[Isocops] IBEX Orbit #662 ATS Approval (September 18 - 28, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Thu Sep 5 10:55:59 EDT 2024
Hi all,
I have looked at the orbit 0662 ATS file, IBEX_2024_262_o0662a_v001.scr and I approve.
The constraint violations in IBEX_2024_262_o0662a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_262_o0662a_v001.scr match those in the STF, IBEX_2024_262_o0662a_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_262_o0662a_v001.oef and as verified with ibex_orbit.
I note that the 14Re values in Crossing times is 10 minutes different from the ibex_orbit. All other crossings are consistent between the files.
There is 1 star tracker outage this orbit. Outage begins at 2024-09-12 07:25:35 and lasts for 189.1 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit662_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 Sun maneuver at perigee of orbit 0661 left us pointing in safe directions for the orbit 0662 arc A ascending and descending sequences:
ibex_rotate -o -r +175.538 -d +1.945 -w ibex-sun -t 2024/09:17:21:32:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.996395,+0.077753,+0.033940
which is R.A. +175.538 Decl. +1.945
missing R.A. +175.538 Decl. +1.945 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +175.538 -d +1.945 -w ibex-sun -t 2024/09:18:18:45:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.996395,+0.077753,+0.033940
which is R.A. +175.538 Decl. +1.945
missing R.A. +176.338 Decl. +1.567 (ibex-sun)
error is R.A. +0.800 Decl. +0.378
for a total 0.884 deg
ibex_rotate -o -r +175.538 -d +1.945 -w ibex-sun -t 2024/09:22:12:53:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.996395,+0.077753,+0.033940
which is R.A. +175.538 Decl. +1.945
missing R.A. +179.618 Decl. +0.185 (ibex-sun)
error is R.A. +4.080 Decl. +1.760
for a total 4.443 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 -0.99918,0.039922,0.006737 -w ibex-sun -t 2024/09:22:14:36:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999180,+0.039922,+0.006737
which is R.A. +177.712 Decl. +0.386
missing R.A. +179.682 Decl. +0.158 (ibex-sun)
error is R.A. +1.970 Decl. +0.228
for a total 1.983 deg
ibex_rotate -o -u -0.99918,0.039922,0.006737 -w ibex-sun -t 2024/09:22:16:11:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999180,+0.039922,+0.006737
which is R.A. +177.712 Decl. +0.386
missing R.A. +179.741 Decl. +0.133 (ibex-sun)
error is R.A. +2.029 Decl. +0.253
for a total 2.044 deg
ibex_rotate -o -u -0.99918,0.039922,0.006737 -w ibex-sun -t 2024/09:27:05:35:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999180,+0.039922,+0.006737
which is R.A. +177.712 Decl. +0.386
missing R.A. +183.910 Decl. -1.676 (ibex-sun)
error is R.A. +6.198 Decl. +2.062
for a total 6.532 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0663 apogee:
ibex_rotate -o -u -0.999149,-0.033372,-0.024223 -w ibex-sun -t 2024/09:27:07:45:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999149,-0.033372,-0.024223
which is R.A. +181.913 Decl. -1.388
missing R.A. +183.996 Decl. -1.716 (ibex-sun)
error is R.A. +2.083 Decl. +0.328
for a total 2.108 deg
ibex_rotate -o -u -0.999149,-0.033372,-0.024223 -w ibex-sun -t 2024-10-02T08:56:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999149,-0.033372,-0.024223
which is R.A. +181.913 Decl. -1.388
missing R.A. +188.493 Decl. -3.639 (ibex-sun)
error is R.A. +6.580 Decl. +2.251
for a total 6.948 deg
There is no overlap with orbit 0661 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, September 4, 2024 at 18:54
To: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, Coca Gonzales, Andrea [US] (SP) <Andrea.CocaGonzales 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 #662 ATS Approval (September 18 - 28, 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 #662. Please respond to this thread with comments and approvals. Approvals for the Orbit 662 ATS are required by COB, 07 September 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/09/27 17:00:00
Eclipse Flag False: 2024/09/27 18:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_262_o0662a_v001.ccvr
# Input files: 1
# IBEX_2024_262_o0662a_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 2024/09/18 17:15:07 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/09/22 15:41:36 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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