[Isocops] IBEX Orbit #615 ATS Approval (20 - 29 July 2023)
Carol Weaver
Carol.Weaver at unh.edu
Thu Jul 6 08:12:00 EDT 2023
Hi all,
I have looked at the orbit 0615 ATS file, IBEX_2023_201_o0615a_v001.scr and I approve.
The constraint violations in IBEX_2023_201_o0615a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_201_o0615a_v001.scr match those in the STF, IBEX_2023_201_o0615a_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_201_o0615a_v001.oef and as verified with ibex_orbit.
There are no star tracker outages this orbit.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit615_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 0614 left us pointing in safe directions for the orbit 0615 arc A ascending and descending sequences:
ibex_rotate -o -u -0.414354,0.838566,0.35372 -w ibex-sun -t 2023/07:20:12:09:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.414354,+0.838566,+0.353720
which is R.A. +116.295 Decl. +20.715
missing R.A. +119.267 Decl. +20.695 (ibex-sun)
error is R.A. +2.972 Decl. +0.020
for a total 2.780 deg
ibex_rotate -o -u -0.414354,0.838566,0.35372 -w ibex-sun -t 2023/07:24:02:42:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.414354,+0.838566,+0.353720
which is R.A. +116.295 Decl. +20.715
missing R.A. +122.782 Decl. +20.036 (ibex-sun)
error is R.A. +6.487 Decl. +0.679
for a total 6.118 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 -0.481089,0.80822,0.339608 -w ibex-sun -t 2023/07:24:04:25:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.481089,+0.808220,+0.339608
which is R.A. +120.763 Decl. +19.853
missing R.A. +122.853 Decl. +20.022 (ibex-sun)
error is R.A. +2.090 Decl. +0.169
for a total 1.972 deg
ibex_rotate -o -u -0.481089,0.80822,0.339608 -w ibex-sun -t 2023/07:24:06:01:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.481089,+0.808220,+0.339608
which is R.A. +120.763 Decl. +19.853
missing R.A. +122.920 Decl. +20.009 (ibex-sun)
error is R.A. +2.157 Decl. +0.156
for a total 2.034 deg
ibex_rotate -o -u -0.481089,0.80822,0.339608 -w ibex-sun -t 2023/07:28:15:43:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.481089,+0.808220,+0.339608
which is R.A. +120.763 Decl. +19.853
missing R.A. +127.392 Decl. +19.020 (ibex-sun)
error is R.A. +6.629 Decl. +0.833
for a total 6.306 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0616 apogee:
ibex_rotate -o -u -0.546425,0.771944,0.324842 -w ibex-sun -t 2023/07:28:18:22:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.546425,+0.771944,+0.324842
which is R.A. +125.293 Decl. +18.956
missing R.A. +127.500 Decl. +18.990 (ibex-sun)
error is R.A. +2.207 Decl. +0.034
for a total 2.087 deg
ibex_rotate -o -u -0.546425,0.771944,0.324842 -w ibex-sun -t 2023-08-02T14:32:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.546425,+0.771944,+0.324842
which is R.A. +125.293 Decl. +18.956
missing R.A. +132.087 Decl. +17.850 (ibex-sun)
error is R.A. +6.794 Decl. +1.106
for a total 6.540 deg
There is no overlap with orbit 0614 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: Wednesday, July 5, 2023 at 14:29
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 #615 ATS Approval (20 - 29 July 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 #615. Please respond to this thread with comments and approvals. Approvals are required by COB, 09 July 2023
Please note the following:
1. Battery Balancing this Orbit.
Begin 2023/07/29 02:00:00– End 2023/07/29 03:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_201_o0615a_v001.ccvr
# Input files: 1
# IBEX_2023_201_o0615a_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 2023/07/20 10:09:22 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/07/24 05:31:04 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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