[Isocops] IBEX Orbit #558 ATS Approval (16 Feb 2022 - 25 Feb 2022)
Carol Weaver
Carol.Weaver at unh.edu
Fri Feb 4 12:22:59 EST 2022
Hi all,
The angle at descending after the apogee sun maneuver is 4.157 deg
I have looked at the orbit 0558 ATS file, IBEX_2022_047_o0558a_v001.scr and I approve.
The constraint violations in IBEX_2022_047_o0558a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2022_047_o0558a_v001.scr match those in the STF, IBEX_2022_047_o0558a_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_047_o0558a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outages this orbit. Starting at the perigee of orbit 557 and lasting about 7 days through the apogee of 558.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit558_Contacts.txt for all contacts (4).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, and more than 1 hour away from maneuver.
The Sun maneuver at perigee of orbit 0557 left us pointing in safe directions for the orbit 0558 arc A ascending and descending sequences:
ibex_rotate -o -r +329.096 -d -12.546 -w ibex-sun -t 2022/02:16:11:50:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.837541,-0.501337,-0.217223
which is R.A. +329.096 Decl. -12.546
missing R.A. +329.659 Decl. -12.369 (ibex-sun)
error is R.A. +0.563 Decl. +0.177
for a total 0.577 deg
ibex_rotate -o -r +329.096 -d -12.546 -w ibex-sun -t 2022/02:20:17:33:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.837541,-0.501337,-0.217223
which is R.A. +329.096 Decl. -12.546
missing R.A. +333.851 Decl. -10.802 (ibex-sun)
error is R.A. +4.755 Decl. +1.744
for a total 4.972 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 +333.921 -d -10.775 -w ibex-sun -t 2022/02:20:19:21:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.882353,-0.431859,-0.186953
which is R.A. +333.921 Decl. -10.775
missing R.A. +333.921 Decl. -10.775 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +333.921 -d -10.775 -w ibex-sun -t 2022/02:20:20:51:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.882353,-0.431859,-0.186953
which is R.A. +333.921 Decl. -10.775
missing R.A. +333.981 Decl. -10.751 (ibex-sun)
error is R.A. +0.060 Decl. +0.024
for a total 0.063 deg
ibex_rotate -o -r +333.921 -d -10.775 -w ibex-sun -t 2022/02:25:01:42:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.882353,-0.431859,-0.186953
which is R.A. +333.921 Decl. -10.775
missing R.A. +337.857 Decl. -9.271 (ibex-sun)
error is R.A. +3.936 Decl. +1.504
for a total 4.157 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0559 apogee:
ibex_rotate -o -u 0.92426,-0.346137,-0.161035 -w ibex-sun -t 2022/02:25:07:07:26
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. +338.074 Decl. -9.196 (ibex-sun)
error is R.A. +1.395 Decl. +0.071
for a total 1.379 deg
ibex_rotate -o -u 0.92426,-0.346137,-0.161035 -w ibex-sun -t 2022-03-01T23:00:37
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. +342.592 Decl. -7.376 (ibex-sun)
error is R.A. +3.123 Decl. +1.891
for a total 3.623 deg
There is no overlap with orbit 0557 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: Thursday, 2022-February-3 at 15:16
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 #558 ATS Approval (16 Feb 2022 - 25 Feb 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 #558. Please respond to this thread with comments and approvals.
Approvals are required by COB, 05 Feb 2022
Please note the following:
1. Apogee Sun Maneuver – 2022/02/20 19:06:31
1. Battery Balancing this orbit
Begin 2022/02:25:09:00:00– End 2022/02:25:10:30:00
1. Command Load Constraint Violation Report (CCVR)
IBEX_2022_047_o0558a_v001.ccvr
# Input files: 1
# IBEX_2022_047_o0558a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
These 2 IBX-CLC-006 Soft constraint violations are acceptable. The 2 perigee contacts have only 2 hours of separation and the MPS limit is set for a 5 hour minimum separation.
IBX-CLC-006: Planned transmission at 2022/02/25 06:58:00 UTC - 2022/02/25
08:02:00 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 2022/02/25 10:58:00 UTC - 2022/02/25
12:02:00 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 2022/02/16 05:31:20 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/02/20 20:21:37 UTC
==============
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 01D8190E.CD983310]
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