IBEX_2018_017_o0394a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2018_017_o0394a_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_017_o0394a_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_017_o0394a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts about 1 1/2 days before apogee and runs 4+ days.  Some despinning may be required due to this outage.

There are two moon in Lo FOV sessions in the OEF but only one in the ATS (the second session starts during the apogee maneuver and ends about two hours after the apogee ascending sequence).  The first session is in arc A.  The ATS start time is about 8 hours after that in the OEF and the ATS end time is about 5 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_Orbit394_Contacts.txt,

for all contacts (3).

There is an eclipse near perigee.  The LE flag commands are correct, agree with Ryan's timing recommendations and are offset by enough time from other commands.

The inertial maneuver at perigee of orbit 393 left us pointing in safe directions for the orbit 394 arc A ascending and descending sequences:

ibex_rotate -o -u 0.398892,-0.837498,-0.373474 -w ibex-sun -t 2018/01:17:14:49:48

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.398892,-0.837498,-0.373474

 which is     R.A. +295.468 Decl. -21.930

 missing      R.A. +299.289 Decl. -20.736 (ibex-sun)

 error is     R.A.   +3.821 Decl.  +1.194

 for a total  3.754 deg

ibex_rotate -o -u 0.398892,-0.837498,-0.373474 -w ibex-sun -t 2018/01:21:11:49:50

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.398892,-0.837498,-0.373474

 which is     R.A. +295.468 Decl. -21.930

 missing      R.A. +303.393 Decl. -19.915 (ibex-sun)

 error is     R.A.   +7.925 Decl.  +2.015

 for a total  7.670 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 +303.470 -d -19.897 -w ibex-sun -t 2018/01:21:13:37:58

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.518579,-0.784379,-0.340330

 which is     R.A. +303.470 Decl. -19.897

 missing      R.A. +303.470 Decl. -19.897 (ibex-sun)

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

 for a total  0.001 deg

ibex_rotate -o -r +303.470 -d -19.897 -w ibex-sun -t 2018/01:21:15:08:04

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.518579,-0.784379,-0.340330

 which is     R.A. +303.470 Decl. -19.897

 missing      R.A. +303.535 Decl. -19.883 (ibex-sun)

 error is     R.A.   +0.065 Decl.  +0.014

 for a total  0.063 deg

ibex_rotate -o -r +303.470 -d -19.897 -w ibex-sun -t 2018/01:25:12:29:27

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.518579,-0.784379,-0.340330

 which is     R.A. +303.470 Decl. -19.897

 missing      R.A. +307.559 Decl. -18.940 (ibex-sun)

 error is     R.A.   +4.089 Decl.  +0.957

 for a total  3.973 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 395 apogee:

ibex_rotate -o -u  0.538574,-0.769221,-0.343856 -w ibex-sun -t 2018/01:25:14:37:22

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.538574,-0.769221,-0.343856

 which is     R.A. +304.998 Decl. -20.112

 missing      R.A. +307.654 Decl. -18.919 (ibex-sun)

 error is     R.A.   +2.656 Decl.  +1.193

 for a total  2.773 deg

ibex_rotate -o -u  0.538574,-0.769221,-0.343856 -w ibex-sun -t 2018-01-30T13:13:13.228Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.538574,-0.769221,-0.343856

 which is     R.A. +304.998 Decl. -20.112

 missing      R.A. +312.838 Decl. -17.650 (ibex-sun)

 error is     R.A.   +7.840 Decl.  +2.462

 for a total  7.815 deg

No Lo O-mode.

There is no overlap with orbit 393 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken