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@ngc.com>
Date: Monday, February 20, 2023 at 15:43
To: Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, IBEX FDG Group <ADS-IBEX@l3harris.com>, IBEXOPS <IBEXOPS@gmail.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <fair-play@comcast.net>,
Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting <angoldconsulting@earthlink.net>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, Tyler, Ryan
S [US] (SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@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
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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.