Hi all,
I have looked at the orbit 0604 ATS file, IBEX_2023_099_o0604a_v001.scr and I approve.
The constraint violations in IBEX_2023_099_o0604a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_099_o0604a_v001.scr match those in the STF, IBEX_2023_099_o0604a_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_099_o0604a_v001.oef and as verified
with ibex_orbit.
There is 1 star tracker outage this orbit. It lasts for ~8.8 hours and ends ~.8 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_Orbit604_Contacts.txt for all contacts (3).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0603 left us pointing in safe directions for the orbit 0604 arc A ascending and descending sequences:
ibex_rotate -o -u 0.957653,0.267634,0.106177 -w ibex-sun -t 2023/04:09:21:11:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.957653,+0.267634,+0.106177
which is R.A. +15.614 Decl. +6.095
missing R.A. +17.918 Decl. +7.575 (ibex-sun)
error is R.A. +2.304 Decl. +1.480
for a total 2.724 deg
ibex_rotate -o -u 0.957653,0.267634,0.106177 -w ibex-sun -t 2023/04:13:12:29:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.957653,+0.267634,+0.106177
which is R.A. +15.614 Decl. +6.095
missing R.A. +21.343 Decl. +8.972 (ibex-sun)
error is R.A. +5.729 Decl. +2.877
for a total 6.366 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 0.932664,0.334824,0.13428 -w ibex-sun -t 2023/04:13:14:12:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.932664,+0.334824,+0.134280
which is R.A. +19.748 Decl. +7.717
missing R.A. +21.409 Decl. +8.999 (ibex-sun)
error is R.A. +1.661 Decl. +1.282
for a total 2.085 deg
ibex_rotate -o -u 0.932664,0.334824,0.13428 -w ibex-sun -t 2023/04:13:15:47:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.932664,+0.334824,+0.134280
which is R.A. +19.748 Decl. +7.717
missing R.A. +21.471 Decl. +9.025 (ibex-sun)
error is R.A. +1.723 Decl. +1.308
for a total 2.148 deg
ibex_rotate -o -u 0.932664,0.334824,0.13428 -w ibex-sun -t 2023/04:18:02:50:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.932664,+0.334824,+0.134280
which is R.A. +19.748 Decl. +7.717
missing R.A. +25.543 Decl. +10.604 (ibex-sun)
error is R.A. +5.795 Decl. +2.887
for a total 6.408 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0605 apogee:
ibex_rotate -o -u 0.901235,0.401086,0.164032 -w ibex-sun -t 2023/04:18:11:51:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.901235,+0.401086,+0.164032
which is R.A. +23.991 Decl. +9.441
missing R.A. +25.874 Decl. +10.711 (ibex-sun)
error is R.A. +1.883 Decl. +1.270
for a total 2.247 deg
ibex_rotate -o -u 0.901235,0.401086,0.164032 -w ibex-sun -t 2023-04-23T06:06:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.901235,+0.401086,+0.164032
which is R.A. +23.991 Decl. +9.441
missing R.A. +30.384 Decl. +12.381 (ibex-sun)
error is R.A. +6.393 Decl. +2.940
for a total 6.931 deg
There is no overlap with orbit 0603 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492
From:
Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>
Date: Sunday, March 26, 2023 at 09:59
To: Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, IBEX FDG Group <ADS-IBEX@l3harris.com>, IBEXOPS <IBEXOPS@gmail.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <fair-play@comcast.net>,
Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting <angoldconsulting@earthlink.net>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, Tyler, Ryan
S [US] (SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit #604 ATS Approval (09 - 18 Apr 2023)
CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize
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All,
Attached are the planning files for Orbit #604.
Please respond to this thread with comments and approvals.
Approvals are required by COB, 29 Mar 2023
Please note the following:
1.
No Battery Balancing this orbit
2.
Command Load Constraint Violation Report (CCVR)
IBEX_2023_099_o0604a_v001.ccvr
# Input files:
1
#
IBEX_2023_099_o0604a_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 2023/04/09 19:05:24 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/04/13 15:17:31 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.