IBEX_2017_171_o0371a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_171_o0371a_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 and 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,

IBEX_2017_171_o0371a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts about 3 1/2 hours before perigee and runs for about 5 hours.  No despinning should be required due to this outage.

There is a short moon in Lo FOV session in the OEF but it does not appear in the ATS.  (If it had, it would have been considered too short and would have been ignored.)

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

IBEX_Orbit371_Contacts.txt,

for all contacts (2).

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 370 left us pointing in safe directions for the orbit 371 arc A ascending and descending sequences:

ibex_rotate -o -u 0.049157,0.920145,0.388481 -w ibex-sun -t 2017/06:21:07:04:56

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.049157,+0.920145,+0.388481

 which is     R.A.  +86.942 Decl. +22.860

 missing      R.A.  +89.824 Decl. +23.417 (ibex-sun)

 error is     R.A.   +2.882 Decl.  +0.557

 for a total  2.708 deg

ibex_rotate -o -u 0.049157,0.920145,0.388481 -w ibex-sun -t 2017/06:24:22:04:51

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.049157,+0.920145,+0.388481

 which is     R.A.  +86.942 Decl. +22.860

 missing      R.A.  +93.659 Decl. +23.365 (ibex-sun)

 error is     R.A.   +6.717 Decl.  +0.505

 for a total  6.198 deg

The inertial 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 -0.026022,0.921245,0.388111 -w ibex-sun -t 2017/06:24:23:47:59

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.026022,+0.921245,+0.388111

 which is     R.A.  +91.618 Decl. +22.837

 missing      R.A.  +93.735 Decl. +23.364 (ibex-sun)

 error is     R.A.   +2.117 Decl.  +0.527

 for a total  2.017 deg

ibex_rotate -o -u -0.026022,0.921245,0.388111 -w ibex-sun -t 2017/06:25:01:23:05

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.026022,+0.921245,+0.388111

 which is     R.A.  +91.618 Decl. +22.837

 missing      R.A.  +93.805 Decl. +23.363 (ibex-sun)

 error is     R.A.   +2.187 Decl.  +0.526

 for a total  2.079 deg

ibex_rotate -o -u -0.026022,0.921245,0.388111 -w ibex-sun -t 2017/06:29:12:00:14

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.026022,+0.921245,+0.388111

 which is     R.A.  +91.618 Decl. +22.837

 missing      R.A.  +98.417 Decl. +23.233 (ibex-sun)

 error is     R.A.   +6.799 Decl.  +0.396

 for a total  6.269 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 372 apogee:

ibex_rotate -o -u -0.103638,0.916298,0.386856 -w ibex-sun -t 2017/06:29:14:11:34

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.103638,+0.916298,+0.386856

 which is     R.A.  +96.453 Decl. +22.759

 missing      R.A.  +98.506 Decl. +23.227 (ibex-sun)

 error is     R.A.   +2.053 Decl.  +0.468

 for a total  1.947 deg

ibex_rotate -o -u -0.103638,0.916298,0.386856 -w ibex-sun -t 2017-07-04T12:17:26.543Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.103638,+0.916298,+0.386856

 which is     R.A.  +96.453 Decl. +22.759

 missing      R.A. +103.580 Decl. +22.827 (ibex-sun)

 error is     R.A.   +7.127 Decl.  +0.068

 for a total  6.570 deg

No Lo O-mode.

There is no overlap with orbit 370 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken