IBEX_2021_329_o0549a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2021_329_o0549a_v001.ccvr

are from the removal of the

ACT_SetSpinPulseProtectEnable Enable

commands (2) and the eclipse; the violations are expected.

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

IBEX_2021_329_o0549a_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_2021_329_o0549a_v001.oef,

and as verified with ibex_orbit.

There are two star tracker outages. The first starts 1+ day after 15 Re ascending and runs for about 2.5 days. The second starts at apogee and runs for 1- days. Some despinning may be required due to these outages.

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

IBEX_Orbit549_Contacts.txt,

for all contacts (3).

There is an eclipse near perigee so we aren't doing battery cell balancing. The timing of the long eclipse flag commands matches Ryan's recommendations.

The inertial precession maneuver at perigee of orbit 548 leaves us pointing in safe directions for the orbit 549 arc A ascending and descending sequences:

ibex_rotate -o -u -0.495239,-0.793472,-0.353752 -w ibex-sun -t 2021/11:25:14:24:26

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.495239,-0.793472,-0.353752

which is R.A. +238.030 Decl. -20.717

missing R.A. +241.232 Decl. -20.827 (ibex-sun)

error is R.A. +3.202 Decl. +0.110

for a total 2.996 deg

ibex_rotate -o -u -0.495239,-0.793472,-0.353752 -w ibex-sun -t 2021/11:29:15:19:04

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.495239,-0.793472,-0.353752

which is R.A. +238.030 Decl. -20.717

missing R.A. +245.490 Decl. -21.514 (ibex-sun)

error is R.A. +7.460 Decl. +0.797

for a total 7.004 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 +245.569 -d -21.526 -w ibex-sun -t 2021/11:29:17:07:12

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.384749,-0.846956,-0.366923

which is R.A. +245.569 Decl. -21.526

missing R.A. +245.569 Decl. -21.526 (ibex-sun)

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

for a total 0.000 deg

ibex_rotate -o -r +245.569 -d -21.526 -w ibex-sun -t 2021/11:29:18:37:18

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.384749,-0.846956,-0.366923

which is R.A. +245.569 Decl. -21.526

missing R.A. +245.635 Decl. -21.535 (ibex-sun)

error is R.A. +0.066 Decl. +0.009

for a total 0.062 deg

ibex_rotate -o -r +245.569 -d -21.526 -w ibex-sun -t 2021/12:03:19:15:29

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.384749,-0.846956,-0.366923

which is R.A. +245.569 Decl. -21.526

missing R.A. +249.988 Decl. -22.146 (ibex-sun)

error is R.A. +4.419 Decl. +0.620

for a total 4.148 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 550 apogee:

ibex_rotate -o -u -0.320209,-0.865499,-0.385197 -w ibex-sun -t 2021/12:03:22:20:22

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.320209,-0.865499,-0.385197

which is R.A. +249.697 Decl. -22.656

missing R.A. +250.135 Decl. -22.170 (ibex-sun)

error is R.A. +0.438 Decl. +0.486

for a total 0.632 deg

ibex_rotate -o -u -0.320209,-0.865499,-0.385197 -w ibex-sun -t 2021-12-08T18:35:57.914Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.320209,-0.865499,-0.385197

which is R.A. +249.697 Decl. -22.656

missing R.A. +255.428 Decl. -22.748 (ibex-sun)

error is R.A. +5.731 Decl. +0.092

for a total 5.288 deg

Lo Normal mode for the entire orbit.

There is no overlap with orbit 548 commands (except for a contact) by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken