ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

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

IBEX_2016_247_o0339a_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_2016_247_o0339a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts two hours after perigee and ends 7+ hours later.  No despinning should be required due to the outage.

There is one moon in Lo FOV session in arc B.  The ATS start time is an hour after that in the OEF and the ATS end time is about 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_Orbit339_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 338 left us pointing in safe directions for the orbit 339 arc A ascending and descending sequences:

ibex_rotate -o -u -0.934776,0.329645,0.132395 -w ibex-sun -t 2016/09:04:08:55:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.934776,+0.329645,+0.132395
which is R.A. +160.575 Decl. +7.608
missing R.A. +163.401 Decl. +7.042 (ibex-sun)
error is R.A. +2.826 Decl. +0.566
for a total 2.860 deg

ibex_rotate -o -u -0.934776,0.329645,0.132395 -w ibex-sun -t 2016/09:07:19:22:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.934776,+0.329645,+0.132395
which is R.A. +160.575 Decl. +7.608
missing R.A. +166.434 Decl. +5.772 (ibex-sun)
error is R.A. +5.859 Decl. +1.836
for a total 6.102 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 -0.958412,0.265755,0.104025 -w ibex-sun -t 2016/09:07:21:05:35
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.958412,+0.265755,+0.104025
which is R.A. +164.502 Decl. +5.971
missing R.A. +166.500 Decl. +5.746 (ibex-sun)
error is R.A. +1.998 Decl. +0.225
for a total 2.000 deg

ibex_rotate -o -u -0.958412,0.265755,0.104025 -w ibex-sun -t 2016/09:07:22:40:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.958412,+0.265755,+0.104025
which is R.A. +164.502 Decl. +5.971
missing R.A. +166.560 Decl. +5.721 (ibex-sun)
error is R.A. +2.058 Decl. +0.250
for a total 2.062 deg

ibex_rotate -o -u -0.958412,0.265755,0.104025 -w ibex-sun -t 2016/09:12:04:58:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.958412,+0.265755,+0.104025
which is R.A. +164.502 Decl. +5.971
missing R.A. +170.503 Decl. +4.112 (ibex-sun)
error is R.A. +6.001 Decl. +1.859
for a total 6.260 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 340 apogee:

ibex_rotate -o -u -0.97719,0.198474,0.075553 -w ibex-sun -t 2016/09:12:07:08:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.977190,+0.198474,+0.075553
which is R.A. +168.519 Decl. +4.333
missing R.A. +170.585 Decl. +4.076 (ibex-sun)
error is R.A. +2.066 Decl. +0.257
for a total 2.077 deg

ibex_rotate -o -u -0.97719,0.198474,0.075553 -w ibex-sun -t 2016-09-17T02:10:53.952Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.977190,+0.198474,+0.075553
which is R.A. +168.519 Decl. +4.333
missing R.A. +174.762 Decl. +2.237 (ibex-sun)
error is R.A. +6.243 Decl. +2.096
for a total 6.575 deg

No Lo O-mode.

There is no overlap with orbit 338 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken