ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

The PL commands in the v002 ATS match those in the v003 STF,

IBEX_2016_230_o0337a_v003.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_230_o0337a_v001.oef,

and as verified with ibex_orbit.

There are two star tracker outages.  The first starts 10 1/2 hours after orbit 336 perigee and ends 13 hours later.  The second starts just after perigee and runs for about 6 1/2 hours.  Some despinning may be required due to the first outage.

There is one moon in Lo FOV session in arc B.  The ATS start time is 9 1/2 hours after that in the OEF (however, during this time the arc A descending sequence, the apogee maneuver and the arc B ascending sequence are executed).  The ATS end time is 4 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_Orbit337_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 336 left us pointing in safe directions for the orbit 337 arc A ascending and descending sequences:

ibex_rotate -o -u -0.788417,0.568164,0.23577 -w ibex-sun -t 2016/08:17:13:08:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.788417,+0.568164,+0.235770
which is R.A. +144.222 Decl. +13.637
missing R.A. +147.076 Decl. +13.240 (ibex-sun)
error is R.A. +2.854 Decl. +0.397
for a total 2.804 deg

ibex_rotate -o -u -0.788417,0.568164,0.23577 -w ibex-sun -t 2016/08:20:23:24:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.788417,+0.568164,+0.235770
which is R.A. +144.222 Decl. +13.637
missing R.A. +150.221 Decl. +12.116 (ibex-sun)
error is R.A. +5.999 Decl. +1.521
for a total 6.042 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 -0.83106,0.514296,0.211751 -w ibex-sun -t 2016/08:21:01:08:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831060,+0.514296,+0.211751
which is R.A. +148.249 Decl. +12.225
missing R.A. +150.288 Decl. +12.093 (ibex-sun)
error is R.A. +2.039 Decl. +0.132
for a total 1.998 deg

ibex_rotate -o -u -0.83106,0.514296,0.211751 -w ibex-sun -t 2016/08:21:02:43:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831060,+0.514296,+0.211751
which is R.A. +148.249 Decl. +12.225
missing R.A. +150.350 Decl. +12.071 (ibex-sun)
error is R.A. +2.101 Decl. +0.154
for a total 2.060 deg

ibex_rotate -o -u -0.83106,0.514296,0.211751 -w ibex-sun -t 2016/08:25:09:08:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831060,+0.514296,+0.211751
which is R.A. +148.249 Decl. +12.225
missing R.A. +154.374 Decl. +10.638 (ibex-sun)
error is R.A. +6.125 Decl. +1.587
for a total 6.209 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 338 apogee:

ibex_rotate -o -u -0.870501,0.455319,0.18685 -w ibex-sun -t 2016/08:25:11:16:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.870501,+0.455319,+0.186850
which is R.A. +152.388 Decl. +10.769
missing R.A. +154.456 Decl. +10.607 (ibex-sun)
error is R.A. +2.068 Decl. +0.162
for a total 2.038 deg

ibex_rotate -o -u -0.870501,0.455319,0.18685 -w ibex-sun -t 2016-08-30T08:41:55.315Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.870501,+0.455319,+0.186850
which is R.A. +152.388 Decl. +10.769
missing R.A. +158.815 Decl. +8.874 (ibex-sun)
error is R.A. +6.427 Decl. +1.895
for a total 6.610 deg

No Lo O-mode.

There is no overlap with orbit 336 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken