[Isocops] IBEX Orbit #629 ATS Approval ( Nov 22 – Dec 02, 2023) Version #2
Carol Weaver
Carol.Weaver at unh.edu
Mon Nov 20 10:59:54 EST 2023
Hi all,
The angle at descending after the apogee sun maneuver is 4.126 deg.
I have looked at the orbit 0629 ATS file, IBEX_2023_326_o0629a_v002.scr and I approve.
The constraint violations in IBEX_2023_326_o0629a_v002.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_326_o0629a_v002.scr match those in the STF, IBEX_2023_326_o0629a_v004.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_2023_326_o0629a_v002.oef and as verified with ibex_orbit.
There are 2 star tracker outages this orbit. The first outage begins at 2023-11-25 00:11:23 and lasts for 41.4 hours. The second outage begins at 2023-11-29 01:15:59 and lasts for 10.5 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit629_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 0628 left us pointing in safe directions for the orbit 0629 arc A ascending and descending sequences:
ibex_rotate -o -u -0.535623,-0.771177,-0.34408 -w ibex-sun -t 2023/11:23:11:22:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.535624,-0.771178,-0.344081
which is R.A. +235.218 Decl. -20.126
missing R.A. +238.446 Decl. -20.295 (ibex-sun)
error is R.A. +3.228 Decl. +0.169
for a total 3.034 deg
ibex_rotate -o -u -0.535623,-0.771177,-0.34408 -w ibex-sun -t 2023/11:27:12:55:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.535624,-0.771178,-0.344081
which is R.A. +235.218 Decl. -20.126
missing R.A. +242.732 Decl. -21.055 (ibex-sun)
error is R.A. +7.514 Decl. +0.929
for a total 7.094 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 +242.810 -d -21.067 -w ibex-sun -t 2023/11:27:14:43:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.426401,-0.830043,-0.359459
which is R.A. +242.810 Decl. -21.067
missing R.A. +242.810 Decl. -21.067 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +242.810 -d -21.067 -w ibex-sun -t 2023/11:27:16:13:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.426401,-0.830043,-0.359459
which is R.A. +242.810 Decl. -21.067
missing R.A. +242.876 Decl. -21.078 (ibex-sun)
error is R.A. +0.066 Decl. +0.011
for a total 0.062 deg
ibex_rotate -o -r +242.810 -d -21.067 -w ibex-sun -t 2023/12:01:17:26:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.426401,-0.830043,-0.359459
which is R.A. +242.810 Decl. -21.067
missing R.A. +247.179 Decl. -21.760 (ibex-sun)
error is R.A. +4.369 Decl. +0.693
for a total 4.126 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0630 apogee:
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023/12:01:19:43:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.362113,-0.851554,-0.379117
which is R.A. +246.963 Decl. -22.279
missing R.A. +247.285 Decl. -21.779 (ibex-sun)
error is R.A. +0.322 Decl. +0.500
for a total 0.582 deg
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023-12-06T18:01:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.362113,-0.851554,-0.379117
which is R.A. +246.963 Decl. -22.279
missing R.A. +252.689 Decl. -22.463 (ibex-sun)
error is R.A. +5.726 Decl. +0.184
for a total 5.298 deg
There is an overlap with a contact in the orbit 0628 commands. This is acceptable.
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: Thursday, November 16, 2023 at 15:57
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 #629 ATS Approval ( Nov 22 – Dec 02, 2023) Version #2
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 #629 Version# 2. Please respond to this thread with comments and approvals. Approvals are required by COB 21 Nov 2023. The reason for the change is that we regenerated products with a new star tracker keep out angle.
Please note the following:
1. Battery Balancing
The eclipse flag has been set for the second eclipse.
Start: 2023/12/02 06:00:00 – End: 2023/12/02 07:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_326_o0629a_v002.ccvr
# Input files: 1
# IBEX_2023_326_o0629a_v002.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 2023/11/23 09:49:19 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/11/27 15:43:29 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
Cell (301) 606-1430
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20231120/f9cc54c9/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev17_0629_CEW_v02.docx
Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size: 47565 bytes
Desc: IBEX-Command-Approval-Checklist-Rev17_0629_CEW_v02.docx
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20231120/f9cc54c9/IBEX-Command-Approval-Checklist-Rev17_0629_CEW_v02-0001.docx>
More information about the Isocops
mailing list