IBEX_2020_032_o0476a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2020_032_o0476a_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_2020_032_o0476a_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_2020_032_o0476a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage. The outage starts one day after apogee and runs for almost 2 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_Orbit476_Contacts.txt,

for all contacts (2).

We are doing battery cell balancing this orbit and the balancing commands are correct and offset by enough time from other commands.

The inertial maneuver at perigee of orbit 475 left us pointing in safe directions for the orbit 476 arc A ascending and descending sequences:

ibex_rotate -o -u 0.684385,-0.664862,-0.299291 -w ibex-sun -t 2020/02:02:02:39:33

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.684385,-0.664862,-0.299291

which is R.A. +315.829 Decl. -17.415

missing R.A. +314.911 Decl. -17.089 (ibex-sun)

error is R.A. +0.918 Decl. +0.326

for a total 0.936 deg

ibex_rotate -o -u 0.684385,-0.664862,-0.299291 -w ibex-sun -t 2020/02:05:21:41:45

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.684385,-0.664862,-0.299291

which is R.A. +315.829 Decl. -17.415

missing R.A. +318.801 Decl. -15.933 (ibex-sun)

error is R.A. +2.972 Decl. +1.482

for a total 3.210 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 0.742163,-0.611226,-0.274949 -w ibex-sun -t 2020/02:05:23:24:53

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.742163,-0.611226,-0.274949

which is R.A. +320.526 Decl. -15.959

missing R.A. +318.872 Decl. -15.911 (ibex-sun)

error is R.A. +1.654 Decl. + 0.048

for a total 1.591 deg

ibex_rotate -o -u 0.742163,-0.611226,-0.274949 -w ibex-sun -t 2020/02:06:00:59:59

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.742163,-0.611226,-0.274949

which is R.A. +320.526 Decl. -15.959

missing R.A. +318.937 Decl. -15.890 (ibex-sun)

error is R.A. +1.589 Decl. +0.069

for a total 1.529 deg

ibex_rotate -o -u 0.742163,-0.611226,-0.274949 -w ibex-sun -t 2020/02:10:16:17:31

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.742163,-0.611226,-0.274949

which is R.A. +320.526 Decl. -15.959

missing R.A. +323.458 Decl. -14.456 (ibex-sun)

error is R.A. +2.932 Decl. +1.503

for a total 3.204 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 477 apogee:

ibex_rotate -o -u 0.795094,-0.552337,-0.250498 -w ibex-sun -t 2020/02:10:19:46:34

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.795094,-0.552337,-0.250498

which is R.A. +325.213 Decl. -14.507

missing R.A. +323.608 Decl. -14.414 (ibex-sun)

error is R.A. +1.606 Decl. +0.093

for a total 1.557 deg

ibex_rotate -o -u 0.795094,-0.552337,-0.250498 -w ibex-sun -t 2020-02-15T14:59:01.965Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.795094,-0.552337,-0.250498

which is R.A. +325.213 Decl. -14.507

missing R.A. +328.425 Decl. -12.777 (ibex-sun)

error is R.A. +3.212 Decl. +1.730

for a total 3.568 deg

No Lo O-mode.

There is no overlap with orbit 475 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken