[Isocops] IBEX Orbit #600 ATS Approval (04 - 13 Mar 2023)
Carol Weaver
Carol.Weaver at unh.edu
Tue Feb 21 09:39:08 EST 2023
Hi all,
I have looked at the orbit 0600 ATS file, IBEX_2023_063_o0600a_v001.scr and I approve.
The constraint violations in IBEX_2023_063_o0600a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and 2 contacts being close together. The violations are acceptable.
The PL commands in IBEX_2023_063_o0600a_v001.scr match those in the STF, IBEX_2023_063_o0600a_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_063_o0600a_v001.oef and as verified with ibex_orbit.
There are 2 star tracker outages this orbit after apogee. The first outage lasts for ~42 hours and the second is ~2.4 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit600_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 0599 left us pointing in safe directions for the orbit 0600 arc A ascending and descending sequences:
ibex_rotate -o -u 0.962011,-0.246322,-0.117728 -w ibex-sun -t 2023/03:04:16:02:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.962011,-0.246322,-0.117728
which is R.A. +345.638 Decl. -6.761
missing R.A. +344.779 Decl. -6.514 (ibex-sun)
error is R.A. +0.859 Decl. +0.247
for a total 0.888 deg
ibex_rotate -o -u 0.962011,-0.246322,-0.117728 -w ibex-sun -t 2023/03:08:05:11:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.962011,-0.246322,-0.117728
which is R.A. +345.638 Decl. -6.761
missing R.A. +348.175 Decl. -5.069 (ibex-sun)
error is R.A. +2.537 Decl. +1.692
for a total 3.038 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 0.98067,-0.175691,-0.08613 -w ibex-sun -t 2023/03:08:06:55:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.980670,-0.175691,-0.086130
which is R.A. +349.843 Decl. -4.941
missing R.A. +348.241 Decl. -5.039 (ibex-sun)
error is R.A. +1.602 Decl. +0.098
for a total 1.599 deg
ibex_rotate -o -u 0.98067,-0.175691,-0.08613 -w ibex-sun -t 2023/03:08:08:30:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.980670,-0.175691,-0.086130
which is R.A. +349.843 Decl. -4.941
missing R.A. +348.302 Decl. -5.013 (ibex-sun)
error is R.A. +1.541 Decl. +0.072
for a total 1.537 deg
ibex_rotate -o -u 0.98067,-0.175691,-0.08613 -w ibex-sun -t 2023/03:12:16:58:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.980670,-0.175691,-0.086130
which is R.A. +349.843 Decl. -4.941
missing R.A. +352.204 Decl. -3.349 (ibex-sun)
error is R.A. +2.361 Decl. +1.592
for a total 2.843 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0601 apogee:
ibex_rotate -o -u 0.992667,-0.106524,-0.057146 -w ibex-sun -t 2023/03:12:19:51:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.992667,-0.106524,-0.057146
which is R.A. +353.875 Decl. -3.276
missing R.A. +352.310 Decl. -3.308 (ibex-sun)
error is R.A. +1.565 Decl. +0.032
for a total 1.562 deg
ibex_rotate -o -u 0.992667,-0.106524,-0.057146 -w ibex-sun -t 2023-03-17T15:22:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.992667,-0.106524,-0.057146
which is R.A. +353.875 Decl. -3.276
missing R.A. +356.830 Decl. -1.359 (ibex-sun)
error is R.A. +2.955 Decl. +1.917
for a total 3.520 deg
There is no overlap with orbit 0599 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, February 20, 2023 at 15:43
To: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, IBEX FDG Group <ADS-IBEX at l3harris.com>, IBEXOPS <IBEXOPS at gmail.com>, ISOC <isocops at lists.sr.unh.edu>, Ken Fairchild <fair-play at comcast.net>, Ken Fairchild (kwfairchild at gmail.com) <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting <angoldconsulting at earthlink.net>, Paul Janzen <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 #600 ATS Approval (04 - 13 Mar 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 #600. Please respond to this thread with comments and approvals.
Approvals are required by COB, 22 Feb 2023
Please note the following:
1. Battery Balancing this orbit
Begin 2023/03/13 03:00:00– End 2023/03/13 04:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_063_o0600a_v001.ccvr
# Input files: 1
# IBEX_2023_063_o0600a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-006: Planned transmission at 2023/03/13 06:58:00 UTC - 2023/03/13
08:32:00 UTC exceeds the maximum contiguous transmission time of
5400 seconds
IBX-CLC-006: Planned transmission at 2023/03/13 10:28:00 UTC - 2023/03/13
11:32:00 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 9480.000 seconds)
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/03/04 13:50:47 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/03/08 08:00:13 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
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