Hi all,
I have looked at the orbit 0650 ATS file, IBEX_2024_153_o0650a_v001.scr and I approve.
The constraint violations in IBEX_2024_153_o0650a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and a battery drop contraint that is likely due to a model
error. The violations are acceptable.
The PL commands in IBEX_2024_153_o0650a_v001.scr match those in the STF, IBEX_2024_153_o0650a_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_153_o0650a_v001.oef
and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-06-10 20:25:10 and lasts for 4.9 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit650_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 0649 left us pointing in safe directions for the orbit 0650 arc A ascending and descending sequences:
ibex_rotate -o -u 0.355024,0.861268,0.36356 -w ibex-sun -t 2024/06:02:08:19:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.355024,+0.861268,+0.363560
which is R.A. +67.598 Decl. +21.319
missing R.A. +70.420 Decl. +22.198 (ibex-sun)
error is R.A. +2.822 Decl. +0.879
for a total 2.764 deg
ibex_rotate -o -u 0.355024,0.861268,0.36356 -w ibex-sun -t 2024/06:05:21:29:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.355024,+0.861268,+0.363560
which is R.A. +67.598 Decl. +21.319
missing R.A. +74.062 Decl. +22.644 (ibex-sun)
error is R.A. +6.464 Decl. +1.325
for a total 6.138 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 0.284549,0.883406,0.372324 -w ibex-sun -t 2024/06:05:23:12:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.284549,+0.883406,+0.372324
which is R.A. +72.146 Decl. +21.859
missing R.A. +74.137 Decl. +22.653 (ibex-sun)
error is R.A. +1.991 Decl. +0.794
for a total 2.006 deg
ibex_rotate -o -u 0.284549,0.883406,0.372324 -w ibex-sun -t 2024/06:06:00:47:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.284549,+0.883406,+0.372324
which is R.A. +72.146 Decl. +21.859
missing R.A. +74.206 Decl. +22.660 (ibex-sun)
error is R.A. +2.060 Decl. +0.801
for a total 2.068 deg
ibex_rotate -o -u 0.284549,0.883406,0.372324 -w ibex-sun -t 2024/06:10:09:57:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.284549,+0.883406,+0.372324
which is R.A. +72.146 Decl. +21.859
missing R.A. +78.810 Decl. +23.056 (ibex-sun)
error is R.A. +6.664 Decl. +1.197
for a total 6.273 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0651 apogee:
ibex_rotate -o -u 0.210033,0.900571,0.380602 -w ibex-sun -t 2024/06:10:11:58:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.210033,+0.900571,+0.380602
which is R.A. +76.872 Decl. +22.371
missing R.A. +78.896 Decl. +23.059 (ibex-sun)
error is R.A. +2.024 Decl. +0.688
for a total 1.990 deg
ibex_rotate -o -u 0.210033,0.900571,0.380602 -w ibex-sun -t 2024-06-15T08:42:24
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.210033,+0.900571,+0.380602
which is R.A. +76.872 Decl. +22.371
missing R.A. +83.860 Decl. +23.338 (ibex-sun)
error is R.A. +6.988 Decl. +0.967
for a total 6.511 deg
There is no overlap with orbit 0649 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492