[Isocops] IBEX Orbit #663 ATS Approval (September 28 – October 7, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Tue Sep 17 16:50:47 EDT 2024
Hi all,
The angle at descending after the apogee Sun maneuver is 4.089 deg.
I have looked at the orbit 0663 ATS file, IBEX_2024_271_o0663a_v001.scr and I approve.
The constraint violations in IBEX_2024_271_o0663a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_271_o0663a_v001.scr match those in the STF, IBEX_2024_271_o0663a_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_271_o0663a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-09-28 10:36:05 and lasts for 38.4 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit663_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 Inertial maneuver at perigee of orbit 0662 left us pointing in safe directions for the orbit 0663 arc A ascending and descending sequences:
ibex_rotate -o -u -0.999149,-0.033372,-0.024223 -w ibex-sun -t 2024/09:28:04:58:23
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. +184.809 Decl. -2.100 (ibex-sun)
error is R.A. +2.896 Decl. +0.712
for a total 2.982 deg
ibex_rotate -o -u -0.999149,-0.033372,-0.024223 -w ibex-sun -t 2024/10:02:07:11:53
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. +188.428 Decl. -3.612 (ibex-sun)
error is R.A. +6.515 Decl. +2.224
for a total 6.878 deg
The Sun 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 -r +188.496 -d -3.640 -w ibex-sun -t 2024/10:02:09:00:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.987031,-0.147442,-0.063487
which is R.A. +188.496 Decl. -3.640
missing R.A. +188.496 Decl. -3.640 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +188.496 -d -3.640 -w ibex-sun -t 2024/10:02:10:30:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.987031,-0.147442,-0.063487
which is R.A. +188.496 Decl. -3.640
missing R.A. +188.552 Decl. -3.663 (ibex-sun)
error is R.A. +0.056 Decl. +0.023
for a total 0.060 deg
ibex_rotate -o -r +188.496 -d -3.640 -w ibex-sun -t 2024/10:06:11:06:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.987031,-0.147442,-0.063487
which is R.A. +188.496 Decl. -3.640
missing R.A. +192.269 Decl. -5.244 (ibex-sun)
error is R.A. +3.773 Decl. +1.604
for a total 4.089 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0664 apogee:
ibex_rotate -o -u -0.980272,-0.177598,-0.086756 -w ibex-sun -t 2024/10:06:13:13:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980272,-0.177598,-0.086756
which is R.A. +190.269 Decl. -4.977
missing R.A. +192.354 Decl. -5.283 (ibex-sun)
error is R.A. +2.085 Decl. +0.306
for a total 2.099 deg
ibex_rotate -o -u -0.980272,-0.177598,-0.086756 -w ibex-sun -t 2024-10-11T13:46:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980272,-0.177598,-0.086756
which is R.A. +190.269 Decl. -4.977
missing R.A. +196.913 Decl. -7.163 (ibex-sun)
error is R.A. +6.644 Decl. +2.186
for a total 6.959 deg
There is no overlap with orbit 0662 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, September 14, 2024 at 01:36
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 #663 ATS Approval (September 28 – October 7, 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 #663. Please respond to this thread with comments and approvals. Approvals for the Orbit 663 ATS are required by COB, 17 September 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/10/06 23:00:00
Eclipse Flag False: 2024/10/07 00:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_271_o0663a_v001.ccvr
# Input files: 1
# IBEX_2024_271_o0663a_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 2024/09/28 03:29:28 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/10/02 10:00:07 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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