IBEX_2018_044_o0397a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2018_044_o0397a_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_2018_044_o0397a_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_2018_044_o0397a_v001.oef,

and as verified with ibex_orbit.

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

There is one moon in Lo FOV session in arc B.  The ATS start time is about 13 hours before that in the OEF and the ATS end time is about 8 1/2 hours after 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_Orbit397_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 396 left us pointing in safe directions for the orbit 397 arc A ascending and descending sequences:

ibex_rotate -o -u  0.775715,-0.575173,-0.259696 -w ibex-sun -t 2018/02:13:12:03:21

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.775715,-0.575173,-0.259696

 which is     R.A. +323.444 Decl. -15.052

 missing      R.A. +326.813 Decl. -13.375 (ibex-sun)

 error is     R.A.   +3.369 Decl.  +1.677

 for a total  3.671 deg

ibex_rotate -o -u  0.775715,-0.575173,-0.259696 -w ibex-sun -t 2018/02:16:22:33:00

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.775715,-0.575173,-0.259696

 which is     R.A. +323.444 Decl. -15.052

 missing      R.A. +330.209 Decl. -12.177 (ibex-sun)

 error is     R.A.   +6.765 Decl.  +2.875

 for a total  7.175 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 0.8625,-0.460416,-0.210028 -w ibex-sun -t 2018/02:17:00:16:08

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.862500,-0.460416,-0.210028

 which is     R.A. +331.906 Decl. -12.124

 missing      R.A. +330.277 Decl. -12.151 (ibex-sun)

 error is     R.A.   +1.629 Decl.  +0.027

 for a total  1.593 deg

ibex_rotate -o -u 0.8625,-0.460416,-0.210028 -w ibex-sun -t 2018/02:17:01:51:14

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.862500,-0.460416,-0.210028

 which is     R.A. +331.906 Decl. -12.124

 missing      R.A. +330.340 Decl. -12.128 (ibex-sun)

 error is     R.A.   +1.566 Decl.  +0.004

 for a total  1.531 deg

ibex_rotate -o -u 0.8625,-0.460416,-0.210028 -w ibex-sun -t 2018/02:21:09:13:34

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.862500,-0.460416,-0.210028

 which is     R.A. +331.906 Decl. -12.124

 missing      R.A. +334.381 Decl. -10.590 (ibex-sun)

 error is     R.A.   +2.475 Decl.  +1.534

 for a total  2.871 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 398 apogee:

ibex_rotate -o -u 0.899437,-0.396811,-0.183179 -w ibex-sun -t 2018/02:21:11:26:37

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.899437,-0.396811,-0.183179

 which is     R.A. +336.194 Decl. -10.555

 missing      R.A. +334.470 Decl. -10.559 (ibex-sun)

 error is     R.A.   +1.724 Decl.  +0.004

 for a total  1.695 deg

ibex_rotate -o -u 0.899437,-0.396811,-0.183179 -w ibex-sun -t 2018-02-26T09:31:34.335Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.899437,-0.396811,-0.183179

 which is     R.A. +336.194 Decl. -10.555

 missing      R.A. +339.258 Decl.  -8.743 (ibex-sun)

 error is     R.A.   +3.064 Decl.  +1.812

 for a total  3.522 deg

No Lo O-mode.

There is no overlap with orbit 396 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken