[Isocops] IBEX Orbit #616 ATS Approval (29 July – 07 Aug 2023)
Carol Weaver
Carol.Weaver at unh.edu
Wed Jul 19 13:17:48 EDT 2023
Hi all,
I have looked at the orbit 0616 ATS file, IBEX_2023_210_o0616a_v001.scr and I approve.
The constraint violations in IBEX_2023_210_o0616a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_210_o0616a_v001.scr match those in the STF, IBEX_2023_210_o0616a_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_2023_210_o0616a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2023-07-29 18:00:43 and lasts for ~26 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit616_Contacts.txt for all contacts (2).
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 Inertial maneuver at perigee of orbit 0615 left us pointing in safe directions for the orbit 0616 arc A ascending and descending sequences:
ibex_rotate -o -u -0.546425,0.771944,0.324842 -w ibex-sun -t 2023/07:29:14:03:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.546425,+0.771944,+0.324842
which is R.A. +125.293 Decl. +18.956
missing R.A. +128.257 Decl. +18.778 (ibex-sun)
error is R.A. +2.964 Decl. +0.178
for a total 2.810 deg
ibex_rotate -o -u -0.546425,0.771944,0.324842 -w ibex-sun -t 2023/08:02:03:00:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.546425,+0.771944,+0.324842
which is R.A. +125.293 Decl. +18.956
missing R.A. +131.616 Decl. +17.967 (ibex-sun)
error is R.A. +6.323 Decl. +0.989
for a total 6.078 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 -0.606906,0.733076,0.307024 -w ibex-sun -t 2023/08:02:04:43:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606906,+0.733076,+0.307024
which is R.A. +129.621 Decl. +17.880
missing R.A. +131.686 Decl. +17.950 (ibex-sun)
error is R.A. +2.065 Decl. +0.070
for a total 1.966 deg
ibex_rotate -o -u -0.606906,0.733076,0.307024 -w ibex-sun -t 2023/08:02:06:18:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606906,+0.733076,+0.307024
which is R.A. +129.621 Decl. +17.880
missing R.A. +131.751 Decl. +17.934 (ibex-sun)
error is R.A. +2.130 Decl. +0.054
for a total 2.027 deg
ibex_rotate -o -u -0.606906,0.733076,0.307024 -w ibex-sun -t 2023/08:06:15:11:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606906,+0.733076,+0.307024
which is R.A. +129.621 Decl. +17.880
missing R.A. +136.090 Decl. +16.749 (ibex-sun)
error is R.A. +6.469 Decl. +1.131
for a total 6.278 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0617 apogee:
ibex_rotate -o -u -0.665097,0.68868,0.288731 -w ibex-sun -t 2023/08:06:17:50:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.665097,+0.688680,+0.288731
which is R.A. +134.002 Decl. +16.782
missing R.A. +136.197 Decl. +16.714 (ibex-sun)
error is R.A. +2.195 Decl. +0.068
for a total 2.103 deg
ibex_rotate -o -u -0.665097,0.68868,0.288731 -w ibex-sun -t 2023-08-11T15:41:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.665097,+0.688680,+0.288731
which is R.A. +134.002 Decl. +16.782
missing R.A. +140.743 Decl. +15.357 (ibex-sun)
error is R.A. +6.741 Decl. +1.425
for a total 6.632 deg
There is no overlap with orbit 0615 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: Friday, July 14, 2023 at 13:50
To: 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>, kwfairchild at gmail.com <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting <angoldconsulting at earthlink.net>, Paul.Janzen at mso.umt.edu <Paul.Janzen at mso.umt.edu>, 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 #616 ATS Approval (29 July – 07 Aug 2023)
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 #616. Please respond to this thread with comments and approvals. Approvals are required by COB, 18 July 2023
Please note the following:
1. Battery Balancing this Orbit.
Begin 2023/08/07 02:00:00– End 2023/08/07 03:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_210_o0616a_v001.ccvr
# Input files: 1
# IBEX_2023_210_o0616a_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 2023/07/29 12:09:38 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/08/02 05:48:43 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
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