Hi all,
The pointing direction at descending after the apogee Sun Maneuver is 4.097 deg
The pointing direction at the next orbit apogee after the perigee Sun Maneuwer is 5.076 deg
I have looked at the orbit 0664 ATS file, IBEX_2024_280_o0664a_v001.scr and I approve.
The constraint violations in IBEX_2024_280_0664_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_280_o0664a_v001.scr match those in the STF, IBEX_2024_280_o0664a_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_2024_280_o0664a_v001.oef
and as verified with ibex_orbit.
There are 2 star tracker outages this orbit. The first outage begins at 2024-10-07 17:55:49 and lasts for 52.1 hours. The second outage begins at 2024-10-12 17:31:17 and lasts
for 73.3 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit664_Contacts.txt for all contacts (3).
No Battery Balancing this orbit.
The Inertial maneuver at perigee of orbit 0663 left us pointing in safe directions for the orbit 0664 arc A ascending and descending sequences:
ibex_rotate -o -u -0.980272,-0.177598,-0.086756 -w ibex-sun -t 2024/10:07:10:58:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980272,-0.177598,-0.086756
which is R.A. +190.269 Decl. -4.977
missing R.A. +193.207 Decl. -5.675 (ibex-sun)
error is R.A. +2.938 Decl. +0.698
for a total 3.008 deg
ibex_rotate -o -u -0.980272,-0.177598,-0.086756 -w ibex-sun -t 2024/10:11:12:13:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980272,-0.177598,-0.086756
which is R.A. +190.269 Decl. -4.977
missing R.A. +196.854 Decl. -7.140 (ibex-sun)
error is R.A. +6.585 Decl. +2.163
for a total 6.896 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 +196.923 -d -7.167 -w ibex-sun -t 2024/10:11:14:01:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.949222,-0.288812,-0.124762
which is R.A. +196.923 Decl. -7.167
missing R.A. +196.923 Decl. -7.167 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
[carolweav@ena v01]$ ibex_rotate -o -r +196.923 -d -7.167 -w ibex-sun -t 2024/10:11:15:31:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.949222,-0.288812,-0.124762
which is R.A. +196.923 Decl. -7.167
missing R.A. +196.980 Decl. -7.190 (ibex-sun)
error is R.A. +0.057 Decl. +0.023
for a total 0.061 deg
[carolweav@ena v01]$ ibex_rotate -o -r +196.923 -d -7.167 -w ibex-sun -t 2024/10:15:16:16:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.949222,-0.288812,-0.124762
which is R.A. +196.923 Decl. -7.167
missing R.A. +200.754 Decl. -8.714 (ibex-sun)
error is R.A. +3.831 Decl. +1.547
for a total 4.097 deg
The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0665 apogee:
ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:15:18:22:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.923698,-0.351618,-0.152141
which is R.A. +200.840 Decl. -8.751
missing R.A. +200.840 Decl. -8.751 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
[carolweav@ena v01]$ ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024-10-20T21:59:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.923698,-0.351618,-0.152141
which is R.A. +200.840 Decl. -8.751
missing R.A. +205.637 Decl. -10.597 (ibex-sun)
error is R.A. +4.797 Decl. +1.846
for a total 5.076 deg
There is no overlap with orbit 0663 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492