[Isocops] IBEX Orbit #644 ATS Approval (April 09 - 18, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Tue Mar 26 15:32:27 EDT 2024
Hi all,
I have looked at the orbit 0644 ATS file, IBEX_2024_099_o0644a_v001.scr and I approve.
The constraint violations in IBEX_2024_099_o0644a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_099_o0644a_v001.scr match those in the STF, IBEX_2024_099_o0644a_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_099_o0644a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-04-17 12:57:18 and lasts for 7.6 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit644_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 0643 left us pointing in safe directions for the orbit 0644 arc A ascending and descending sequences:
ibex_rotate -o -u 0.957926,0.266791,0.10583 -w ibex-sun -t 2024/04:09:03:06:00
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. +17.913 Decl. +7.573 (ibex-sun)
error is R.A. +2.350 Decl. +1.498
for a total 2.773 deg
ibex_rotate -o -u 0.957926,0.266791,0.10583 -w ibex-sun -t 2024/04:12:18:43:53
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. +21.339 Decl. +8.978 (ibex-sun)
error is R.A. +5.776 Decl. +2.903
for a total 6.420 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 0.93263,0.334848,0.134453 -w ibex-sun -t 2024/04:12:20:27:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.932630,+0.334848,+0.134453
which is R.A. +19.750 Decl. +7.727
missing R.A. +21.406 Decl. +9.005 (ibex-sun)
error is R.A. +1.656 Decl. +1.278
for a total 2.078 deg
ibex_rotate -o -u 0.93263,0.334848,0.134453 -w ibex-sun -t 2024/04:12:22:02:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.932630,+0.334848,+0.134453
which is R.A. +19.750 Decl. +7.727
missing R.A. +21.468 Decl. +9.030 (ibex-sun)
error is R.A. +1.718 Decl. +1.303
for a total 2.142 deg
ibex_rotate -o -u 0.93263,0.334848,0.134453 -w ibex-sun -t 2024/04:17:08:56:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.932630,+0.334848,+0.134453
which is R.A. +19.750 Decl. +7.727
missing R.A. +25.555 Decl. +10.611 (ibex-sun)
error is R.A. +5.805 Decl. +2.884
for a total 6.415 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0645 apogee:
ibex_rotate -o -u 0.900853,0.401802,0.164376 -w ibex-sun -t 2024/04:17:11:12:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.900853,+0.401802,+0.164376
which is R.A. +24.038 Decl. +9.461
missing R.A. +25.638 Decl. +10.639 (ibex-sun)
error is R.A. +1.600 Decl. +1.178
for a total 1.967 deg
ibex_rotate -o -u 0.900853,0.401802,0.164376 -w ibex-sun -t 2024-04-22T10:22:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.900853,+0.401802,+0.164376
which is R.A. +24.038 Decl. +9.461
missing R.A. +30.297 Decl. +12.355 (ibex-sun)
error is R.A. +6.259 Decl. +2.894
for a total 6.792 deg
There is no overlap with orbit 0643 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: Monday, March 25, 2024 at 14:46
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 #644 ATS Approval (April 09 - 18, 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 #644. Please respond to this thread with comments and approvals. Approvals are required by COB, 29 March 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/04/17 20:00:00
Eclipse Flag False: 2024/04/17 21:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_099_o0644a_v001.ccvr
# Input files: 1
# IBEX_2024_099_o0644a_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 2024/04/09 01:36:07 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/04/12 21:32:07 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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20240326/7705c173/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev17_0644_CEW_v01.docx
Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size: 47364 bytes
Desc: IBEX-Command-Approval-Checklist-Rev17_0644_CEW_v01.docx
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20240326/7705c173/IBEX-Command-Approval-Checklist-Rev17_0644_CEW_v01-0001.docx>
More information about the Isocops
mailing list