IBEX_2019_360_o0472a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2019_360_o0472a_v001.ccvr

are from the removal of the

ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

The PL commands in the v001 ATS match those in the v002 STF,

IBEX_2019_360_o0472a_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 form the OEF,

IBEX_2019_360_o0472a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage. The outage starts 2+ days after 15 Re ascending and runs for 3 1/2+ days. Some despinning may be required due to this outage.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file,

IBEX_Orbit472_Contacts.txt,

for all contacts (3).

We are not doing battery cell balancing this orbit - there is an eclipse near perigee.

The inertial maneuver at perigee of orbit 471 left us pointing in safe directions for the orbit 472 arc A ascending and descending sequences:

ibex_rotate -o -u 0.09429,-0.909322,-0.405269 -w ibex-sun -t 2019/12:27:00:44:00

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.094290,-0.909322,-0.405269

which is R.A. +275.920 Decl. -23.908

missing R.A. +275.125 Decl. -23.374 (ibex-sun)

error is R.A. +0.795 Decl. +0.534

for a total 0.903 deg

ibex_rotate -o -u 0.09429,-0.909322,-0.405269 -w ibex-sun -t 2019/12:31:04:06:03

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.094290,-0.909322,-0.405269

which is R.A. +275.920 Decl. -23.908

missing R.A. +279.675 Decl. -23.133 (ibex-sun)

error is R.A. +3.755 Decl. +0.775

for a total 3.529 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 +279.756 -d -23.126 -w ibex-sun -t 2019/12:31:05:54:11

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.155836,-0.906344,-0.392754

which is R.A. +279.756 Decl. -23.126

missing R.A. +279.756 Decl. -23.126 (ibex-sun)

error is R.A. +0.000 Decl. +0.000

for a total 0.000 deg

ibex_rotate -o -r +279.756 -d -23.126 -w ibex-sun -t 2019/12:31:07:24:17

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.155836,-0.906344,-0.392754

which is R.A. +279.756 Decl. -23.126

missing R.A. +279.824 Decl. -23.121 (ibex-sun)

error is R.A. +0.068 Decl. +0.005

for a total 0.063 deg

ibex_rotate -o -r +279.756 -d -23.126 -w ibex-sun -t 2020/01:04:11:21:53

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.155836,-0.906344,-0.392754

which is R.A. +279.756 Decl. -23.126

missing R.A. +284.397 Decl. -22.759 (ibex-sun)

error is R.A. +4.641 Decl. +0.367

for a total 4.289 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 473 apogee:

ibex_rotate -o -u 0.25639,-0.88273,-0.393765 -w ibex-sun -t 2020/01:04:14:44:07

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.256390,-0.882730,-0.393765

which is R.A. +286.196 Decl. -23.189

missing R.A. +284.561 Decl. -22.751 (ibex-sun)

error is R.A. +1.635 Decl. +0.438

for a total 1.568 deg

ibex_rotate -o -u 0.25639,-0.88273,-0.393765 -w ibex-sun -t 2020-01-09T14:24:00.384Z

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.256390,-0.882730,-0.393765

which is R.A. +286.196 Decl. -23.189

missing R.A. +290.053 Decl. -22.149 (ibex-sun)

error is R.A. +3.857 Decl. +1.040

for a total 3.708 deg

No Lo O-mode.

There is no overlap with orbit 471 commands by manual inspection or by checking at

http://ibex.unh.edu/cgi-bin/ats.cgi.

Command Approval Checklist is attached.

Ken