[Isocops] IBEX Orbit #564 ATS Approval (12 – 21 Apr 2022)
Carol Weaver
Carol.Weaver at unh.edu
Wed Mar 30 12:20:56 EDT 2022
(Changing email subject to Orbit 564 instead of 563)
Hi all,
I have looked at the orbit 0564 ATS file, IBEX_2022_102_o0564a_v001.scr and I approve.
The constraint violations in IBEX_2022_102_o0564a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2022_102_o0564a_v001.scr match those in the STF, IBEX_2022_102_o0564a_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_102_o0564a_v001.oef and as verified with ibex_orbit.
There are 2 star tracker outages this orbit. The first begins about 2 days after apogee and lasts for about ~27 hours. The second is ~8 hours and ends ~1 hour before the perigee maneuver.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit564_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 0563 left us pointing in safe directions for the orbit 0564 arc A ascending and descending sequences:
ibex_rotate -o -u 0.941418,0.312894,0.125818 -w ibex-sun -t 2022/04:12:14:05:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.941418,+0.312894,+0.125818
which is R.A. +18.385 Decl. +7.228
missing R.A. +20.641 Decl. +8.669 (ibex-sun)
error is R.A. +2.256 Decl. +1.441
for a total 2.659 deg
ibex_rotate -o -u 0.941418,0.312894,0.125818 -w ibex-sun -t 2022/04:16:06:03:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.941418,+0.312894,+0.125818
which is R.A. +18.385 Decl. +7.228
missing R.A. +24.117 Decl. +10.048 (ibex-sun)
error is R.A. +5.732 Decl. +2.820
for a total 6.329 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 0.91293,0.378316,0.153089 -w ibex-sun -t 2022/04:16:07:46:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.912930,+0.378316,+0.153089
which is R.A. +22.509 Decl. +8.806
missing R.A. +24.184 Decl. +10.075 (ibex-sun)
error is R.A. +1.675 Decl. +1.269
for a total 2.083 deg
ibex_rotate -o -u 0.91293,0.378316,0.153089 -w ibex-sun -t 2022/04:16:09:22:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.912930,+0.378316,+0.153089
which is R.A. +22.509 Decl. +8.806
missing R.A. +24.246 Decl. +10.100 (ibex-sun)
error is R.A. +1.737 Decl. +1.294
for a total 2.147 deg
ibex_rotate -o -u 0.91293,0.378316,0.153089 -w ibex-sun -t 2022/04:20:18:29:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.912930,+0.378316,+0.153089
which is R.A. +22.509 Decl. +8.806
missing R.A. +28.247 Decl. +11.610 (ibex-sun)
error is R.A. +5.738 Decl. +2.805
for a total 6.305 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0565 apogee:
ibex_rotate -o -u 0.878648,0.441587,0.181601 -w ibex-sun -t 2022/04:21:01:41:20
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.878648,+0.441587,+0.181601
which is R.A. +26.683 Decl. +10.463
missing R.A. +28.513 Decl. +11.694 (ibex-sun)
error is R.A. +1.830 Decl. +1.231
for a total 2.177 deg
ibex_rotate -o -u 0.878648,0.441587,0.181601 -w ibex-sun -t 2022-04-25T16:17:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.878648,+0.441587,+0.181601
which is R.A. +26.683 Decl. +10.463
missing R.A. +32.914 Decl. +13.265 (ibex-sun)
error is R.A. +6.231 Decl. +2.802
for a total 6.710 deg
There is no overlap with orbit 0563 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: Tuesday, 2022-March-29 at 14:19
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 #563 ATS Approval (12 – 21 Apr 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 #564. Please respond to this thread with comments and approvals.
Approvals are required by COB, 01 April 2022
Please note the following:
1. Battery Balancing this orbit
Begin 2022/04/21 04:00:00– End 2022/04/21 05:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2022_102_o0564a_v001.ccvr
# Input files: 1
# IBEX_2022_102_o0564a_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 2022/04/12 11:10:38 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/04/16 08:52:04 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
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