Hi all,
Note: There are two sun precession maneuvers this orbit. The angle at descending after the apogee maneuver is 3.943 degrees. The angle at apogee for the next orbit is 4.757 degrees.
The file names for the ATS and CCVR have the day of year reversed (246 vs 264). All information in the file is correct.
I have looked at the orbit 0622 ATS file, IBEX_2023_246_o0622a_v001.scr and I approve.
The constraint violations in IBEX_2023_246_o0622a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_246_o0622a_v001.scr match those in the STF, IBEX_2023_264_o0622a_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_264_o0622a_v001.oef and as verified
with ibex_orbit.
There are 2 star tracker outages this orbit. The first outage begins at 2023-09-23 21:35:00 and lasts for 108.5 hours. The second outage begins at 2023-09-28 14:39:40 and lasts for 42.8 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit622_Contacts.txt for all contacts (3).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0621 left us pointing in safe directions for the orbit 0622 arc A ascending and descending sequences:
ibex_rotate -o -u -0.996242,0.082624,0.025985 -w ibex-sun -t 2023/09:21:12:38:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.996242,+0.082624,+0.025985
which is R.A. +175.259 Decl. +1.489
missing R.A. +178.137 Decl. +0.786 (ibex-sun)
error is R.A. +2.878 Decl. +0.703
for a total 2.962 deg
ibex_rotate -o -u -0.996242,0.082624,0.025985 -w ibex-sun -t 2023/09:25:10:09:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.996242,+0.082624,+0.025985
which is R.A. +175.259 Decl. +1.489
missing R.A. +181.543 Decl. -0.653 (ibex-sun)
error is R.A. +6.284 Decl. +2.142
for a total 6.639 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 +181.610 -d -0.682 -w ibex-sun -t 2023/09:25:11:57:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999534,-0.028094,-0.011903
which is R.A. +181.610 Decl. -0.682
missing R.A. +181.610 Decl. -0.682 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +181.610 -d -0.682-w ibex-sun -t 2023/09:25:13:28:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999534,-0.028094,-0.011903
which is R.A. +181.610 Decl. -0.682
missing R.A. +181.666 Decl. -0.705 (ibex-sun)
error is R.A. +0.056 Decl. +0.023
for a total 0.061 deg
ibex_rotate -o -r +181.610 -d -0.682 -w ibex-sun -t 2023/09:29:10:21:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.999534,-0.028094,-0.011903
which is R.A. +181.610 Decl. -0.682
missing R.A. +185.231 Decl. -2.244 (ibex-sun)
error is R.A. +3.621 Decl. +1.562
for a total 3.943 deg
The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0623 apogee:
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 0.001 deg
ibex_rotate -o -r +185.332 -d -2.291 -w ibex-sun -t 2023-10-04T11:08:06
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. +189.711 Decl. -4.165 (ibex-sun)
error is R.A. +4.379 Decl. +1.874
for a total 4.757 deg
There is no overlap with orbit 0621 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492