Hi all,
The angle at descending after the apogee Sun maneuver is 4.089 deg.
I have looked at the orbit 0663 ATS file, IBEX_2024_271_o0663a_v001.scr and I approve.
The constraint violations in IBEX_2024_271_o0663a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_271_o0663a_v001.scr match those in the STF, IBEX_2024_271_o0663a_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_271_o0663a_v001.oef
and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-09-28 10:36:05 and lasts for 38.4 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit663_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 0662 left us pointing in safe directions for the orbit 0663 arc A ascending and descending sequences:
ibex_rotate -o -u -0.999149,-0.033372,-0.024223 -w ibex-sun -t 2024/09:28:04:58:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999149,-0.033372,-0.024223
which is R.A. +181.913 Decl. -1.388
missing R.A. +184.809 Decl. -2.100 (ibex-sun)
error is R.A. +2.896 Decl. +0.712
for a total 2.982 deg
ibex_rotate -o -u -0.999149,-0.033372,-0.024223 -w ibex-sun -t 2024/10:02:07:11:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999149,-0.033372,-0.024223
which is R.A. +181.913 Decl. -1.388
missing R.A. +188.428 Decl. -3.612 (ibex-sun)
error is R.A. +6.515 Decl. +2.224
for a total 6.878 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 +188.496 -d -3.640 -w ibex-sun -t 2024/10:02:09:00:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.987031,-0.147442,-0.063487
which is R.A. +188.496 Decl. -3.640
missing R.A. +188.496 Decl. -3.640 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +188.496 -d -3.640 -w ibex-sun -t 2024/10:02:10:30:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.987031,-0.147442,-0.063487
which is R.A. +188.496 Decl. -3.640
missing R.A. +188.552 Decl. -3.663 (ibex-sun)
error is R.A. +0.056 Decl. +0.023
for a total 0.060 deg
ibex_rotate -o -r +188.496 -d -3.640 -w ibex-sun -t 2024/10:06:11:06:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.987031,-0.147442,-0.063487
which is R.A. +188.496 Decl. -3.640
missing R.A. +192.269 Decl. -5.244 (ibex-sun)
error is R.A. +3.773 Decl. +1.604
for a total 4.089 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0664 apogee:
ibex_rotate -o -u -0.980272,-0.177598,-0.086756 -w ibex-sun -t 2024/10:06:13:13:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980272,-0.177598,-0.086756
which is R.A. +190.269 Decl. -4.977
missing R.A. +192.354 Decl. -5.283 (ibex-sun)
error is R.A. +2.085 Decl. +0.306
for a total 2.099 deg
ibex_rotate -o -u -0.980272,-0.177598,-0.086756 -w ibex-sun -t 2024-10-11T13:46:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980272,-0.177598,-0.086756
which is R.A. +190.269 Decl. -4.977
missing R.A. +196.913 Decl. -7.163 (ibex-sun)
error is R.A. +6.644 Decl. +2.186
for a total 6.959 deg
There is no overlap with orbit 0662 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492