IBEX_2023_036_o0597a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2023_036_o0597a_v001.ccvr

are from the removal of the

ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

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_036_o0597a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts in orbit 596 before 15 Re descending and ends about a day after apogee (outage length is about 7 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_Orbit597_Contacts.txt,

for all contacts (3).

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

The sun precession maneuver at perigee of orbit 596 leaves us pointing in safe directions for the orbit 597 arc A ascending and descending sequences:

ibex_rotate -o -r +318.126 -d -16.127 -w ibex-sun -t 2023/02:05:21:47:58

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.715313,-0.641228,-0.277767

 which is     R.A. +318.126 Decl. -16.127

 missing      R.A. +318.967 Decl. -15.907 (ibex-sun)

 error is     R.A.   +0.841 Decl.  +0.220

 for a total  0.838 deg

ibex_rotate -o -r +318.126 -d -16.127 -w ibex-sun -t 2023/02:09:19:18:15

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.715313,-0.641228,-0.277767

 which is     R.A. +318.126 Decl. -16.127

 missing      R.A. +322.947 Decl. -14.624 (ibex-sun)

 error is     R.A.   +4.821 Decl.  +1.503

 for a total  4.885 deg

The sun precession maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for the arc B ascending and descending sequences:

ibex_rotate -o -r +323.020 -d -14.599 -w ibex-sun -t 2023/02:09:21:06:23

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.773054,-0.582115,-0.252052

 which is     R.A. +323.020 Decl. -14.599

 missing      R.A. +323.020 Decl. -14.599 (ibex-sun)

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

 for a total  0.000 deg

ibex_rotate -o -r +323.020 -d -14.599 -w ibex-sun -t 2023/02:09:22:36:29

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.773054,-0.582115,-0.252052

 which is     R.A. +323.020 Decl. -14.599

 missing      R.A. +323.081 Decl. -14.578 (ibex-sun)

 error is     R.A.   +0.061 Decl.  +0.021

 for a total  0.063 deg

ibex_rotate -o -r +323.020 -d -14.599 -w ibex-sun -t 2023/02:13:20:01:23

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.773054,-0.582115,-0.252052

 which is     R.A. +323.020 Decl. -14.599

 missing      R.A. +326.793 Decl. -13.339 (ibex-sun)

 error is     R.A.   +3.773 Decl.  +1.260

 for a total  3.873 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 598 apogee:

ibex_rotate -o -u 0.830284,-0.507285,-0.230848 -w ibex-sun -t 2023/02:13:22:46:24

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.830284,-0.507285,-0.230848

 which is     R.A. +328.576 Decl. -13.347

 missing      R.A. +326.904 Decl. -13.305 (ibex-sun)

 error is     R.A.   +1.672 Decl.  +0.042

 for a total  1.628 deg

ibex_rotate -o -u 0.830284,-0.507285,-0.230848 -w ibex-sun -t 2023-02-18T17:03:30.511Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.830284,-0.507285,-0.230848

 which is     R.A. +328.576 Decl. -13.347

 missing      R.A. +331.663 Decl. -11.612 (ibex-sun)

 error is     R.A.   +3.087 Decl.  +1.735

 for a total  3.478 deg

Lo Normal mode for the entire orbit.

There is no overlap with orbit 596 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken