Hi all,
The Sun maneuver from perigee of Orbit 622 leaves the angle at descending at 4.694 deg. The Sun maneuver at apogee of 623 leaves the angle at descending at 4.049
I have looked at the orbit 0623 ATS file, IBEX_2023_272_o0623a_v001.scr and I approve.
The constraint violations in IBEX_2023_272_o0623a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_272_o0623a_v001.scr match those in the STF, IBEX_2023_272_o0623a_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_272_o0623a_v001.oef and as verified
with ibex_orbit.
There are 2 star tracker outages this orbit. Outage begins at 2023-09-29 21:56:00 and lasts for 17.5 hours. Outage begins at 2023-09-30 19:22:39 and lasts for 11.4 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit623_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 Sun maneuver at perigee of orbit 0622 left us pointing in safe directions for the orbit 0623 arc A ascending and descending sequences:
ibex_rotate -o -r +185.332 -d -2.291 -w ibex-sun -t 2023/09:29:12:52:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.994877,-0.092852,-0.039975
which is R.A. +185.332 Decl. -2.291
missing R.A. +185.332 Decl. -2.291 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +185.332 -d -2.291 -w ibex-sun -t 2023/09:30:09:27:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.994877,-0.092852,-0.039975
which is R.A. +185.332 Decl. -2.291
missing R.A. +186.115 Decl. -2.666 (ibex-sun)
error is R.A. +0.783 Decl. +0.375
for a total 0.868 deg
ibex_rotate -o -r +185.332 -d -2.291 -w ibex-sun -t 2023/10:04:09:35:00
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.994877,-0.092852,-0.039975
which is R.A. +185.332 Decl. -2.291
missing R.A. +189.653 Decl. -4.141 (ibex-sun)
error is R.A. +4.321 Decl. +1.850
for a total 4.694 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 +189.721 -d-4.169 -w ibex-sun -t 2023/10:04:11:23:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.983034,-0.168404,-0.072699
which is R.A. +189.721 Decl. -4.169
missing R.A. +189.721 Decl. -4.169 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +189.721 -d-4.169 -w ibex-sun -t 2023/10:04:12:53:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.983034,-0.168404,-0.072699
which is R.A. +189.721 Decl. -4.169
missing R.A. +189.777 Decl. -4.192 (ibex-sun)
error is R.A. +0.056 Decl. +0.023
for a total 0.061 deg
ibex_rotate -o -r +189.721 -d-4.169 -w ibex-sun -t 2023/10:08:12:10:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.983034,-0.168404,-0.072699
which is R.A. +189.721 Decl. -4.169
missing R.A. +193.465 Decl. -5.744 (ibex-sun)
error is R.A. +3.744 Decl. +1.575
for a total 4.049 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0624 apogee:
ibex_rotate -o -u -0.975646,-0.197505,-0.095429 -w ibex-sun -t 2023/10:08:14:38:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.975646,-0.197505,-0.095429
which is R.A. +191.444 Decl. -5.476
missing R.A. +193.564 Decl. -5.790 (ibex-sun)
error is R.A. +2.120 Decl. +0.314
for a total 2.133 deg
ibex_rotate -o -u -0.975646,-0.197505,-0.095429 -w ibex-sun -t 2023-10-13T11:24:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.975646,-0.197505,-0.095429
which is R.A. +191.444 Decl. -5.476
missing R.A. +197.976 Decl. -7.603 (ibex-sun)
error is R.A. +6.532 Decl. +2.127
for a total 6.829 deg
There is no overlap with orbit 0622 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492