[Isocops] IBEX Orbit# 332 ATS Approval (2 Jul16 - 11Jul16) - v001 approval
Ken Fairchild
fair-play at comcast.net
Tue Jun 21 12:40:30 EDT 2016
All,
I have looked at the orbit 332 ATS,
IBEX_2016_184_o0332a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2016_184_o0332a_v001.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2) and because of a long SSR dump contact; the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2016_184_o0332a_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_184_o0332a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts 3 hours before perigee and ends about 2 hours after perigee. No despinning should be required due to this outage.
There is one moon in Lo FOV session in arc B. The ATS start time is about 1 hour after that in the OEF and the ATS end time is the same as that in the OEF. Differences in timing are not unusual.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit332_Contacts.txt,
for all contacts(2).
No battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 331 left us pointing in safe directions for the orbit 332 arc A ascending and descending sequences:
ibex_rotate -o -u -0.152111,0.91064,0.384183 -w ibex-sun -t 2016/07:03:04:09:32
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.152111,+0.910640,+0.384183
which is R.A. +99.483 Decl. +22.593
missing R.A. +102.400 Decl. +22.933 (ibex-sun)
error is R.A. +2.917 Decl. +0.340
for a total 2.711 deg
ibex_rotate -o -u -0.152111,0.91064,0.384183 -w ibex-sun -t 2016/07:06:19:53:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.152111,+0.910640,+0.384183
which is R.A. +99.483 Decl. +22.593
missing R.A. +106.215 Decl. +22.566 (ibex-sun)
error is R.A. +6.732 Decl. +0.027
for a total 6.215 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 -0.226264,0.897743,0.37797 -w ibex-sun -t 2016/07:06:21:36:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.226264,+0.897743,+0.377970
which is R.A. +104.146 Decl. +22.208
missing R.A. +106.290 Decl. +22.559 (ibex-sun)
error is R.A. +2.144 Decl. +0.351
for a total 2.013 deg
ibex_rotate -o -u -0.226264,0.897743,0.37797 -w ibex-sun -t 2016/07:06:23:11:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.226264,+0.897743,+0.377970
which is R.A. +104.146 Decl. +22.208
missing R.A. +106.359 Decl. +22.552 (ibex-sun)
error is R.A. +2.213 Decl. +0.344
for a total 2.075 deg
ibex_rotate -o -u -0.226264,0.897743,0.37797 -w ibex-sun -t 2016/07:11:10:55:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.226264,+0.897743,+0.377970
which is R.A. +104.146 Decl. +22.208
missing R.A. +110.973 Decl. +22.055 (ibex-sun)
error is R.A. +6.827 Decl. +0.153
for a total 6.326 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 333 apogee:
ibex_rotate -o -u -0.302078,0.878444,0.370249 -w ibex-sun -t 2016/07:11:13:07:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.302078,+0.878444,+0.370249
which is R.A. +108.977 Decl. +21.731
missing R.A. +111.061 Decl. +22.042 (ibex-sun)
error is R.A. +2.084 Decl. +0.312
for a total 1.959 deg
ibex_rotate -o -u -0.302078,0.878444,0.370249 -w ibex-sun -t 2016-07-16T12:32:16.781Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.302078,+0.878444,+0.370249
which is R.A. +108.977 Decl. +21.731
missing R.A. +116.070 Decl. +21.246 (ibex-sun)
error is R.A. +7.093 Decl. +0.485
for a total 6.617 deg
No Lo O-mode.
The transmitter off command from the last orbit 331 contact occurs after the orbit 332 arc A ascending bus commands. This should not be a problem.
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>, "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: Monday, June 20, 2016 5:56:30 AM
Subject: IBEX Orbit# 332 ATS Approval (2 Jul16 - 11Jul16)
Guys,
Here are the planning files and ATS for Orbit# 332
Please respond to this email thread with your questions, comments and approvals
Approvals are required before 21 June 16 @2000 UTC
Note the following
1. No PERIGEE Battery Balancing Commands
2. Moon in LO FOV
# Orbit# 332 APOGEE: Moon in FOV Commands
# 2016-07-11T00:08:18.744Z,MoonInLoFovStart,orbit:332
# 2016-07-11T09:31:37.446Z,MoonInLoFovStop,orbit:332
3. Command Load Constraint Violation Report
IBEX_2016_184_o0332a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-006: Planned transmission at 2016/07/11 20:43:00 UTC - 2016/07/11
22:17:00 UTC exceeds the maximum contiguous transmission time of
5400 seconds
· SSR_Dump/Tracking Contact IBEX,USHI01,ADD,07/11/16,193,20:45:00,07/11/16,193,22:15:00,,LAHO 160K IBEX-3 ORbit# 332 SSR_Dump/Tracking Contact
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/07/03 02:42:28 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/07/06 22:41:18 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
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