[Isocops] IBEX Orbit #665 ATS Approval (October 16 - 26, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Fri Oct 4 09:19:33 EDT 2024
Hi all,
I have looked at the orbit 0665 ATS file, IBEX_2024_290_o0665a_v001.scr and I approve.
The constraint violations in IBEX_2024_290_0665_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and the battery charge dropping during the Eclipse. The violations are acceptable.
The PL commands in IBEX_2024_290_o0665a_v001.scr match those in the STF, IBEX_2024_290_o0665a_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_290_o0665a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-10-16 14:40:04 and lasts for 85.4 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit665_Contacts.txt for all contacts (3).
Eclipse flag is set on 1.5 hours before the eclipse begins at 2024-10-25 12:13:01. Eclipse flag is set off 14.6 mins after the eclipse ends at 2024-10-25 13:22:24. These values match the eclipse planning.
The Sun maneuver at perigee of orbit 0664 left us pointing in safe directions for the orbit 0665 arc A ascending and descending sequences:
ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:15:18:22:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.923698,-0.351618,-0.152141
which is R.A. +200.840 Decl. -8.751
missing R.A. +200.840 Decl. -8.751 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:16:16:02:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.923698,-0.351618,-0.152141
which is R.A. +200.840 Decl. -8.751
missing R.A. +201.715 Decl. -9.131 (ibex-sun)
error is R.A. +0.875 Decl. +0.380
for a total 0.944 deg
ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:20:10:21:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.923698,-0.351618,-0.152141
which is R.A. +200.840 Decl. -8.751
missing R.A. +205.185 Decl. -10.432 (ibex-sun)
error is R.A. +4.345 Decl. +1.681
for a total 4.602 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 -0.904295,-0.387731,-0.178648 -w ibex-sun -t 2024/10:20:12:04:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.904295,-0.387731,-0.178648
which is R.A. +203.208 Decl. -10.291
missing R.A. +205.252 Decl. -10.456 (ibex-sun)
error is R.A. +2.044 Decl. +0.165
for a total 2.017 deg
ibex_rotate -o -u -0.904295,-0.387731,-0.178648 -w ibex-sun -t 2024/10:20:13:40:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.904295,-0.387731,-0.178648
which is R.A. +203.208 Decl. -10.291
missing R.A. +205.313 Decl. -10.479 (ibex-sun)
error is R.A. +2.105 Decl. +0.188
for a total 2.079 deg
ibex_rotate -o -u -0.904295,-0.387731,-0.178648 -w ibex-sun -t 2024/10:25:03:26:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.904295,-0.387731,-0.178648
which is R.A. +203.208 Decl. -10.291
missing R.A. +209.677 Decl. -12.095 (ibex-sun)
error is R.A. +6.469 Decl. +1.803
for a total 6.597 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0666 apogee:
ibex_rotate -o -u -0.866903,-0.453726,-0.206426 -w ibex-sun -t 2024/10:25:05:26:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.866903,-0.453726,-0.206426
which is R.A. +207.627 Decl. -11.913
missing R.A. +209.761 Decl. -12.128 (ibex-sun)
error is R.A. +2.134 Decl. +0.215
for a total 2.098 deg
ibex_rotate -o -u -0.866903,-0.453726,-0.206426 -w ibex-sun -t 2024-10-30T07:20:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.866903,-0.453726,-0.206426
which is R.A. +207.627 Decl. -11.913
missing R.A. +214.650 Decl. -13.820 (ibex-sun)
error is R.A. +7.024 Decl. +1.907
for a total 7.107 deg
There is no overlap with orbit 0664 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, October 2, 2024 at 16:34
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 #665 ATS Approval (October 16 - 26, 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 #665. Please respond to this thread with comments and approvals. Approvals for the Orbit 665 ATS are required by COB, 05 October 2024.
Please note the following:
Eclipse – Perigee
Eclipse Flag True: 2024/10/25 10:43:00
Eclipse Flag False: 2024/10/25 13:37:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_290_0665_v001.ccvr
# Input files: 1
# IBEX_2024_290_o0665a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-015: Battery charge falls below minimum from 2024/10/25 13:37:00 UTC -
2024/10/25 22:02:00 UTC. Lowest charge level is 742.436594
watt-minutes during this interval.
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/10/16 14:39:32 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/10/20 13:10:01 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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