There is one star tracker outage. The outage starts about 4 hours before apogee and runs for 2+ 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_Orbit553_Contacts.txt,
for all contacts (3).
We are not doing battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial precession maneuver at perigee of orbit 552 leaves us pointing in safe directions for the orbit 553 arc A ascending and descending sequences:
ibex_rotate -o -u 0.194222,-0.895965,-0.399405 -w ibex-sun -t 2022/01:01:04:48:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.194222,-0.895965,-0.399405
which is R.A. +282.231 Decl. -23.541
missing R.A. +281.373 Decl. -23.044 (ibex-sun)
error is R.A. +0.858 Decl. +0.497
for a total 0.932 deg
ibex_rotate -o -u 0.194222,-0.895965,-0.399405 -w ibex-sun -t 2022/01:04:11:41:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.194222,-0.895965,-0.399405
which is R.A. +282.231 Decl. -23.541
missing R.A. +285.035 Decl. -22.717 (ibex-sun)
error is R.A. +2.804 Decl. +0.824
for a total 2.707 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 0.272934,-0.87899,-0.391004 -w ibex-sun -t 2022/01:04:13:24:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.272934,-0.878990,-0.391004
which is R.A. +287.250 Decl. -23.017
missing R.A. +285.113 Decl. -22.708 (ibex-sun)
error is R.A. +2.137 Decl. +0.309
for a total 1.993 deg
ibex_rotate -o -u 0.272934,-0.87899,-0.391004 -w ibex-sun -t 2022/01:04:14:59:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.272934,-0.878990,-0.391004
which is R.A. +287.250 Decl. -23.017
missing R.A. +285.184 Decl. -22.700 (ibex-sun)
error is R.A. +2.066 Decl. +0.317
for a total 1.930 deg
ibex_rotate -o -u 0.272934,-0.87899,-0.391004 -w ibex-sun -t 2022/01:09:15:09:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.272934,-0.878990,-0.391004
which is R.A. +287.250 Decl. -23.017
missing R.A. +290.564 Decl. -22.079 (ibex-sun)
error is R.A. +3.314 Decl. +0.938
for a total 3.201 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 554 apogee:
ibex_rotate -o -u 0.351413,-0.85492,-0.381603 -w ibex-sun -t 2022/01:09:19:04:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.351413,-0.854920,-0.381603
which is R.A. +292.345 Decl. -22.433
missing R.A. +290.750 Decl. -22.062 (ibex-sun)
error is R.A. +1.595 Decl. +0.371
for a total 1.522 deg
ibex_rotate -o -u 0.351413,-0.85492,-0.381603 -w ibex-sun -t 2022-01-14T16:30:46.674Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.351413,-0.854920,-0.381603
which is R.A. +292.345 Decl. -22.433
missing R.A. +296.136 Decl. -21.250 (ibex-sun)
error is R.A. +3.791 Decl. +1.183
for a total 3.712 deg
Lo Normal mode for the entire orbit.
There is no overlap with orbit 552 commands by manual inspection or by checking at
Command Approval Checklist is attached.
Ken
