[Isocops] IBEX Orbit #580 ATS Approval (03 - 12 Sept 2022)
Carol Weaver
Carol.Weaver at unh.edu
Wed Aug 24 13:36:12 EDT 2022
Hi all,
I have looked at the orbit 0580 ATS file, IBEX_2022_246_o0580a_v001.scr and I approve.
The constraint violations in IBEX_2022_246_o0580a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2022_246_o0580a_v001.scr match those in the STF, IBEX_2022_246_o0580a_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_2022_246_o0580a_v001.oef and as verified with ibex_orbit.
There are 2 star tracker outages this orbit.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit580_Contacts.txt for all contacts (2).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0579 left us pointing in safe directions for the orbit 0580 arc A ascending and descending sequences:
ibex_rotate -o -u -0.927839,0.345687,0.140055 -w ibex-sun -t 2022/09:03:15:52:35
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.927839,+0.345687,+0.140055
which is R.A. +159.566 Decl. +8.051
missing R.A. +162.324 Decl. +7.480 (ibex-sun)
error is R.A. +2.758 Decl. +0.571
for a total 2.791 deg
ibex_rotate -o -u -0.927839,0.345687,0.140055 -w ibex-sun -t 2022/09:07:19:55:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.927839,+0.345687,+0.140055
which is R.A. +159.566 Decl. +8.051
missing R.A. +165.973 Decl. +6.011 (ibex-sun)
error is R.A. +6.407 Decl. +2.040
for a total 6.678 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 +166.041 -d +5.983 -w ibex-sun -t 2022/09:07:21:43:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.965182,+0.239914,+0.104233
which is R.A. +166.041 Decl. +5.983
missing R.A. +166.041 Decl. +5.983 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +166.041 -d +5.983 -w ibex-sun -t 2022/09:07:23:13:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.965182,+0.239914,+0.104233
which is R.A. +166.041 Decl. +5.983
missing R.A. +166.098 Decl. +5.961 (ibex-sun)
error is R.A. +0.057 Decl. +0.022
for a total 0.061 deg
ibex_rotate -o -r +166.041 -d +5.983 -w ibex-sun -t 2022/09:12:04:17:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.965182,+0.239914,+0.104233
which is R.A. +166.041 Decl. +5.983
missing R.A. +170.003 Decl. +4.314 (ibex-sun)
error is R.A. +3.962 Decl. +1.669
for a total 4.285 deg
The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0581 apogee:
ibex_rotate -o -r +170.204 -d +4.219 -w ibex-sun -t 2022/09:12:09:35:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.982749,+0.169680,+0.073569
which is R.A. +170.204 Decl. +4.219
missing R.A. +170.204 Decl. +4.219 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +170.204 -d +4.219 -w ibex-sun -t 2022-09-17T05:06:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.982749,+0.169680,+0.073569
which is R.A. +170.204 Decl. +4.219
missing R.A. +174.396 Decl. +2.438 (ibex-sun)
error is R.A. +4.192 Decl. +1.781
for a total 4.548 deg
There is no overlap with orbit 0579 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: NIgel Angold <nangold at princeton.edu>
Date: Wednesday, 2022-August-24 at 12:45
To: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Cc: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, IBEX FDG Group <ADS-IBEX at l3harris.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>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting <angoldconsulting at earthlink.net>, Paul Janzen <Paul.Janzen at mso.umt.edu>, Tyler, Ryan S [US] (SP) <Ryan.Tyler at ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley at ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn at ngc.com>
Subject: Re: [Isocops] IBEX Orbit #580 ATS Approval (03 - 12 Sept 2022)
CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.
I approve IBEX_2022_246_o0580a_v001.scr
Nigel
Perry, Timothy E [US] (SP)<mailto:Timothy.Perry at ngc.com>
August 22, 2022 at 10:48
All,
Attached are the planning files for Orbit #580. Please respond to this thread with comments and approvals.
Approvals are required by 1800, 24 Aug 2022
Please note the following:
1. Apogee Sun Maneuver – 2022/09/07 21:28:15
1. Perigee Sun Maneuver – 2022/09/12 09:20:56
3. No Battery Balancing this orbit
4. Command Load Constraint Violation Report (CCVR)
IBEX_2022_246_o0580a_v001.ccvr
# IBEX_2022_246_o0580a_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 2022/09/03 12:23:39 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/09/07 22:43:21 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
This body part will be downloaded on demand.
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