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_2022_129_o0567a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts ~1 day before 15 Re descending and runs for about 1.5 days. Some despinning may be required due to this outage.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit567_Contacts.txt,
for all contacts (3).
We are doing battery cell balancing and the balancing commands are correct and offset by enough time from other commands.
The inertial precession maneuver at perigee of orbit 566 leaves us pointing in safe directions for the orbit 567 arc A ascending and descending sequences:
ibex_rotate -o -u 0.694466,0.663692,0.277902 -w ibex-sun -t 2022/05:09:15:19:48
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.694466,+0.663692,+0.277902
which is R.A. +43.702 Decl. +16.135
missing R.A. +46.202 Decl. +17.353 (ibex-sun)
error is R.A. +2.500 Decl. +1.218
for a total 2.686 deg
ibex_rotate -o -u 0.694466,0.663692,0.277902 -w ibex-sun -t 2022/05:13:04:19:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.694466,+0.663692,+0.277902
which is R.A. +43.702 Decl. +16.135
missing R.A. +49.725 Decl. +18.305 (ibex-sun)
error is R.A. +6.023 Decl. +2.170
for a total 6.148 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 0.639493,0.709283,0.296592 -w ibex-sun -t 2022/05:13:06:02:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.639493,+0.709283,+0.296592
which is R.A. +47.962 Decl. +17.253
missing R.A. +49.796 Decl. +18.324 (ibex-sun)
error is R.A. +1.834 Decl. +1.071
for a total 2.049 deg
ibex_rotate -o -u 0.639493,0.709283,0.296592 -w ibex-sun -t 2022/05:13:07:37:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.639493,+0.709283,+0.296592
which is R.A. +47.962 Decl. +17.253
missing R.A. +49.862 Decl. +18.342 (ibex-sun)
error is R.A. +1.900 Decl. +1.089
for a total 2.112 deg
ibex_rotate -o -u 0.639493,0.709283,0.296592 -w ibex-sun -t 2022/05:17:15:03:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.639493,+0.709283,+0.296592
which is R.A. +47.962 Decl. +17.253
missing R.A. +54.105 Decl. +19.367 (ibex-sun)
error is R.A. +6.143 Decl. +2.114
for a total 6.202 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 568 apogee:
ibex_rotate -o -u 0.579312,0.75141,0.315881 -w ibex-sun -t 2022/05:18:03:26:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.579312,+0.751410,+0.315881
which is R.A. +52.369 Decl. +18.414
missing R.A. +54.586 Decl. +19.452 (ibex-sun)
error is R.A. +2.217 Decl. +1.038
for a total 2.339 deg
ibex_rotate -o -u 0.579312,0.75141,0.315881 -w ibex-sun -t 2022-05-22T12:39:47.659Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.579312,+0.751410,+0.315881
which is R.A. +52.369 Decl. +18.414
missing R.A. +59.002 Decl. +20.396 (ibex-sun)
error is R.A. +6.633 Decl. +1.982
for a total 6.562 deg
Lo Normal mode for the entire orbit.
There is no overlap with orbit 566 commands by manual inspection or by checking at
Command Approval Checklist is attached.
Ken