[Isocops] IBEX Orbit #649 ATS Approval (May 24 – June 02, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Mon May 13 13:19:34 EDT 2024
Hi all,
I have looked at the orbit 0649 ATS file, IBEX_2024_144_o0649a_v001.scr and I approve.
The constraint violations in IBEX_2024_144_o0649a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_144_o0649a_v001.scr match those in the STF, IBEX_2024_144_o0649a_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_144_o0649a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-06-01 18:04:24 and lasts for 5.1 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit649_Contacts.txt for all contacts (3).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0648 left us pointing in safe directions for the orbit 0649 arc A ascending and descending sequences:
ibex_rotate -o -u 0.489499,0.803598,0.338557 -w ibex-sun -t 2024/05:24:11:12:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.489499,+0.803598,+0.338557
which is R.A. +58.653 Decl. +19.789
missing R.A. +61.385 Decl. +20.815 (ibex-sun)
error is R.A. +2.732 Decl. +1.026
for a total 2.760 deg
ibex_rotate -o -u 0.489499,0.803598,0.338557 -w ibex-sun -t 2024/05:27:22:14:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.489499,+0.803598,+0.338557
which is R.A. +58.653 Decl. +19.789
missing R.A. +64.893 Decl. +21.447 (ibex-sun)
error is R.A. +6.240 Decl. +1.658
for a total 6.071 deg
[carolweav at ena v01]$
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 0.424546,0.83455,0.351123 -w ibex-sun -t 2024/05:27:23:57:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.424546,+0.834550,+0.351123
which is R.A. +63.037 Decl. +20.556
missing R.A. +64.967 Decl. +21.460 (ibex-sun)
error is R.A. +1.930 Decl. +0.904
for a total 2.016 deg
ibex_rotate -o -u 0.424546,0.83455,0.351123 -w ibex-sun -t 2024/05:28:01:33:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.424546,+0.834550,+0.351123
which is R.A. +63.037 Decl. +20.556
missing R.A. +65.035 Decl. +21.471 (ibex-sun)
error is R.A. +1.998 Decl. +0.915
for a total 2.078 deg
ibex_rotate -o -u 0.424546,0.83455,0.351123 -w ibex-sun -t 2024/06:01:08:22:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.424546,+0.834550,+0.351123
which is R.A. +63.037 Decl. +20.556
missing R.A. +69.464 Decl. +22.113 (ibex-sun)
error is R.A. +6.427 Decl. +1.557
for a total 6.185 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0650 apogee:
ibex_rotate -o -u 0.355024,0.861268,0.36356 -w ibex-sun -t 2024/06:01:10:24:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.355024,+0.861268,+0.363560
which is R.A. +67.598 Decl. +21.319
missing R.A. +69.549 Decl. +22.121 (ibex-sun)
error is R.A. +1.951 Decl. +0.802
for a total 1.982 deg
ibex_rotate -o -u 0.355024,0.861268,0.36356 -w ibex-sun -t 2024-06-06T09:02:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.355024,+0.861268,+0.363560
which is R.A. +67.598 Decl. +21.319
missing R.A. +74.566 Decl. +22.700 (ibex-sun)
error is R.A. +6.968 Decl. +1.381
for a total 6.605 deg
There is no overlap with orbit 0648 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: Friday, May 10, 2024 at 13:16
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 #649 ATS Approval (May 24 – June 02, 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 #649. Please respond to this thread with comments and approvals. Approvals for the Orbit 649 ATS are required by COB, 13 May 2024.
Please note the following:
No Battery Balancing
Command Load Constraint Violation Report (CCVR)
IBEX_2024_144_o0649a_v001.ccvr
# Input files: 1
# IBEX_2024_144_o0649a_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 2024/05/24 09:54:46 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/05/28 01:03:01 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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