[Isocops] IBEX Orbit #620 ATS Approval ( Sept 03 - 12, 2023)
Carol Weaver
Carol.Weaver at unh.edu
Wed Aug 23 11:55:58 EDT 2023
Hi all,
I have looked at the orbit 0620 ATS file, IBEX_2023_246_o0620a_v001.scr and I approve.
The constraint violations in IBEX_2023_246_o0620a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_246_o0620a_v001.scr match those in the STF, IBEX_2023_246_o0620a_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_246_o0620a_v001.oef and as verified with ibex_orbit.
No star tracker outage this orbit.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit620_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 0619 left us pointing in safe directions for the orbit 0620 arc A ascending and descending sequences:
ibex_rotate -o -u -0.924578,0.353044,0.143234 -w ibex-sun -t 2023/09:03:13:02:20
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. +161.970 Decl. +7.621 (ibex-sun)
error is R.A. +2.869 Decl. +0.614
for a total 2.907 deg
ibex_rotate -o -u -0.924578,0.353044,0.143234 -w ibex-sun -t 2023/09:07:03:02:07
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. +165.104 Decl. +6.369 (ibex-sun)
error is R.A. +6.003 Decl. +1.866
for a total 6.240 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 -0.951089,0.287223,0.113723 -w ibex-sun -t 2023/09:07:04:45:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.951089,+0.287223,+0.113723
which is R.A. +163.196 Decl. +6.530
missing R.A. +165.169 Decl. +6.343 (ibex-sun)
error is R.A. +1.973 Decl. +0.186
for a total 1.969 deg
ibex_rotate -o -u -0.951089,0.287223,0.113723 -w ibex-sun -t 2023/09:07:06:20:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.951089,+0.287223,+0.113723
which is R.A. +163.196 Decl. +6.530
missing R.A. +165.228 Decl. +6.320 (ibex-sun)
error is R.A. +2.032 Decl. +0.210
for a total 2.030 deg
ibex_rotate -o -u -0.951089,0.287223,0.113723 -w ibex-sun -t 2023/09:11:16:00:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.951089,+0.287223,+0.113723
which is R.A. +163.196 Decl. +6.530
missing R.A. +169.294 Decl. +4.622 (ibex-sun)
error is R.A. +6.098 Decl. +1.908
for a total 6.362 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0621 apogee:
ibex_rotate -o -u -0.971868,0.219519,0.085347 -w ibex-sun -t 2023/09:11:18:38:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.971868,+0.219519,+0.085347
which is R.A. +167.272 Decl. +4.896
missing R.A. +169.397 Decl. +4.574 (ibex-sun)
error is R.A. +2.125 Decl. +0.322
for a total 2.142 deg
ibex_rotate -o -u -0.971868,0.219519,0.085347 -w ibex-sun -t 2023-09-16T14:41:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.971868,+0.219519,+0.085347
which is R.A. +167.272 Decl. +4.896
missing R.A. +173.631 Decl. +2.770 (ibex-sun)
error is R.A. +6.359 Decl. +2.126
for a total 6.691 deg
There is no overlap with orbit 0619 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, August 21, 2023 at 14:09
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 #620 ATS Approval ( Sept 03 - 12, 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 #620 Please respond to this thread with comments and approvals. Approvals are required by 24 Aug 2023 @18:00 GMT
Please note the following:
1. Battery Balancing this Orbit.
Begin 2023/09/12 03:00:00– End 2023/09/12 04:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_246_o0620a_v001.ccvr
# Input files: 1
# IBEX_2023_246_o0620a_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 2023/09/03 11:11:08 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/09/07 05:50:21 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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