[Isocops] IBEX Orbit #608 ATS Approval (16 - 26 May 2023)
Carol Weaver
Carol.Weaver at unh.edu
Thu May 4 15:29:24 EDT 2023
Hi all,
I have looked at the orbit 0608 ATS file, IBEX_2023_136_o0608a_v001.scr and I approve.
The constraint violations in IBEX_2023_136_o0608a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_136_o0608a_v001.scr match those in the STF, IBEX_2023_136_o0608a_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_136_o0608a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. It lastsfor ~8.3 hours and begins ~3 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_Orbit608_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 0607 left us pointing in safe directions for the orbit 0608 arc A ascending and descending sequences:
ibex_rotate -o -u 0.606895,0.732751,0.307822 -w ibex-sun -t 2023/05:16:18:36:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.606895,+0.732751,+0.307822
which is R.A. +50.367 Decl. +17.928
missing R.A. +52.955 Decl. +19.065 (ibex-sun)
error is R.A. +2.588 Decl. +1.137
for a total 2.705 deg
ibex_rotate -o -u 0.606895,0.732751,0.307822 -w ibex-sun -t 2023/05:20:13:20:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.606895,+0.732751,+0.307822
which is R.A. +50.367 Decl. +17.928
missing R.A. +56.747 Decl. +19.935 (ibex-sun)
error is R.A. +6.380 Decl. +2.007
for a total 6.359 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 0.543318,0.774155,0.324792 -w ibex-sun -t 2023/05:20:15:03:24
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.543318,+0.774155,+0.324792
which is R.A. +54.938 Decl. +18.953
missing R.A. +56.820 Decl. +19.951 (ibex-sun)
error is R.A. +1.882 Decl. +0.998
for a total 2.036 deg
ibex_rotate -o -u 0.543318,0.774155,0.324792 -w ibex-sun -t 2023/05:20:16:38:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.543318,+0.774155,+0.324792
which is R.A. +54.938 Decl. +18.953
missing R.A. +56.887 Decl. +19.966 (ibex-sun)
error is R.A. +1.949 Decl. +1.013
for a total 2.098 deg
ibex_rotate -o -u 0.543318,0.774155,0.324792 -w ibex-sun -t 2023/05:25:06:54:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.543318,+0.774155,+0.324792
which is R.A. +54.938 Decl. +18.953
missing R.A. +61.528 Decl. +20.876 (ibex-sun)
error is R.A. +6.590 Decl. +1.923
for a total 6.487 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0609 apogee:
ibex_rotate -o -u 0.474042,0.811388,0.341955 -w ibex-sun -t 2023/05:25:09:39:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.474042,+0.811388,+0.341955
which is R.A. +59.705 Decl. +19.996
missing R.A. +61.638 Decl. +20.891 (ibex-sun)
error is R.A. +1.933 Decl. +0.895
for a total 2.020 deg
ibex_rotate -o -u 0.474042,0.811388,0.341955 -w ibex-sun -t 2023-05-30T08:52:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.474042,+0.811388,+0.341955
which is R.A. +59.705 Decl. +19.996
missing R.A. +66.649 Decl. +21.717 (ibex-sun)
error is R.A. +6.944 Decl. +1.721
for a total 6.712 deg
There is no overlap with orbit 0607 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: Wednesday, May 3, 2023 at 15:18
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>, angoldconsulting <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 #608 ATS Approval (16 - 26 May 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 #608 Please respond to this thread with comments and approvals.
Approvals are required by COB, 05 May 2023
Please note the following:
1. Battery Balancing this orbit
Begin 2023/05/25 20:00:00– End 2023/05/25 21:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_136_o0608a_v001.ccvr
# Input files: 1
# IBEX_2023_136_o0608a_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 2023/05/16 16:36:01 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/05/20 16:08:30 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES
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