Hi all,
The angle at descending after the apogee sun maneuver is 4.126 deg.
I have looked at the orbit 0629 ATS file, IBEX_2023_326_o0629a_v002.scr and I approve.
The constraint violations in IBEX_2023_326_o0629a_v002.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_326_o0629a_v002.scr match those in the STF, IBEX_2023_326_o0629a_v004.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_326_o0629a_v002.oef and as verified
with ibex_orbit.
There are 2 star tracker outages this orbit. The first outage begins at 2023-11-25 00:11:23 and lasts for 41.4 hours. The second outage begins at 2023-11-29 01:15:59 and lasts for 10.5 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit629_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 0628 left us pointing in safe directions for the orbit 0629 arc A ascending and descending sequences:
ibex_rotate -o -u -0.535623,-0.771177,-0.34408 -w ibex-sun -t 2023/11:23:11:22:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.535624,-0.771178,-0.344081
which is R.A. +235.218 Decl. -20.126
missing R.A. +238.446 Decl. -20.295 (ibex-sun)
error is R.A. +3.228 Decl. +0.169
for a total 3.034 deg
ibex_rotate -o -u -0.535623,-0.771177,-0.34408 -w ibex-sun -t 2023/11:27:12:55:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.535624,-0.771178,-0.344081
which is R.A. +235.218 Decl. -20.126
missing R.A. +242.732 Decl. -21.055 (ibex-sun)
error is R.A. +7.514 Decl. +0.929
for a total 7.094 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 +242.810 -d -21.067 -w ibex-sun -t 2023/11:27:14:43:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.426401,-0.830043,-0.359459
which is R.A. +242.810 Decl. -21.067
missing R.A. +242.810 Decl. -21.067 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +242.810 -d -21.067 -w ibex-sun -t 2023/11:27:16:13:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.426401,-0.830043,-0.359459
which is R.A. +242.810 Decl. -21.067
missing R.A. +242.876 Decl. -21.078 (ibex-sun)
error is R.A. +0.066 Decl. +0.011
for a total 0.062 deg
ibex_rotate -o -r +242.810 -d -21.067 -w ibex-sun -t 2023/12:01:17:26:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.426401,-0.830043,-0.359459
which is R.A. +242.810 Decl. -21.067
missing R.A. +247.179 Decl. -21.760 (ibex-sun)
error is R.A. +4.369 Decl. +0.693
for a total 4.126 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0630 apogee:
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023/12:01:19:43:01
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. +247.285 Decl. -21.779 (ibex-sun)
error is R.A. +0.322 Decl. +0.500
for a total 0.582 deg
ibex_rotate -o -u -0.362113,-0.851554,-0.379117 -w ibex-sun -t 2023-12-06T18:01:48
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. +252.689 Decl. -22.463 (ibex-sun)
error is R.A. +5.726 Decl. +0.184
for a total 5.298 deg
There is an overlap with a contact in the orbit 0628 commands. This is acceptable.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492