Hi all,
The angle at descending after the apogee Sun maneuver is 3.959 deg.
I have looked at the orbit 0624 ATS file, IBEX_2023_281_o0624a_v001.scr and I approve.
The constraint violations in IBEX_2023_281_o0624a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_281_o0624a_v001.scr match those in the STF, IBEX_2023_281_o0624a_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_281_o0624a_v001.oef and as verified
with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2023-10-10 00:30:09 and lasts for 35.8 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit624_Contacts.txt for all contacts (4).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, 4.788 hrs, and more than 15 minutes away from a maneuver, 148 mins.
The Inertial maneuver at perigee of orbit 0623 left us pointing in safe directions for the orbit 0624 arc A ascending and descending sequences:
ibex_rotate -o -u -0.975646,-0.197505,-0.095429 -w ibex-sun -t 2023/10:09:11:21:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.975646,-0.197505,-0.095429
which is R.A. +191.444 Decl. -5.476
missing R.A. +194.373 Decl. -6.163 (ibex-sun)
error is R.A. +2.929 Decl. +0.687
for a total 2.994 deg
ibex_rotate -o -u -0.975646,-0.197505,-0.095429 -w ibex-sun -t 2023/10:13:09:51:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.975646,-0.197505,-0.095429
which is R.A. +191.444 Decl. -5.476
missing R.A. +197.917 Decl. -7.580 (ibex-sun)
error is R.A. +6.473 Decl. +2.104
for a total 6.766 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 +197.986 -d -7.607 -w ibex-sun -t 2023/10:13:11:40:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.942761,-0.306067,-0.132377
which is R.A. +197.986 Decl. -7.607
missing R.A. +197.986 Decl. -7.607 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +197.986 -d -7.607 -w ibex-sun -t 2023/10:13:13:10:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.942761,-0.306067,-0.132377
which is R.A. +197.986 Decl. -7.607
missing R.A. +198.043 Decl. -7.629 (ibex-sun)
error is R.A. +0.057 Decl. +0.022
for a total 0.061 deg
ibex_rotate -o -r +197.986 -d -7.607 -w ibex-sun -t 2023/10:17:10:12:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.942761,-0.306067,-0.132377
which is R.A. +197.986 Decl. -7.607
missing R.A. +201.698 Decl. -9.085 (ibex-sun)
error is R.A. +3.712 Decl. +1.478
for a total 3.959 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0625 apogee:
ibex_rotate -o -u -0.930464,-0.332477,-0.153934 -w ibex-sun -t 2023/10:17:12:32:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.930464,-0.332477,-0.153934
which is R.A. +199.663 Decl. -8.855
missing R.A. +201.794 Decl. -9.126 (ibex-sun)
error is R.A. +2.131 Decl. +0.271
for a total 2.122 deg
ibex_rotate -o -u -0.930464,-0.332477,-0.153934 -w ibex-sun -t 2023-10-22T09:13:32
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.930464,-0.332477,-0.153934
which is R.A. +199.663 Decl. -8.855
missing R.A. +206.319 Decl. -10.863 (ibex-sun)
error is R.A. +6.656 Decl. +2.008
for a total 6.858 deg
There is no overlap with orbit 0623 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492