Hi all,
I have looked at the orbit 0581 ATS file, IBEX_2022_255_o0581a_v001.scr and I approve.
The constraint violations in IBEX_2022_255_o0581a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and contacts being close together on 2022-09-21. The violations are acceptable.
The PL commands in IBEX_2022_255_o0581a_v001.scr match those in the STF, IBEX_2022_255_o0581a_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_255_o0581a_v001.oef and as verified with ibex_orbit.
There are no star tracker outages this orbit.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit581_Contacts.txt for all contacts (4).
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 Sun maneuver at perigee of orbit 0580 left us pointing in safe directions for the orbit 0581 arc A ascending and descending sequences:
ibex_rotate -o -r +170.204 -d +4.219 -w ibex-sun -t 2022/09:12:19:25:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.982749,+0.169680,+0.073569
which is R.A. +170.204 Decl. +4.219
missing R.A. +170.562 Decl. +4.049 (ibex-sun)
error is R.A. +0.358 Decl. +0.170
for a total 0.395 deg
ibex_rotate -o -r +170.204 -d +4.219 -w ibex-sun -t 2022/09:16:17:33:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.982749,+0.169680,+0.073569
which is R.A. +170.204 Decl. +4.219
missing R.A. +173.965 Decl. +2.616 (ibex-sun)
error is R.A. +3.761 Decl. +1.603
for a total 4.082 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 -0.989232,0.137936,0.048919 -w ibex-sun -t 2022/09:16:19:16:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.989232,+0.137936,+0.048919
which is R.A. +172.062 Decl. +2.804
missing R.A. +174.029 Decl. +2.590 (ibex-sun)
error is R.A. +1.967 Decl. +0.214
for a total 1.976 deg
ibex_rotate -o -u -0.989232,0.137936,0.048919 -w ibex-sun -t 2022/09:16:20:52:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.989232,+0.137936,+0.048919
which is R.A. +172.062 Decl. +2.804
missing R.A. +174.088 Decl. +2.565 (ibex-sun)
error is R.A. +2.026 Decl. +0.239
for a total 2.037 deg
ibex_rotate -o -u -0.989232,0.137936,0.048919 -w ibex-sun -t 2022/09:21:14:14:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.989232,+0.137936,+0.048919
which is R.A. +172.062 Decl. +2.804
missing R.A. +178.440 Decl. +0.687 (ibex-sun)
error is R.A. +6.378 Decl. +2.117
for a total 6.717 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0582 apogee:
ibex_rotate -o -u -0.997725,0.06487,0.018325 -w ibex-sun -t 2022/09:21:19:19:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.997725,+0.064870,+0.018325
which is R.A. +176.280 Decl. +1.050
missing R.A. +178.634 Decl. +0.593 (ibex-sun)
error is R.A. +2.354 Decl. +0.457
for a total 2.398 deg
ibex_rotate -o -u -0.997725,0.06487,0.018325 -w ibex-sun -t 2022-09-26T13:11:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.997725,+0.064870,+0.018325
which is R.A. +176.280 Decl. +1.050
missing R.A. +182.782 Decl. -1.192 (ibex-sun)
error is R.A. +6.502 Decl. +2.242
for a total 6.878 deg
There is no overlap with orbit 0580 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: Wednesday, 2022-August-31 at 10:59
To: Carol Weaver <carol.weaver@unh.edu>, David Heirtzler <David.Heirtzler@unh.edu>, IBEX FDG Group <ADS-IBEX@l3harris.com>, IBEXOPS <IBEXOPS@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting <angoldconsulting@earthlink.net>, Paul
Janzen <Paul.Janzen@mso.umt.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <fair-play@comcast.net>, Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, 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 #581 ATS Approval (12 - 21 Sept 2022)
CAUTION: This email originated from outside of the University System. Do not click links
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All,
Attached are the planning files for Orbit #581. Please respond to this thread with comments and approvals.
Approvals are required by 2000, 2 Sept 2022
Please note the following:
1.
Battery Balancing this orbit
Begin
2022/09/21 21:00:00– End 2022/09/21 22:30:00
2.
Command Load Constraint Violation Report (CCVR)
IBEX_2022_255_o0581a_v001.ccvr
# IBEX_2022_255_o0581a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-006: Planned transmission at 2022/09/21 11:58:00 UTC - 2022/09/21
13:02:00 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 2022/09/21 14:28:00 UTC - 2022/09/21
15:32:00 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 7680.000 seconds)
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/09/12 14:55:05 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/09/16 20:22:01 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.