[Isocops] IBEX Orbit #641 ATS Approval (March 12 - 21, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Wed Mar 6 11:06:32 EST 2024
Hi all,
I have looked at the orbit 0641 ATS file, IBEX_2024_072_o0641a_v001.scr and I approve.
The constraint violations in IBEX_2024_072_o0641a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_072_o0641a_v001.scr match those in the STF, IBEX_2024_072_o0641a_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_2024_072_o0641a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-03-20 21:37:32 and lasts for 9.0 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit641_Contacts.txt for all contacts (3).
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 0640 left us pointing in safe directions for the orbit 0641 arc A ascending and descending sequences:
ibex_rotate -o -u 0.992133,-0.110514,-0.058819 -w ibex-sun -t 2024/03:12:15:12:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.992133,-0.110514,-0.058819
which is R.A. +353.644 Decl. -3.372
missing R.A. +352.829 Decl. -3.119 (ibex-sun)
error is R.A. +0.815 Decl. +0.253
for a total 0.852 deg
ibex_rotate -o -u 0.992133,-0.110514,-0.058819 -w ibex-sun -t 2024/03:16:08:07:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.992133,-0.110514,-0.058819
which is R.A. +353.644 Decl. -3.372
missing R.A. +356.319 Decl. -1.581 (ibex-sun)
error is R.A. +2.675 Decl. +1.791
for a total 3.217 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 0.999063,-0.035202,-0.025182 -w ibex-sun -t 2024/03:16:09:50:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999063,-0.035202,-0.025182
which is R.A. +357.982 Decl. -1.443
missing R.A. +356.384 Decl. -1.552 (ibex-sun)
error is R.A. +1.598 Decl. +0.109
for a total 1.601 deg
ibex_rotate -o -u 0.999063,-0.035202,-0.025182 -w ibex-sun -t 2024/03:16:11:25:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999063,-0.035202,-0.025182
which is R.A. +357.982 Decl. -1.443
missing R.A. +356.445 Decl. -1.525 (ibex-sun)
error is R.A. +1.537 Decl. +0.082
for a total 1.538 deg
ibex_rotate -o -u 0.999063,-0.035202,-0.025182 -w ibex-sun -t 2024/03:20:23:42:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999063,-0.035202,-0.025182
which is R.A. +357.982 Decl. -1.443
missing R.A. +0.477 Decl. +0.224 (ibex-sun)
error is R.A. +357.505 Decl. +1.667
for a total 3.001 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0642 apogee:
ibex_rotate -o -u 0.99993,0.010454,-0.005515 -w ibex-sun -t 2024/03:21:07:16:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999930,+0.010454,-0.005515
which is R.A. +0.599 Decl. -0.316
missing R.A. +0.750 Decl. +0.328 (ibex-sun)
error is R.A. +0.151 Decl. +0.644
for a total 0.662 deg
ibex_rotate -o -u 0.99993,0.010454,-0.005515 -w ibex-sun -t 2024-03-26T01:42:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999930,+0.010454,-0.005515
which is R.A. +0.599 Decl. -0.316
missing R.A. +5.180 Decl. +2.260 (ibex-sun)
error is R.A. +4.581 Decl. +2.576
for a total 5.255 deg
There is no overlap with orbit 0640 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: Monday, March 4, 2024 at 13:03
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 at earthlink.net <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 #641 ATS Approval (March 12 - 21, 2024)
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 #641. Please respond to this thread with comments and approvals. Approvals are required by COB 06 March 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/03/21 11:00:00
Eclipse Flag False: 2024/03/21 12:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_072_o0641a_v001.ccvr
# Input files: 1
# IBEX_2024_072_o0641a_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 2024/03/12 13:28:51 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/03/16 10:55:23 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
IBEX MOC (703)404-7470
Cell (301) 606-1430
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