[Isocops] IBEX Orbit#334 ATS Approval ( 21 - 30 july ) - v001 approval
Ken Fairchild
fair-play at comcast.net
Sat Jul 9 13:25:32 EDT 2016
All,
I have looked at the orbit 334 ATS,
IBEX_2016_203_o0334a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2016_193_o0334a_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 v002 STF,
IBEX_2016_203_o0334a_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_2016_203_o0334a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 1 1/2 hours before perigee and ends about 4 hours after perigee. No despinning should be required due to this outage.
There is one moon in Lo FOV session in arc A. The ATS start time is about 6 hours after that in the OEF and the ATS end time is about 3 hours after 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_Orbit334_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 333 left us pointing in safe directions for the orbit 334 arc A ascending and descending sequences:
ibex_rotate -o -u -0.442281,0.826686,0.347819 -w ibex-sun -t 2016/07:21:13:16:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.442281,+0.826686,+0.347819
which is R.A. +118.147 Decl. +20.354
missing R.A. +121.069 Decl. +20.355 (ibex-sun)
error is R.A. +2.922 Decl. +0.001
for a total 2.739 deg
ibex_rotate -o -u -0.442281,0.826686,0.347819 -w ibex-sun -t 2016/07:25:01:11:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.442281,+0.826686,+0.347819
which is R.A. +118.147 Decl. +20.354
missing R.A. +124.552 Decl. +19.615 (ibex-sun)
error is R.A. +6.405 Decl. +0.739
for a total 6.064 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 -0.506557,0.795105,0.333478 -w ibex-sun -t 2016/07:25:02:54:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.506557,+0.795105,+0.333478
which is R.A. +122.501 Decl. +19.480
missing R.A. +124.624 Decl. +19.599 (ibex-sun)
error is R.A. +2.123 Decl. +0.119
for a total 2.004 deg
ibex_rotate -o -u -0.506557,0.795105,0.333478 -w ibex-sun -t 2016/07:25:04:29:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.506557,+0.795105,+0.333478
which is R.A. +122.501 Decl. +19.480
missing R.A. +124.691 Decl. +19.585 (ibex-sun)
error is R.A. +2.190 Decl. +0.105
for a total 2.066 deg
ibex_rotate -o -u -0.506557,0.795105,0.333478 -w ibex-sun -t 2016/07:29:12:09:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.506557,+0.795105,+0.333478
which is R.A. +122.501 Decl. +19.480
missing R.A. +128.995 Decl. +18.637 (ibex-sun)
error is R.A. +6.494 Decl. +0.843
for a total 6.195 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 335 apogee:
ibex_rotate -o -u -0.570424,0.75739,0.317768 -w ibex-sun -t 2016/07:29:14:14:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.570424,+0.757390,+0.317768
which is R.A. +126.985 Decl. +18.528
missing R.A. +129.076 Decl. +18.617 (ibex-sun)
error is R.A. +2.091 Decl. +0.089
for a total 1.984 deg
ibex_rotate -o -u -0.570424,0.75739,0.317768 -w ibex-sun -t 2016-08-03T13:06:22.959Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.570424,+0.757390,+0.317768
which is R.A. +126.985 Decl. +18.528
missing R.A. +133.817 Decl. +17.340 (ibex-sun)
error is R.A. +6.832 Decl. +1.188
for a total 6.607 deg
No Lo O-mode.
The orbit 333 SSR dump will be done during the arc A ascending sequence.
Command Approval Checklist is attached.
Ken
----- Original Message -----
From: "Perry.Tim" <tim.perry at orbitalatk.com>
To: "David Heirtzler" <dfh at cisunix.unh.edu>, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS" <IBEXOPS at gmail.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Nigel Angold" <nigel.angold at nasa.gov>, "Paul Janzen" <paul.janzen at umontana.edu>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Michelle Reno" <mreno at swri.edu>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com>
Sent: Thursday, July 7, 2016 9:33:03 AM
Subject: IBEX Orbit#334 ATS Approval ( 21 - 30 july )
All,
Attached is the Orbit #334 ATS and associated planning files for approval.
Approvals are required before 10 July @20:00 gmt.
Please respond to this email thread with your comments and approvals.
Note the following:
1. Battery Balancing
# Orbit# 333 PERIGEE: Battery Balancing
# 2016-07-30T00:09:55.555Z,Perigee,orbit:334
@ECT_SetLongEclipseFlag TRUE $TIME=2016/07:29:23:00:00
@ECT_SetLongEclipseFlag FALSE $TIME=2016/07:30:00:30:00
2. Moon in Lo FOV
2016-07-23T07:42:34.700Z,MoonInLoFovStart,orbit:334
2016-07-24T02:41:44.873Z,MoonInLoFovStop,orbit:334
3. Command Load Constraint Violation Report
==========================
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 2016/07/21 11:53:43 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/07/25 03:59:51 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS, IBEX & OCO-2
Mission Operations
tim.perry at orbitalatk.com
Office (703) 406-5976
Cell (301) 606-1430
Corp Cell (571)-447-8977
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