[Isocops] IBEX Orbit #647 ATS Approval (May 06 - 15, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Thu Apr 25 14:36:53 EDT 2024
Hi all,
I have looked at the orbit 0647 ATS file, IBEX_2024_126_o0647a_v001.scr and I approve.
The constraint violations in IBEX_2024_126_o0647a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_126_o0647a_v001.scr match those in the STF, IBEX_2024_126_o0647a_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_126_o0647a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-05-14 19:58:14 and lasts for 6.1 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit647_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 Inertial maneuver at perigee of orbit 0646 left us pointing in safe directions for the orbit 0647 arc A ascending and descending sequences:
ibex_rotate -o -u 0.728395,0.632159,0.264227 -w ibex-sun -t 2024/05:06:08:57:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.728395,+0.632159,+0.264227
which is R.A. +40.954 Decl. +15.321
missing R.A. +43.499 Decl. +16.594 (ibex-sun)
error is R.A. +2.545 Decl. +1.273
for a total 2.758 deg
ibex_rotate -o -u 0.728395,0.632159,0.264227 -w ibex-sun -t 2024/05:09:23:13:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.728395,+0.632159,+0.264227
which is R.A. +40.954 Decl. +15.321
missing R.A. +47.026 Decl. +17.613 (ibex-sun)
error is R.A. +6.072 Decl. +2.292
for a total 6.257 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 0.674372,0.681305,0.284685 -w ibex-sun -t 2024/05:10:00:56:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.674372,+0.681305,+0.284685
which is R.A. +45.293 Decl. +16.540
missing R.A. +47.097 Decl. +17.632 (ibex-sun)
error is R.A. +1.804 Decl. +1.092
for a total 2.041 deg
ibex_rotate -o -u 0.674372,0.681305,0.284685 -w ibex-sun -t 2024/05:10:02:31:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.674372,+0.681305,+0.284685
which is R.A. +45.293 Decl. +16.540
missing R.A. +47.162 Decl. +17.651 (ibex-sun)
error is R.A. +1.869 Decl. +1.111
for a total 2.104 deg
ibex_rotate -o -u 0.674372,0.681305,0.284685 -w ibex-sun -t 2024/05:14:12:13:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.674372,+0.681305,+0.284685
which is R.A. +45.293 Decl. +16.540
missing R.A. +51.507 Decl. +18.761 (ibex-sun)
error is R.A. +6.214 Decl. +2.221
for a total 6.324 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0648 apogee:
ibex_rotate -o -u 0.614591,0.727296,0.305479 -w ibex-sun -t 2024/05:14:14:24:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.614591,+0.727296,+0.305479
which is R.A. +49.801 Decl. +17.787
missing R.A. +51.593 Decl. +18.778 (ibex-sun)
error is R.A. +1.792 Decl. +0.991
for a total 1.969 deg
ibex_rotate -o -u 0.614591,0.727296,0.305479 -w ibex-sun -t 2024-05-19T12:12:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.614591,+0.727296,+0.305479
which is R.A. +49.801 Decl. +17.787
missing R.A. +56.437 Decl. +19.881 (ibex-sun)
error is R.A. +6.636 Decl. +2.094
for a total 6.620 deg
There is no overlap with orbit 0646 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492
From: NIgel Angold <nangold at princeton.edu>
Date: Thursday, April 25, 2024 at 13:09
To: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Cc: 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>, 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: Re: [Isocops] IBEX Orbit #647 ATS Approval (May 06 - 15, 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.
I approve IBEX_2023_126_o0647a_v001.scr
Nigel
Perry, Timothy E [US] (SP)<mailto:Timothy.Perry at ngc.com>
April 23, 2024 at 13:19
All,
Attached are the planning files for Orbit #647. Please respond to this thread with comments and approvals. Approvals for the Orbit 647 ATS are required by COB, 25 April 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/05/15 01:00:00
Eclipse Flag False: 2024/05/15 02:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_126_o0647a_v001.ccvr
# Input files: 1
# IBEX_2024_126_o0647a_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 2024/05/06 07:36:35 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/05/10 02:01:40 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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