Hi all,
The angle of decending after the apogee sun maneuver is 4.032 deg.
I have looked at the orbit 0630 ATS file, IBEX_2023_336_o0630a_v001.scr and I approve.
The constraint violations in IBEX_2023_336_o0630a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_336_o0630a_v001.scr match those in the STF, IBEX_2023_336_o0630a_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_336_o0630a_v001.oef and as verified
with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2023-12-04 04:05:48 and lasts for 115.2 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit630_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 Inertial maneuver at perigee of orbit 0629 left us pointing in safe directions for the orbit 0630 arc A ascending and descending sequences:
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023/12:02:17:00:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.362113,-0.851554,-0.379117
which is R.A. +246.963 Decl. -22.279
missing R.A. +248.305 Decl. -21.959 (ibex-sun)
error is R.A. +1.342 Decl. +0.320
for a total 1.283 deg
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023/12:06:16:28:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.362113,-0.851554,-0.379117
which is R.A. +246.963 Decl. -22.279
missing R.A. +252.619 Decl. -22.456 (ibex-sun)
error is R.A. +5.656 Decl. +0.177
for a total 5.234 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 +252.700 -d -22.464 -w ibex-sun -t 2023/12:06:18:16:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.274810,-0.882313,-0.382103
which is R.A. +252.700 Decl. -22.464
missing R.A. +252.700 Decl. -22.464 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +252.700 -d -22.464 -w ibex-sun -t 2023/12:06:19:46:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.274810,-0.882313,-0.382103
which is R.A. +252.700 Decl. -22.464
missing R.A. +252.767 Decl. -22.471 (ibex-sun)
error is R.A. +0.067 Decl. +0.007
for a total 0.062 deg
ibex_rotate -o -r +252.700 -d -22.464 -w ibex-sun -t 2023/12:10:18:53:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.274810,-0.882313,-0.382103
which is R.A. +252.700 Decl. -22.464
missing R.A. +257.046 Decl. -22.883 (ibex-sun)
error is R.A. +4.346 Decl. +0.419
for a total 4.032 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0631 apogee:
ibex_rotate -o -u -0.17728,-0.898951,-0.400573 -w ibex-sun -t 2023/12:10:21:08:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.177280,-0.898951,-0.400573
which is R.A. +258.844 Decl. -23.614
missing R.A. +257.153 Decl. -22.896 (ibex-sun)
error is R.A. +1.691 Decl. +0.718
for a total 1.712 deg
ibex_rotate -o -u -0.17728,-0.898951,-0.400573 -w ibex-sun -t 2023-12-15T19:25:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.177280,-0.898951,-0.400573
which is R.A. +258.844 Decl. -23.614
missing R.A. +262.665 Decl. -23.246 (ibex-sun)
error is R.A. +3.821 Decl. +0.368
for a total 3.525 deg
There is an overlap with the contact commands in Orbit 0629. This is acceptable.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492