IBEX_2017_355_o0391a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_355_o0391a_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_2017_355_o0391a_v002.stf.

Ascending and descending command sequences are consistent with each other and 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,

IBEX_2017_355_o0391a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts 2+ days before apogee and runs for 3+ days.  Some despinning may be required due to this outage.

There is one moon in Lo FOV session in arc A.  The ATS start time is almost two hours after that in the OEF and the ATS end time is 1 1/2 hours before that in the OEF.  These differences are not unusual.

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

IBEX_Orbit391_Contacts.txt,

for all contacts (3).

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 390 left us pointing in safe directions for the orbit 391 arc A ascending and descending sequences:

ibex_rotate -o -u 0.004719,-0.91337,-0.407103 -w ibex-sun -t 2017/12:21:13:18:15

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.004719,-0.913370,-0.407103

 which is     R.A. +270.296 Decl. -24.023

 missing      R.A. +269.625 Decl. -23.460 (ibex-sun)

 error is     R.A.   +0.671 Decl.  +0.563

 for a total  0.834 deg

ibex_rotate -o -u 0.004719,-0.91337,-0.407103 -w ibex-sun -t 2017/12:25:11:12:05

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.004719,-0.913370,-0.407103

 which is     R.A. +270.296 Decl. -24.023

 missing      R.A. +273.898 Decl. -23.408 (ibex-sun)

 error is     R.A.   +3.602 Decl.  +0.614

 for a total  3.355 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 +273.980 -d -23.405 -w ibex-sun -t 2017/12:25:13:00:13

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.063697,-0.915507,-0.397228

 which is     R.A. +273.980 Decl. -23.405

 missing      R.A. +273.980 Decl. -23.405 (ibex-sun)

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

 for a total  0.001 deg

ibex_rotate -o -r +273.980 -d -23.405 -w ibex-sun -t 2017/12:25:14:30:19

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.063697,-0.915507,-0.397228

 which is     R.A. +273.980 Decl. -23.405

 missing      R.A. +274.049 Decl. -23.403 (ibex-sun)

 error is     R.A.   +0.069 Decl.  +0.002

 for a total  0.063 deg

ibex_rotate -o -r +273.980 -d -23.405 -w ibex-sun -t 2017/12:29:12:00:51

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.063697,-0.915507,-0.397228

 which is     R.A. +273.980 Decl. -23.405

 missing      R.A. +278.369 Decl. -23.189 (ibex-sun)

 error is     R.A.   +4.389 Decl.  +0.216

 for a total  4.037 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 392 apogee:

ibex_rotate -o -u 0.163042,-0.901094,-0.401804 -w ibex-sun -t 2017/12:29:14:14:31

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.163042,-0.901094,-0.401804

 which is     R.A. +280.256 Decl. -23.691

 missing      R.A. +278.477 Decl. -23.185 (ibex-sun)

 error is     R.A.   +1.779 Decl.  +0.506

 for a total  1.708 deg

ibex_rotate -o -u 0.163042,-0.901094,-0.401804 -w ibex-sun -t 2018-01-03T13:39:41.150Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.163042,-0.901094,-0.401804

 which is     R.A. +280.256 Decl. -23.691

 missing      R.A. +283.982 Decl. -22.833 (ibex-sun)

 error is     R.A.   +3.726 Decl.  +0.858

 for a total  3.529 deg

No Lo O-mode.

There is no overlap with orbit 390 commands by manual inspection or by checking at

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

Command Approval Checklist is attached:

Ken