[Isocops] [Not Virus Scanned] IBEX Orbit #542 ATS Approval (23 Sept – 02 Oct, 2021)
Carol Weaver
Carol.Weaver at unh.edu
Mon Sep 13 15:04:20 EDT 2021
Hi all,
I have looked at the orbit 0542 ATS file, IBEX_2021_266_o0542a_v001.scr and I approve.
The constraint violations in IBEX_2021_266_o0542a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2021_266_o0542a_v001.scr match those in the STF, IBEX_2021_266_o0542a_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_2021_266_o0542a_v001.oef and as verified with ibex_orbit.
There are no 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_Orbit542_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, and more than 1 hour away from maneuver.
The Sun maneuver at perigee of orbit 0541 left us pointing in safe directions for the orbit 0542 arc A ascending and descending sequences:
ibex_rotate -o -r +179.897 -d +0.052 -w ibex-sun -t 2021/09:23:14:00:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999998,+0.001798,+0.000908
which is R.A. +179.897 Decl. +0.052
missing R.A. +180.445 Decl. -0.213 (ibex-sun)
error is R.A. +0.548 Decl. +0.265
for a total 0.608 deg
ibex_rotate -o -r +179.897 -d +0.052 -w ibex-sun -t 2021/09:27:05:40:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999998,+0.001798,+0.000908
which is R.A. +179.897 Decl. +0.052
missing R.A. +183.623 Decl. -1.564 (ibex-sun)
error is R.A. +3.726 Decl. +1.616
for a total 4.060 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 -0.999269,-0.029867,-0.023874 -w ibex-sun -t 2021/09:27:07:23:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999269,-0.029867,-0.023874
which is R.A. +181.712 Decl. -1.368
missing R.A. +183.687 Decl. -1.590 (ibex-sun)
error is R.A. +1.975 Decl. +0.222
for a total 1.987 deg
ibex_rotate -o -u -0.999269,-0.029867,-0.023874 -w ibex-sun -t 2021/09:27:08:58:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999269,-0.029867,-0.023874
which is R.A. +181.712 Decl. -1.368
missing R.A. +183.746 Decl. -1.615 (ibex-sun)
error is R.A. +2.034 Decl. +0.247
for a total 2.049 deg
ibex_rotate -o -u -0.999269,-0.029867,-0.023874 -w ibex-sun -t 2021/10:01:19:48:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999269,-0.029867,-0.023874
which is R.A. +181.712 Decl. -1.368
missing R.A. +187.878 Decl. -3.385 (ibex-sun)
error is R.A. +6.166 Decl. +2.017
for a total 6.483 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0543 apogee:
ibex_rotate -o -u -0.993511,-0.100444,-0.053347 -w ibex-sun -t 2021/10:01:23:23:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993511,-0.100444,-0.053347
which is R.A. +185.773 Decl. -3.058
missing R.A. +188.018 Decl. -3.451 (ibex-sun)
error is R.A. +2.245 Decl. +0.393
for a total 2.275 deg
[carolweav at ena 0542]$
[carolweav at ena 0542]$ ibex_rotate -o -u -0.993511,-0.100444,-0.053347 -w ibex-sun -t 2021-10-06T15:57:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993511,-0.100444,-0.053347
which is R.A. +185.773 Decl. -3.058
missing R.A. +192.170 Decl. -5.209 (ibex-sun)
error is R.A. +6.397 Decl. +2.151
for a total 6.733 deg
There is no overlap with orbit 0541 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: NIgel Angold <nangold at princeton.edu>
Date: Monday, 2021-September-13 at 14:46
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>, ADS-IBEX at l3harris.com <ADS-IBEX at l3harris.com>, IBEXOPS at gmail.com <IBEXOPS at gmail.com>, isocops at lists.sr.unh.edu <isocops at lists.sr.unh.edu>, fair-play at comcast.net <fair-play at comcast.net>, kwfairchild at gmail.com <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting at earthlink.net <angoldconsulting at earthlink.net>, Paul.Janzen at mso.umt.edu <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: [Not Virus Scanned] [Isocops] IBEX Orbit #542 ATS Approval (23 Sept – 02 Oct, 2021)
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_2021_266_o0542a_v001.scr
Nigel
All,
Attached are the planning files for Orbit #542. Please respond to this thread with comments and approvals.
Approvals are required by 20:00, 13 Sept 2021
Please note the following:
1. Battery Balancing this orbit
Begin 2021/10/02 05:00:00– End 2021/10/02 06:30:00
1. Command Load Constraint Violation Report (CCVR)
IBEX_2021_266_o0542a_v001.ccvr
# Input files: 1
# IBEX_2021_266_o0542a_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 2021/09/23 11:06:37 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2021/09/27 08:28:57 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com<mailto:timothy.perry at ngc.com>
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D7A8B0.A0571110]
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