[Isocops] IBEX Orbit #610 ATS Approval (04 – 13 June 2023)
Carol Weaver
Carol.Weaver at unh.edu
Wed May 24 11:54:47 EDT 2023
Hi all,
I have looked at the orbit 0610 ATS file, IBEX_2023_154_o0610a_v001.scr and I approve.
The constraint violations in IBEX_2023_154_o0610a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_154_o0610a_v001.scr match those in the STF, IBEX_2023_154_o0610a_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_154_o0610a_v001.oef and as verified with ibex_orbit.
There are 2 star tracker outages this orbit. The first overlaps with Orbit 0609 and ends 22 mins after 16 Re ascending. The second lasts for 7.2 hours and starts ~6 hours after the perigee maneuver.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit610_Contacts.txt for all contacts (4).
No Battery Balancing this orbit.
The Sun maneuver at perigee of orbit 0609 left us pointing in safe directions for the orbit 0610 arc A ascending and descending sequences:
ibex_rotate -o -r +71.036 -d +22.303 -w ibex-sun -t 2023/06:04:10:26:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.300663,+0.874973,+0.379505
which is R.A. +71.036 Decl. +22.303
missing R.A. +71.811 Decl. +22.363 (ibex-sun)
error is R.A. +0.775 Decl. +0.060
for a total 0.720 deg
ibex_rotate -o -r +71.036 -d +22.303 -w ibex-sun -t 2023/06:08:02:06:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.300663,+0.874973,+0.379505
which is R.A. +71.036 Decl. +22.303
missing R.A. +75.569 Decl. +22.782 (ibex-sun)
error is R.A. +4.533 Decl. +0.479
for a total 4.214 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 0.261186,0.889554,0.374801 -w ibex-sun -t 2023/06:08:03:50:00
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.261186,+0.889554,+0.374801
which is R.A. +73.637 Decl. +22.012
missing R.A. +75.644 Decl. +22.790 (ibex-sun)
error is R.A. +2.007 Decl. +0.778
for a total 2.012 deg
ibex_rotate -o -u 0.261186,0.889554,0.374801 -w ibex-sun -t 2023/06:08:05:25:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.261186,+0.889554,+0.374801
which is R.A. +73.637 Decl. +22.012
missing R.A. +75.714 Decl. +22.797 (ibex-sun)
error is R.A. +2.077 Decl. +0.785
for a total 2.074 deg
ibex_rotate -o -u 0.261186,0.889554,0.374801 -w ibex-sun -t 2023/06:12:16:45:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.261186,+0.889554,+0.374801
which is R.A. +73.637 Decl. +22.012
missing R.A. +80.409 Decl. +23.159 (ibex-sun)
error is R.A. +6.772 Decl. +1.147
for a total 6.357 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0611 apogee:
ibex_rotate -o -u 0.185086,0.905198,0.382571 -w ibex-sun -t 2023/06:12:19:28:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.185086,+0.905198,+0.382571
which is R.A. +78.444 Decl. +22.493
missing R.A. +80.522 Decl. +23.162 (ibex-sun)
error is R.A. +2.078 Decl. +0.669
for a total 2.029 deg
ibex_rotate -o -u 0.185086,0.905198,0.382571 -w ibex-sun -t 2023-06-17T20:07:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.185086,+0.905198,+0.382571
which is R.A. +78.444 Decl. +22.493
missing R.A. +85.674 Decl. +23.393 (ibex-sun)
error is R.A. +7.230 Decl. +0.900
for a total 6.718 deg
There is no overlap with orbit 0609 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, May 22, 2023 at 12:26
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>, fair-play at comcast.net <fair-play at comcast.net>, 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 #610 ATS Approval (04 – 13 June 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 #610. Please respond to this thread with comments and approvals. Approvals are required by 1600, 25 May 2023
Please note the following:
1. No Battery Balancing this Orbit.
2. Command Load Constraint Violation Report (CCVR)
# Input files: 1
# IBEX_2023_154_o0610a_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 2023/06/04 08:32:57 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/06/08 04:55:06 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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