[Isocops] IBEX Orbit #559 ATS Approval (25 Feb – 06 Mar 2022)
Carol Weaver
Carol.Weaver at unh.edu
Tue Feb 15 21:25:50 EST 2022
Hi all,
I have looked at the orbit 0559 ATS file, IBEX_2022_056_o0559a_v001.scr and I approve.
The constraint violations in IBEX_2022_056_o0559a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and the two contacts on 2022-03-06 being close together. The violations are acceptable.
The PL commands in IBEX_2022_056_o0559a_v001.scr match those in the STF, IBEX_2022_056_o0559a_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_2022_056_o0559a_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_Orbit559_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long and more than 2 hours away from payload descending macros. It is ~52 minutes from the maneuver instead of 1 hour.
The Inertial maneuver at perigee of orbit 0558 left us pointing in safe directions for the orbit 0559 arc A ascending and descending sequences:
ibex_rotate -o -u .92426,-0.346137,-0.161035 -w ibex-sun -t 2022/02:25:16:45:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.924260,-0.346137,-0.161035
which is R.A. +339.469 Decl. -9.267
missing R.A. +338.472 Decl. -9.056 (ibex-sun)
error is R.A. +0.997 Decl. +0.211
for a total 1.006 deg
ibex_rotate -o -u .92426,-0.346137,-0.161035 -w ibex-sun -t 2022/03:01:11:31:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.924260,-0.346137,-0.161035
which is R.A. +339.469 Decl. -9.267
missing R.A. +342.147 Decl. -7.565 (ibex-sun)
error is R.A. +2.678 Decl. +1.702
for a total 3.149 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 0.952271,-0.2763,-0.129765 -w ibex-sun -t 2022/03:01:13:14:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.952271,-0.276300,-0.129765
which is R.A. +343.820 Decl. -7.456
missing R.A. +342.214 Decl. -7.537 (ibex-sun)
error is R.A. +1.606 Decl. +0.081
for a total 1.594 deg
ibex_rotate -o -u 0.952271,-0.2763,-0.129765 -w ibex-sun -t 2022/03:01:14:49:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.952271,-0.276300,-0.129765
which is R.A. +343.820 Decl. -7.456
missing R.A. +342.276 Decl. -7.511 (ibex-sun)
error is R.A. +1.544 Decl. +0.055
for a total 1.532 deg
ibex_rotate -o -u 0.952271,-0.2763,-0.129765 -w ibex-sun -t 2022/03:06:05:25:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.952271,-0.276300,-0.129765
which is R.A. +343.820 Decl. -7.456
missing R.A. +346.445 Decl. -5.792 (ibex-sun)
error is R.A. +2.625 Decl. +1.664
for a total 3.093 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0560 apogee:
ibex_rotate -o -u 0.973273,-0.206485,-0.100518 -w ibex-sun -t 2022/03:06:11:08:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.973273,-0.206485,-0.100518
which is R.A. +348.022 Decl. -5.769
missing R.A. +346.666 Decl. -5.710 (ibex-sun)
error is R.A. +1.356 Decl. +0.059
for a total 1.350 deg
ibex_rotate -o -u 0.973273,-0.206485,-0.100518 -w ibex-sun -t 2022-03-11T04:42:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.973273,-0.206485,-0.100518
which is R.A. +348.022 Decl. -5.769
missing R.A. +351.167 Decl. -3.795 (ibex-sun)
error is R.A. +3.145 Decl. +1.974
for a total 3.703 deg
There is no overlap with orbit 0558 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: Friday, 2022-February-11 at 10:56
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 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 #559 ATS Approval (25 Feb – 06 Mar 2022)
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 #559. Please respond to this thread with comments and approvals.
Approvals are required by COB, 15 Feb 2022
Please note the following:
1. Battery Balancing this orbit
Begin 2022/03/06 12:00:00 – End 2022/03/06 13:30:00
1. Command Load Constraint Violation Report (CCVR)
IBEX_2022_056_o0559a_v001.ccvr
# Input files: 1
# IBEX_2022_056_o0559a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
The 2 IBX-CLC-006 violations are acceptable
IBX-CLC-006: Planned transmission at 2022/03/06 09:13:00 UTC - 2022/03/06
10:17:00 UTC is followed by one or more additional transmissions
which, when combined, exceed the maximum transmission time of 5400
seconds within a 18000-second window (total planned transmission
time this window is 7680.000 seconds)
IBX-CLC-006: Planned transmission at 2022/03/06 13:58:00 UTC - 2022/03/06
15:02:00 UTC is preceded by one or more additional transmissions
which, when combined, exceed the maximum transmission time of 5400
seconds within a 18000-second window (total planned transmission
time this window is 7680.000 seconds)
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/02/25 12:05:43 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/03/01 14:19:42 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D81F34.E3DFB900]
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