[Isocops] IBEX Orbit #573 ATS Approval (01 – 10 July 2022)
Carol Weaver
Carol.Weaver at unh.edu
Tue Jun 21 13:43:41 EDT 2022
Hi all,
I have looked at the orbit 0573 ATS file, IBEX_2022_182_o0573a_v001.scr and I approve.
The constraint violations in IBEX_2022_182_o0573a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2022_182_o0573a_v001.scr match those in the STF, IBEX_2022_182_o0573a_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_182_o0573a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outages this orbit lasting ~6 hours beginning ~8.5 hours after the perigee maneuver.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit573_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 0572 left us pointing in safe directions for the orbit 0573 arc A ascending and descending sequences:
ibex_rotate -o -u -0.126906,0.913625,0.386244 -w ibex-sun -t 2022/07:02:04:28:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.126906,+0.913625,+0.386244
which is R.A. +97.908 Decl. +22.721
missing R.A. +100.853 Decl. +23.041 (ibex-sun)
error is R.A. +2.945 Decl. +0.320
for a total 2.732 deg
ibex_rotate -o -u -0.126906,0.913625,0.386244 -w ibex-sun -t 2022/07:05:16:32:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.126906,+0.913625,+0.386244
which is R.A. +97.908 Decl. +22.721
missing R.A. +104.432 Decl. +22.781 (ibex-sun)
error is R.A. +6.524 Decl. +0.060
for a total 6.016 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 -0.198474,0.903162,0.380667 -w ibex-sun -t 2022/07:05:18:15:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.198474,+0.903162,+0.380667
which is R.A. +102.394 Decl. +22.375
missing R.A. +104.507 Decl. +22.775 (ibex-sun)
error is R.A. +2.113 Decl. +0.400
for a total 1.991 deg
ibex_rotate -o -u -0.198474,0.903162,0.380667 -w ibex-sun -t 2022/07:05:19:51:00
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.198474,+0.903162,+0.380667
which is R.A. +102.394 Decl. +22.375
missing R.A. +104.576 Decl. +22.770 (ibex-sun)
error is R.A. +2.182 Decl. +0.395
for a total 2.053 deg
ibex_rotate -o -u -0.198474,0.903162,0.380667 -w ibex-sun -t 2022/07:10:04:03:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.198474,+0.903162,+0.380667
which is R.A. +102.394 Decl. +22.375
missing R.A. +109.124 Decl. +22.289 (ibex-sun)
error is R.A. +6.730 Decl. +0.086
for a total 6.225 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0574 apogee:
ibex_rotate -o -u -0.271668,0.886539,0.374493 -w ibex-sun -t 2022/07:10:06:55:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.271668,+0.886539,+0.374493
which is R.A. +107.037 Decl. +21.993
missing R.A. +109.242 Decl. +22.270 (ibex-sun)
error is R.A. +2.205 Decl. +0.277
for a total 2.061 deg
ibex_rotate -o -u -0.271668,0.886539,0.374493 -w ibex-sun -t 2022-07-15T01:57:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.271668,+0.886539,+0.374493
which is R.A. +107.037 Decl. +21.993
missing R.A. +114.015 Decl. +21.616 (ibex-sun)
error is R.A. +6.978 Decl. +0.377
for a total 6.489 deg
There is no overlap with orbit 0572 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: Saturday, 2022-June-18 at 09:52
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>, Nigel Angold <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 #573 ATS Approval (01 – 10 July 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 #573. Please respond to this thread with comments and approvals.
Approvals are required by COB, 21 June 2022
Please note the following:
1. No Battery Balancing this orbit
Begin 2022/07/10 14:00:00– End 2022/07/10 15:30:00
1. Command Load Constraint Violation Report (CCVR)
IBEX_2022_182_o0573a_v001.ccvr
# Input files: 1
# IBEX_2022_182_o0573a_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 2022/07/02 02:29:27 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/07/05 19:21:00 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
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