[Isocops] IBEX Orbit #643 ATS Approval (March 31 – April 09, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Mon Mar 18 11:33:02 EDT 2024
Hi all,
I have looked at the orbit 0643 ATS file, IBEX_2024_090_o0643a_v001.scr and I approve.
The constraint violations in IBEX_2024_090_o0643a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_090_o0643a_v001.scr match those in the STF, IBEX_2024_090_o0643a_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_090_o0643a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-04-08 06:28:43 and lasts for 7.7 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit643_Contacts.txt for all contacts (3).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0642 left us pointing in safe directions for the orbit 0643 arc A ascending and descending sequences:
ibex_rotate -o -u 0.99079,0.127538,0.045485 -w ibex-sun -t 2024/03:31:02:18:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.990790,+0.127538,+0.045485
which is R.A. +7.335 Decl. +2.607
missing R.A. +9.662 Decl. +4.139 (ibex-sun)
error is R.A. +2.327 Decl. +1.532
for a total 2.783 deg
ibex_rotate -o -u 0.99079,0.127538,0.045485 -w ibex-sun -t 2024/04:03:15:48:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.990790,+0.127538,+0.045485
which is R.A. +7.335 Decl. +2.607
missing R.A. +12.986 Decl. +5.576 (ibex-sun)
error is R.A. +5.651 Decl. +2.969
for a total 6.370 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 0.977459,0.19741,0.074857 -w ibex-sun -t 2024/04:03:17:31:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.977459,+0.197410,+0.074857
which is R.A. +11.418 Decl. +4.293
missing R.A. +13.052 Decl. +5.605 (ibex-sun)
error is R.A. +1.634 Decl. +1.312
for a total 2.091 deg
ibex_rotate -o -u 0.977459,0.19741,0.074857 -w ibex-sun -t 2024/04:03:19:06:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.977459,+0.197410,+0.074857
which is R.A. +11.418 Decl. +4.293
missing R.A. +13.113 Decl. +5.631 (ibex-sun)
error is R.A. +1.695 Decl. +1.338
for a total 2.154 deg
ibex_rotate -o -u 0.977459,0.19741,0.074857 -w ibex-sun -t 2024/04:08:03:26:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.977459,+0.197410,+0.074857
which is R.A. +11.418 Decl. +4.293
missing R.A. +17.040 Decl. +7.259 (ibex-sun)
error is R.A. +5.622 Decl. +2.966
for a total 6.330 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0644 apogee:
ibex_rotate -o -u 0.957926,0.266791,0.10583 -w ibex-sun -t 2024/04:08:05:44:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.957926,+0.266791,+0.105830
which is R.A. +15.563 Decl. +6.075
missing R.A. +17.123 Decl. +7.289 (ibex-sun)
error is R.A. +1.560 Decl. +1.214
for a total 1.968 deg
ibex_rotate -o -u 0.957926,0.266791,0.10583 -w ibex-sun -t 2024-04-13T06:16:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.957926,+0.266791,+0.105830
which is R.A. +15.563 Decl. +6.075
missing R.A. +21.788 Decl. +9.160 (ibex-sun)
error is R.A. +6.225 Decl. +3.085
for a total 6.898 deg
There is no overlap with orbit 0642 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: Saturday, March 16, 2024 at 11:35
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 #643 ATS Approval (March 31 – April 09, 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 #643. Please respond to this thread with comments and approvals. Approvals are required by 20:00, 20 March 2024.
Please note the following:
No Battery Balancing
Command Load Constraint Violation Report (CCVR)
IBEX_2024_090_o0643a_v001.ccvr
# Input files: 1
# IBEX_2024_090_o0643a_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 2024/03/31 00:45:35 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/04/03 18:36:21 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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