Hi all,
I have looked at the orbit 0603 ATS file, IBEX_2023_090_o0603a_v001.scr and I approve.
The constraint violations in IBEX_2023_090_o0603a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_090_o0603a_v001.scr match those in the STF, IBEX_2023_090_o0603a_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_090_o0603a_v001.oef and as verified
with ibex_orbit.
There are 2 star tracker outages this orbit. The first lasts about ~34 hours and ends ~9.6 hours before 15 Re descending. The second lasts about ~8.2 hours overlapping the perigee maneuver window and ends
~1 hour before the inertial perigee maneuver.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit603_Contacts.txt for all contacts (2).
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 0602 left us pointing in safe directions for the orbit 0603 arc A ascending and descending sequences:
ibex_rotate -o -u 0.990755,0.12778,0.045572 -w ibex-sun -t 2023/03:31:19:09:24
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.990755,+0.127780,+0.045572
which is R.A. +7.349 Decl. +2.612
missing R.A. +9.621 Decl. +4.123 (ibex-sun)
error is R.A. +2.272 Decl. +1.511
for a total 2.726 deg
ibex_rotate -o -u 0.990755,0.12778,0.045572 -w ibex-sun -t 2023/04:04:10:24:38
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.990755,+0.127780,+0.045572
which is R.A. +7.349 Decl. +2.612
missing R.A. +13.025 Decl. +5.587 (ibex-sun)
error is R.A. +5.676 Decl. +2.975
for a total 6.395 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 0.977329,0.198005,0.074979 -w ibex-sun -t 2023/04:04:12:07:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.977329,+0.198005,+0.074979
which is R.A. +11.453 Decl. +4.300
missing R.A. +13.091 Decl. +5.616 (ibex-sun)
error is R.A. +1.638 Decl. +1.316
for a total 2.096 deg
ibex_rotate -o -u 0.977329,0.198005,0.074979 -w ibex-sun -t 2023/04:04:13:42:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.977329,+0.198005,+0.074979
which is R.A. +11.453 Decl. +4.300
missing R.A. +13.152 Decl. +5.642 (ibex-sun)
error is R.A. +1.699 Decl. +1.342
for a total 2.160 deg
ibex_rotate -o -u 0.977329,0.198005,0.074979 -w ibex-sun -t 2023/04:08:23:46:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.977329,+0.198005,+0.074979
which is R.A. +11.453 Decl. +4.300
missing R.A. +17.122 Decl. +7.290 (ibex-sun)
error is R.A. +5.669 Decl. +2.990
for a total 6.383 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0604 apogee:
ibex_rotate -o -u 0.957653,0.267634,0.106177 -w ibex-sun -t 2023/04:09:07:17:38
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.957653,+0.267634,+0.106177
which is R.A. +15.614 Decl. +6.095
missing R.A. +17.394 Decl. +7.386 (ibex-sun)
error is R.A. +1.780 Decl. +1.291
for a total 2.189 deg
ibex_rotate -o -u 0.957653,0.267634,0.106177 -w ibex-sun -t 2023-04-14T00:02:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.957653,+0.267634,+0.106177
which is R.A. +15.614 Decl. +6.095
missing R.A. +21.791 Decl. +9.155 (ibex-sun)
error is R.A. +6.177 Decl. +3.060
for a total 6.844 deg
There is an overlap with orbit 0602 contact commands on 2023-03-31. This is accepetable.
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: Thursday, March 16, 2023 at 13:00
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 #603 ATS Approval (31 Mar – 09 Apr 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 #603.
Please respond to this thread with comments and approvals.
Approvals are required by COB, 20 Mar 2023
Please note the following:
1.
Battery Balancing this orbit
Begin
2023/04/09 10:00:00– End 2023/04/09 11:30:00
2.
Command Load Constraint Violation Report (CCVR)
IBEX_2023_090_o0603a_v001.ccvr
# Input files:
1
#
IBEX_2023_090_o0603a_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 2023/03/31 16:55:45 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/04/04 13:12:52 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.