[Isocops] IBEX Orbit #463 ATS Approval ( 5 - 14 Oct 2019 )
Weaver, Carol
Carol.Weaver at unh.edu
Tue Sep 24 17:24:03 EDT 2019
Hi all,
I looked at the Orbit 463 ATS: IBEX_2019_278_o0463a_v001.scr and I approve.
The only constraint violations in IBEX_2019_278_o0463a_v001.ccvr are from the removal from the ACT_SetSpinPulseProtectEnable commands (2); The violations are expected.
The PL commands in the v001 ATS match those in the v002 STF (IBEX_2019_278_o0463a_v002.stf).
Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF (IBEX_2019_278_o0463a_v001.oef) and as verified with ibex_orbit.
There is one Star Tracker outage lasting 6 days. It starts 3 days after 15 Re and ends 7 hours after perigee.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file (IBEX_Orbit463_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 sun precession maneuver at perigee leaves us pointing in safe directions for the Orbit 462 arc A ascending and descending sequences:
ibex_rotate -o -r 190.099 -d -4.332 -w ibex-sun -t 2019/10:05:11:27:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.981694,-0.174849,-0.075536
which is R.A. +190.099 Decl. -4.332
missing R.A. +190.737 Decl. -4.640 (ibex-sun)
error is R.A. +0.638 Decl. +0.308
for a total 0.707 deg
ibex_rotate -o -r 190.099 -d -4.332 -w ibex-sun -t 2019/10:09:11:18:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.981694,-0.174849,-0.075536
which is R.A. +190.099 Decl. -4.332
missing R.A. +194.277 Decl. -6.098 (ibex-sun)
error is R.A. +4.178 Decl. +1.766
for a total 4.520 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 194.346 -d -6.125 -w ibex-sun -t 2019/10:09:11:18:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.963287,-0.246362,-0.106698
which is R.A. +194.346 Decl. -6.125
missing R.A. +194.277 Decl. -6.098 (ibex-sun)
error is R.A. +0.069 Decl. +0.027
for a total 0.074 deg
ibex_rotate -o -r 194.346 -d -6.125 -w ibex-sun -t 2019/10:09:14:36:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.963287,-0.246362,-0.106698
which is R.A. +194.346 Decl. -6.125
missing R.A. +194.404 Decl. -6.148 (ibex-sun)
error is R.A. +0.058 Decl. +0.023
for a total 0.062 deg
ibex_rotate -o -r 194.346 -d -6.125 -w ibex-sun -t 2019/10:13:15:53:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.963287,-0.246362,-0.106698
which is R.A. +194.346 Decl. -6.125
missing R.A. +198.258 Decl. -7.715 (ibex-sun)
error is R.A. +3.912 Decl. +1.590
for a total 4.196 deg
The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 464 apogee:
ibex_rotate -o -r 198.400 -d -7.780 -w ibex-sun -t 2019/10:13:19:29:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.940142,-0.312744,-0.135370
which is R.A. +198.400 Decl. -7.780
missing R.A. +198.400 Decl. -7.780 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r 198.400 -d -7.780 -w ibex-sun -t 2019/10:18:15:35:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.940142,-0.312744,-0.135370
which is R.A. +198.400 Decl. -7.780
missing R.A. +202.774 Decl. -9.520 (ibex-sun)
error is R.A. +4.374 Decl. +1.740
for a total 4.661 deg
No Lo O-mode
There is no overlap with orbit 462 commands by manual inspection or by checking at http://ibex.unh.edu/cgi-bin/ats.cgi.
Command approval checklist is attached.
Thanks,
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: "Perry, Timothy" <Timothy.Perry at ngc.com>
Date: Monday, 23September 2019 at 15:11
To: "Weaver, Carol" <Carol.Weaver at unh.edu>, "Chubin, Eric" <Eric.Chubin at ngc.com>, "Joyce, Colin" <Colin.Joyce at unh.edu>, "Heirtzler, David" <David.Heirtzler at unh.edu>, "Dreyer, Sean" <Sean.Dreyer at ngc.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>, "Ken Fairchild (kwfairchild at gmail.com)" <kwfairchild at gmail.com>, Nigel Angold <nigel.angold at nasa.gov>, Nigel Angold <angoldconsulting at earthlink.net>, Paul Janzen <paul.janzen at umontana.edu>, "Perry, Timothy" <Timothy.Perry at ngc.com>, "Tyler, Ryan" <Ryan.Tyler at ngc.com>, "Wesley, Sheral" <Sheral.Wesley at ngc.com>
Subject: IBEX Orbit #463 ATS Approval ( 5 - 14 Oct 2019 )
Caution - External Email
________________________________
All,
Attached are the planning files for Orbit #463
Please respond to this thread with comments and approvals.
Approvals are required by COB on 24 Sept 2019.
Please note the following:
1. Battery Balancing
1. 2 Sun maneuvers
1. Command Load Constraint Violation Report (CCVR)
# Filename: IBEX_2019_278_o0463a_v001.ccvr
# IBEX_2019_278_o0463a_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 2019/10/05 09:06:54 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2019/10/09 14:06:51 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D572FC.CBC184C0]
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*********************
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