[Isocops] IBEX Orbit #562 ATS Approval (24 Mar – 03 Apr 2022)
Carol Weaver
Carol.Weaver at unh.edu
Mon Mar 14 11:38:50 EDT 2022
Hi all,
I have looked at the orbit 0562 ATS file, IBEX_2022_083_o0562a_v001.scr and I approve.
The constraint violations in IBEX_2022_083_o0562a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2022_083_o0562a_v001.scr match those in the STF, IBEX_2022_083_o0562a_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_083_o0562a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit lasting ~4.5 hours and ending ~5.3 hours before the perigee maneuver.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit562_Contacts.txt for all contacts (2).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0561 left us pointing in safe directions for the orbit 0562 arc A ascending and descending sequences:
ibex_rotate -o -u 0.999527,0.030573,0.003438 -w ibex-sun -t 2022/03:25:07:53:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999527,+0.030573,+0.003438
which is R.A. +1.752 Decl. +0.197
missing R.A. +3.965 Decl. +1.697 (ibex-sun)
error is R.A. +2.213 Decl. +1.500
for a total 2.673 deg
ibex_rotate -o -u 0.999527,0.030573,0.003438 -w ibex-sun -t 2022/03:29:00:29:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999527,+0.030573,+0.003438
which is R.A. +1.752 Decl. +0.197
missing R.A. +7.431 Decl. +3.212 (ibex-sun)
error is R.A. +5.679 Decl. +3.015
for a total 6.427 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 0.99421,0.102145,0.033365 -w ibex-sun -t 2022/03:29:02:12:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.994210,+0.102145,+0.033365
which is R.A. +5.866 Decl. +1.912
missing R.A. +7.496 Decl. +3.242 (ibex-sun)
error is R.A. +1.630 Decl. +1.330
for a total 2.103 deg
ibex_rotate -o -u 0.99421,0.102145,0.033365 -w ibex-sun -t 2022/03:29:03:47:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.994210,+0.102145,+0.033365
which is R.A. +5.866 Decl. +1.912
missing R.A. +7.557 Decl. +3.269 (ibex-sun)
error is R.A. +1.691 Decl. +1.357
for a total 2.166 deg
ibex_rotate -o -u 0.99421,0.102145,0.033365 -w ibex-sun -t 2022/04:02:14:59:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.994210,+0.102145,+0.033365
which is R.A. +5.866 Decl. +1.912
missing R.A. +11.526 Decl. +4.964 (ibex-sun)
error is R.A. +5.660 Decl. +3.052
for a total 6.421 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0563 apogee:
ibex_rotate -o -u 0.982755,0.173039,0.065194 -w ibex-sun -t 2022/04:02:18:45:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.982755,+0.173039,+0.065194
which is R.A. +9.986 Decl. +3.738
missing R.A. +11.663 Decl. +5.015 (ibex-sun)
error is R.A. +1.677 Decl. +1.277
for a total 2.104 deg
ibex_rotate -o -u 0.982755,0.173039,0.065194 -w ibex-sun -t 2022-04-07T14:44:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.982755,+0.173039,+0.065194
which is R.A. +9.986 Decl. +3.738
missing R.A. +16.181 Decl. +6.900 (ibex-sun)
error is R.A. +6.195 Decl. +3.162
for a total 6.931 deg
There is no overlap with orbit 0561 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: Friday, 2022-March-11 at 10:54
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>, fair-play at comcast.net <fair-play at comcast.net>, 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: IBEX Orbit #562 ATS Approval (24 Mar – 03 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 #562. Please respond to this thread with comments and approvals.
Approvals are required by COB, 14 Mar 2022
Please note the following:
1. No Battery Balancing this orbit
1. Command Load Constraint Violation Report (CCVR)
IBEX_2022_083_o0562a_v001.ccvr
# Input files: 1
# IBEX_2022_083_o0562a_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 2022/03/25 04:36:31 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2022/03/29 03:17:31 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D83535.EA4EC800]
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