[Isocops] IBEX Orbit #630 ATS Approval ( Dec 02 - 11, 2023)
Carol Weaver
Carol.Weaver at unh.edu
Mon Nov 20 11:46:16 EST 2023
Hi all,
The angle of decending after the apogee sun maneuver is 4.032 deg.
I have looked at the orbit 0630 ATS file, IBEX_2023_336_o0630a_v001.scr and I approve.
The constraint violations in IBEX_2023_336_o0630a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_336_o0630a_v001.scr match those in the STF, IBEX_2023_336_o0630a_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_336_o0630a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2023-12-04 04:05:48 and lasts for 115.2 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit630_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 0629 left us pointing in safe directions for the orbit 0630 arc A ascending and descending sequences:
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023/12:02:17:00:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.362113,-0.851554,-0.379117
which is R.A. +246.963 Decl. -22.279
missing R.A. +248.305 Decl. -21.959 (ibex-sun)
error is R.A. +1.342 Decl. +0.320
for a total 1.283 deg
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023/12:06:16:28:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.362113,-0.851554,-0.379117
which is R.A. +246.963 Decl. -22.279
missing R.A. +252.619 Decl. -22.456 (ibex-sun)
error is R.A. +5.656 Decl. +0.177
for a total 5.234 deg
The Sun 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 -r +252.700 -d -22.464 -w ibex-sun -t 2023/12:06:18:16:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.274810,-0.882313,-0.382103
which is R.A. +252.700 Decl. -22.464
missing R.A. +252.700 Decl. -22.464 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +252.700 -d -22.464 -w ibex-sun -t 2023/12:06:19:46:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.274810,-0.882313,-0.382103
which is R.A. +252.700 Decl. -22.464
missing R.A. +252.767 Decl. -22.471 (ibex-sun)
error is R.A. +0.067 Decl. +0.007
for a total 0.062 deg
ibex_rotate -o -r +252.700 -d -22.464 -w ibex-sun -t 2023/12:10:18:53:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.274810,-0.882313,-0.382103
which is R.A. +252.700 Decl. -22.464
missing R.A. +257.046 Decl. -22.883 (ibex-sun)
error is R.A. +4.346 Decl. +0.419
for a total 4.032 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0631 apogee:
ibex_rotate -o -u -0.17728,-0.898951,-0.400573 -w ibex-sun -t 2023/12:10:21:08:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.177280,-0.898951,-0.400573
which is R.A. +258.844 Decl. -23.614
missing R.A. +257.153 Decl. -22.896 (ibex-sun)
error is R.A. +1.691 Decl. +0.718
for a total 1.712 deg
ibex_rotate -o -u -0.17728,-0.898951,-0.400573 -w ibex-sun -t 2023-12-15T19:25:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.177280,-0.898951,-0.400573
which is R.A. +258.844 Decl. -23.614
missing R.A. +262.665 Decl. -23.246 (ibex-sun)
error is R.A. +3.821 Decl. +0.368
for a total 3.525 deg
There is an overlap with the contact commands in Orbit 0629. This is acceptable.
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: Saturday, November 18, 2023 at 17:03
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 #630 ATS Approval ( Dec 02 - 11, 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 #630. Please respond to this thread with comments and approvals. Approvals are required by COB 26 Nov 2023.
Please note the following:
1. Battery Balancing
Eclipse Flag True: 2023/12:11:06:00:00
Eclipse Flag False: 2023/12:11:07:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_336_o0630a_v001.ccvr
# Input files: 1
# IBEX_2023_336_o0630a_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 2023/12/02 15:26:50 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/12/06 19:16:56 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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