Hi all,
The angle at descending after the apogee sun maneuver is 3.961 degrees and the angle at the Orbit 605 apogee after doing the perigee sun maneuver is 4.953 degrees.
I have looked at the orbit 0604 ATS file, IBEX_2023_099_o0604a_v002.scr and I approve.
The constraint violations in IBEX_2023_099_o0604a_v002.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_099_o0604a_v002.scr match those in the STF, IBEX_2023_099_o0604a_v004.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_v002.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. It lasts for ~9.5 hours over the perigee maneuver window.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit604_Contacts_v2.txt for all contacts (3).
No Battery Balancing this orbit.
The Sun 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 -r +17.225 -d +7.327 -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 +0.947350,+0.293707,+0.127532
which is R.A. +17.225 Decl. +7.327
missing R.A. +17.918 Decl. +7.575 (ibex-sun)
error is R.A. +0.693 Decl. +0.248
for a total 0.730 deg
ibex_rotate -o -r +17.225 -d +7.327 -w ibex-sun -t 2023/04:13:22:26:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.947350,+0.293707,+0.127532
which is R.A. +17.225 Decl. +7.327
missing R.A. +21.729 Decl. +9.130 (ibex-sun)
error is R.A. +4.504 Decl. +1.803
for a total 4.809 deg
The Sun 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 -r +21.799 -d +9.159 -w ibex-sun -t 2023/04:14:00:14:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.916654,+0.366617,+0.159175
which is R.A. +21.799 Decl. +9.159
missing R.A. +21.799 Decl. +9.159 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +21.799 -d +9.159 -w ibex-sun -t 2023/04:14:01:44:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.916654,+0.366617,+0.159175
which is R.A. +21.799 Decl. +9.159
missing R.A. +21.858 Decl. +9.182 (ibex-sun)
error is R.A. +0.059 Decl. +0.023
for a total 0.062 deg
ibex_rotate -o -r +21.799 -d +9.159 -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 +0.916654,+0.366617,+0.159175
which is R.A. +21.799 Decl. +9.159
missing R.A. +25.543 Decl. +10.604 (ibex-sun)
error is R.A. +3.744 Decl. +1.445
for a total 3.961 deg
The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0605 apogee:
ibex_rotate -o -r +25.652 -d +10.640 -w ibex-sun -t 2023/04:18:05:48:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.885941,+0.425461,+0.184638
which is R.A. +25.652 Decl. +10.640
missing R.A. +25.652 Decl. +10.640 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +25.652 -d +10.640 -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 +0.885941,+0.425461,+0.184638
which is R.A. +25.652 Decl. +10.640
missing R.A. +30.384 Decl. +12.381 (ibex-sun)
error is R.A. +4.732 Decl. +1.741
for a total 4.953 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: Monday, April 3, 2023 at 20:03
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 Version 2 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, 04 April 2023
Please note the following:
3. No Battery
Balancing this orbit
4.
Command Load Constraint Violation Report (CCVR)
IBEX_2023_099_o0604a_v002.ccvr
# Input files:
1
#
IBEX_2023_099_o0604a_v002.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 2023/04/14 01:14:55 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.