[Isocops] EXT :Re: IBEX Orbit #651 ATS Approval (June 10 - 20, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Fri May 31 13:46:21 EDT 2024
Hi all,
I have looked at the orbit 0651 ATS file, IBEX_2024_162_o0651a_v001.scr and I approve.
The constraint violations in IBEX_2024_162_o0651a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_162_o0651a_v001.scr match those in the STF, IBEX_2024_162_o0651a_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_2024_162_o0651a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-06-19 18:40:49 and lasts for 11.3 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit651_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 Inertial maneuver at perigee of orbit 0650 left us pointing in safe directions for the orbit 0651 arc A ascending and descending sequences:
ibex_rotate -o -u 0.210033,0.900571,0.380602 -w ibex-sun -t 2024/06:11:09:50:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.210033,+0.900571,+0.380602
which is R.A. +76.872 Decl. +22.371
missing R.A. +79.773 Decl. +23.085 (ibex-sun)
error is R.A. +2.901 Decl. +0.714
for a total 2.769 deg
ibex_rotate -o -u 0.210033,0.900571,0.380602 -w ibex-sun -t 2024/06:14:21:09:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.210033,+0.900571,+0.380602
which is R.A. +76.872 Decl. +22.371
missing R.A. +83.353 Decl. +23.312 (ibex-sun)
error is R.A. +6.481 Decl. +0.942
for a total 6.046 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 0.138202,0.912522,0.384972 -w ibex-sun -t 2024/06:14:22:52:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.138202,+0.912522,+0.384972
which is R.A. +81.388 Decl. +22.642
missing R.A. +83.428 Decl. +23.316 (ibex-sun)
error is R.A. +2.040 Decl. +0.674
for a total 1.996 deg
ibex_rotate -o -u 0.138202,0.912522,0.384972 -w ibex-sun -t 2024/06:15:00:27:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.138202,+0.912522,+0.384972
which is R.A. +81.388 Decl. +22.642
missing R.A. +83.498 Decl. +23.320 (ibex-sun)
error is R.A. +2.110 Decl. +0.678
for a total 2.057 deg
ibex_rotate -o -u 0.138202,0.912522,0.384972 -w ibex-sun -t 2024/06:19:07:12:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.138202,+0.912522,+0.384972
which is R.A. +81.388 Decl. +22.642
missing R.A. +88.037 Decl. +23.442 (ibex-sun)
error is R.A. +6.649 Decl. +0.800
for a total 6.170 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0652 apogee:
ibex_rotate -o -u 0.063567,0.919187,0.388658 -w ibex-sun -t 2024/06:19:09:15:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.063567,+0.919187,+0.388658
which is R.A. +86.044 Decl. +22.871
missing R.A. +88.125 Decl. +23.440 (ibex-sun)
error is R.A. +2.081 Decl. +0.569
for a total 1.997 deg
ibex_rotate -o -u 0.063567,0.919187,0.388658 -w ibex-sun -t 2024-06-24T05:22:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.063567,+0.919187,+0.388658
which is R.A. +86.044 Decl. +22.871
missing R.A. +93.057 Decl. +23.429 (ibex-sun)
error is R.A. +7.013 Decl. +0.558
for a total 6.472 deg
There is no overlap with orbit 0650 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492
From: Coca Gonzales, Andrea [US] (SP) <Andrea.CocaGonzales at ngc.com>
Date: Friday, May 31, 2024 at 13:06
To: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, ADS-IBEX at l3harris.com <ADS-IBEX at l3harris.com>, IBEXOPS at gmail.com <IBEXOPS at gmail.com>, isocops at lists.sr.unh.edu <isocops at lists.sr.unh.edu>, kwfairchild at gmail.com <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting at earthlink.net <angoldconsulting at earthlink.net>, Paul.Janzen at mso.umt.edu <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: RE: EXT :Re: [Isocops] IBEX Orbit #651 ATS Approval (June 10 - 20, 2024)
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.
Hello team,
My apologies. I forgot to attach the IBEX_Orbit651_Contacts.txt file to the previous email.
Best,
Andrea Coca Gonzales | Associate Engineer Satellite Systems | MEV | ICESat-2 | TESS | IBEX
Northrop Grumman Corporation | Space Systems
C: 703-582-8233 | Andrea.CocaGonzales at ngc.com<mailto:Andrea.CocaGonzales at ngc.com>
From: NIgel Angold <nangold at princeton.edu>
Sent: Thursday, May 30, 2024 9:10 PM
To: Coca Gonzales, Andrea [US] (SP) <Andrea.CocaGonzales at ngc.com>
Subject: EXT :Re: [Isocops] IBEX Orbit #651 ATS Approval (June 10 - 20, 2024)
File IBEX_Orbit651_Contacts.txt is missing from your attached files.
Thanks,
Nigel
Coca Gonzales, Andrea [US] (SP)<mailto:Andrea.CocaGonzales at ngc.com>
May 28, 2024 at 09:32
All,
Attached are the planning files for Orbit #651. Please respond to this thread with comments and approvals. Approvals for the Orbit 651 ATS are required by COB , 31 May 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/06/19 15:00:00
Eclipse Flag False: 2024/06/19 16:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_162_o0651a_v001.ccvr
# Input files: 1
# IBEX_2024_162_o0651a_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 2024/06/11 08:32:09 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/06/14 23:57:33 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Best,
Andrea Coca Gonzales | Associate Engineer Satellite Systems | MEV | ICESat-2 | TESS | IBEX
Northrop Grumman Corporation | Space Systems
C: 703-582-8233 | Andrea.CocaGonzales at ngc.com<mailto:Andrea.CocaGonzales at ngc.com>
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