[Isocops] IBEX Orbit #619 ATS Approval ( 25 Aug – Sept 03, 2023)
Carol Weaver
Carol.Weaver at unh.edu
Fri Aug 11 12:10:06 EDT 2023
Hi all,
I have looked at the orbit 0619 ATS file, IBEX_2023_237_o0619a_v001.scr and I approve.
The constraint violations in IBEX_2023_237_o0619a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_237_o0619a_v001.scr match those in the STF, IBEX_2023_237_o0619a_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_2023_237_o0619a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2023-08-26 20:01:07 and lasts for 37.4 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit619_Contacts.txt for all contacts (2).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0618 left us pointing in safe directions for the orbit 0619 arc A ascending and descending sequences:
ibex_rotate -o -u -0.857524,0.47551,0.196323 -w ibex-sun -t 2023/08:25:15:47:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.857524,+0.475510,+0.196323
which is R.A. +150.991 Decl. +11.322
missing R.A. +153.879 Decl. +10.784 (ibex-sun)
error is R.A. +2.888 Decl. +0.538
for a total 2.885 deg
ibex_rotate -o -u -0.857524,0.47551,0.196323 -w ibex-sun -t 2023/08:29:03:43:00
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.857524,+0.475510,+0.196323
which is R.A. +150.991 Decl. +11.322
missing R.A. +156.977 Decl. +9.633 (ibex-sun)
error is R.A. +5.986 Decl. +1.690
for a total 6.124 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 -0.893609,0.415653,0.169401 -w ibex-sun -t 2023/08:29:05:26:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.893608,+0.415653,+0.169401
which is R.A. +155.055 Decl. +9.753
missing R.A. +157.042 Decl. +9.608 (ibex-sun)
error is R.A. +1.987 Decl. +0.145
for a total 1.964 deg
ibex_rotate -o -u -0.893609,0.415653,0.169401 -w ibex-sun -t 2023/08:29:07:01:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.893608,+0.415653,+0.169401
which is R.A. +155.055 Decl. +9.753
missing R.A. +157.103 Decl. +9.586 (ibex-sun)
error is R.A. +2.048 Decl. +0.167
for a total 2.025 deg
ibex_rotate -o -u -0.893609,0.415653,0.169401 -w ibex-sun -t 2023/09:02:14:27:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.893608,+0.415653,+0.169401
which is R.A. +155.055 Decl. +9.753
missing R.A. +161.129 Decl. +7.999 (ibex-sun)
error is R.A. +6.074 Decl. +1.754
for a total 6.252 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0620 apogee:
ibex_rotate -o -u -0.924578,0.353044,0.143234 -w ibex-sun -t 2023/09:02:17:04:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.924578,+0.353044,+0.143234
which is R.A. +159.101 Decl. +8.235
missing R.A. +161.232 Decl. +7.953 (ibex-sun)
error is R.A. +2.131 Decl. +0.282
for a total 2.129 deg
ibex_rotate -o -u -0.924578,0.353044,0.143234 -w ibex-sun -t 2023-09-07T14:35:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.924578,+0.353044,+0.143234
which is R.A. +159.101 Decl. +8.235
missing R.A. +165.538 Decl. +6.196 (ibex-sun)
error is R.A. +6.437 Decl. +2.039
for a total 6.703 deg
There is no overlap with orbit 0618 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: Thursday, August 10, 2023 at 17:58
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 <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 #619 ATS Approval ( 25 Aug – Sept 03, 2023)
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 #619. Please respond to this thread with comments and approvals. Approvals are required by 15 Aug 2023 @20:00 GMT
Please note the following:
1. No Battery Balancing this Orbit.
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_237_o0619a_v001.ccvr
# Input files: 1
# IBEX_2023_237_o0619a_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 2023/08/25 13:55:22 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/08/29 06:31:14 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
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