery Balancing
# Orbit# 306 PERIGEE: Battery Balancing Commands
# 2015-11-18T02:29:21.005Z,Perigee,orbit:306
SetLongEclipseFlag TRUE $TIME=2015/11:18:02:00:00
SetLongEclipseFlag FALSE $TIME=2015/11:18:03:30:00
3. Command Load Constraint Violation Report
IBEX_2015_313_o0306a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-015: Battery charge falls below minimum from 2015/11/15 09:11:29 UTC -
2015/11/15 10:17:31 UTC. Lowest charge level is 6896.660000
watt-minutes during this interval.
* Orbit# 306 APOGEE: Short Eclipse (No Action Required)
# 2015-11-15T08:21:29.314Z,PenumbraEntry,orbit:306
# 2015-11-15T08:21:29.314Z,EclipseEntry,moderate:false,long:false,orbit:306
# 2015-11-15T09:27:31.819Z,PenumbraExit,orbit:306
# 2015-11-15T09:27:31.819Z,EclipseExit,moderate:false,long:false,orbit:306
==============
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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