[Isocops] IBEX Orbit #581 ATS Approval (12 - 21 Sept 2022)
Carol Weaver
Carol.Weaver at unh.edu
Fri Sep 2 10:35:12 EDT 2022
Hi all,
I have looked at the orbit 0581 ATS file, IBEX_2022_255_o0581a_v001.scr and I approve.
The constraint violations in IBEX_2022_255_o0581a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and contacts being close together on 2022-09-21. The violations are acceptable.
The PL commands in IBEX_2022_255_o0581a_v001.scr match those in the STF, IBEX_2022_255_o0581a_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_255_o0581a_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_Orbit581_Contacts.txt for all contacts (4).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, and more than 15 minutes away from a maneuver.
The Sun maneuver at perigee of orbit 0580 left us pointing in safe directions for the orbit 0581 arc A ascending and descending sequences:
ibex_rotate -o -r +170.204 -d +4.219 -w ibex-sun -t 2022/09:12:19:25:43
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. +170.562 Decl. +4.049 (ibex-sun)
error is R.A. +0.358 Decl. +0.170
for a total 0.395 deg
ibex_rotate -o -r +170.204 -d +4.219 -w ibex-sun -t 2022/09:16:17:33:47
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. +173.965 Decl. +2.616 (ibex-sun)
error is R.A. +3.761 Decl. +1.603
for a total 4.082 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 -0.989232,0.137936,0.048919 -w ibex-sun -t 2022/09:16:19:16:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.989232,+0.137936,+0.048919
which is R.A. +172.062 Decl. +2.804
missing R.A. +174.029 Decl. +2.590 (ibex-sun)
error is R.A. +1.967 Decl. +0.214
for a total 1.976 deg
ibex_rotate -o -u -0.989232,0.137936,0.048919 -w ibex-sun -t 2022/09:16:20:52:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.989232,+0.137936,+0.048919
which is R.A. +172.062 Decl. +2.804
missing R.A. +174.088 Decl. +2.565 (ibex-sun)
error is R.A. +2.026 Decl. +0.239
for a total 2.037 deg
ibex_rotate -o -u -0.989232,0.137936,0.048919 -w ibex-sun -t 2022/09:21:14:14:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.989232,+0.137936,+0.048919
which is R.A. +172.062 Decl. +2.804
missing R.A. +178.440 Decl. +0.687 (ibex-sun)
error is R.A. +6.378 Decl. +2.117
for a total 6.717 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0582 apogee:
ibex_rotate -o -u -0.997725,0.06487,0.018325 -w ibex-sun -t 2022/09:21:19:19:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.997725,+0.064870,+0.018325
which is R.A. +176.280 Decl. +1.050
missing R.A. +178.634 Decl. +0.593 (ibex-sun)
error is R.A. +2.354 Decl. +0.457
for a total 2.398 deg
ibex_rotate -o -u -0.997725,0.06487,0.018325 -w ibex-sun -t 2022-09-26T13:11:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.997725,+0.064870,+0.018325
which is R.A. +176.280 Decl. +1.050
missing R.A. +182.782 Decl. -1.192 (ibex-sun)
error is R.A. +6.502 Decl. +2.242
for a total 6.878 deg
There is no overlap with orbit 0580 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Date: Wednesday, 2022-August-31 at 10:59
To: Carol Weaver <carol.weaver at unh.edu>, David Heirtzler <David.Heirtzler at unh.edu>, IBEX FDG Group <ADS-IBEX at l3harris.com>, IBEXOPS <IBEXOPS at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting <angoldconsulting at earthlink.net>, Paul Janzen <Paul.Janzen at mso.umt.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.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>, Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>, 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: IBEX Orbit #581 ATS Approval (12 - 21 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.
All,
Attached are the planning files for Orbit #581. Please respond to this thread with comments and approvals.
Approvals are required by 2000, 2 Sept 2022
Please note the following:
1. Battery Balancing this orbit
Begin 2022/09/21 21:00:00– End 2022/09/21 22:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2022_255_o0581a_v001.ccvr
# IBEX_2022_255_o0581a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-006: Planned transmission at 2022/09/21 11:58:00 UTC - 2022/09/21
13:02:00 UTC is followed by one or more additional transmissions
which, when combined, exceed the maximum transmission time of 5400
seconds within a 18000-second window (total planned transmission
time this window is 7680.000 seconds)
IBX-CLC-006: Planned transmission at 2022/09/21 14:28:00 UTC - 2022/09/21
15:32:00 UTC is preceded by one or more additional transmissions
which, when combined, exceed the maximum transmission time of 5400
seconds within a 18000-second window (total planned transmission
time this window is 7680.000 seconds)
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/09/12 14:55:05 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/09/16 20:22:01 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20220902/d988d001/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16h_0581_CEW.docx
Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size: 47445 bytes
Desc: IBEX-Command-Approval-Checklist-Rev16h_0581_CEW.docx
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20220902/d988d001/IBEX-Command-Approval-Checklist-Rev16h_0581_CEW-0001.docx>
More information about the Isocops
mailing list