ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

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

IBEX_2016_238_o0338a_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_238_o0338a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts about 1 hour after perigee and runs for about 7 1/4 hours.  No despinning should be required due to this outage.

There is one moon in Lo FOV session in arc A.  The OEF does not have the session start and stop commands - probably because it's a very short session - just over 1 hour.

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

IBEX_Orbit338_Contacts.txt,

for all contacts (3).

No battery cell balancing this orbit; we'll do it again in the next orbit.

The inertial maneuver at perigee of orbit 337 left us pointing in safe directions for the orbit 338 arc A ascending and descending sequences:

ibex_rotate -o -u -0.870501,0.455319,0.18685 -w ibex-sun -t 2016/08:26:09:07:32
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. +155.227 Decl. +10.277 (ibex-sun)
error is R.A. +2.839 Decl. +0.492
for a total 2.834 deg

ibex_rotate -o -u -0.870501,0.455319,0.18685 -w ibex-sun -t 2016/08:29:21:10:22
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. +158.372 Decl. +9.044 (ibex-sun)
error is R.A. +5.984 Decl. +1.725
for a total 6.142 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 -0.904707,0.394862,0.159967 -w ibex-sun -t 2016/08:29:22:53:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.904707,+0.394862,+0.159967
which is R.A. +156.421 Decl. +9.205
missing R.A. +158.438 Decl. +9.019 (ibex-sun)
error is R.A. +2.017 Decl. +0.186
for a total 2.000 deg

ibex_rotate -o -u -0.904707,0.394862,0.159967 -w ibex-sun -t 2016/08:30:00:28:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.904707,+0.394862,+0.159967
which is R.A. +156.421 Decl. +9.205
missing R.A. +158.499 Decl. +8.995 (ibex-sun)
error is R.A. +2.078 Decl. +0.210
for a total 2.062 deg

ibex_rotate -o -u -0.904707,0.394862,0.159967 -w ibex-sun -t 2016/09:03:09:01:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.904707,+0.394862,+0.159967
which is R.A. +156.421 Decl. +9.205
missing R.A. +162.557 Decl. +7.424 (ibex-sun)
error is R.A. +6.136 Decl. +1.781
for a total 6.327 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 339 apogee:

ibex_rotate -o -u -0.934776,0.329645,0.132395 -w ibex-sun -t 2016/09:03:11:13:34
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. +162.640 Decl. +7.389 (ibex-sun)
error is R.A. +2.065 Decl. +0.219
for a total 2.059 deg

ibex_rotate -o -u -0.934776,0.329645,0.132395 -w ibex-sun -t 2016-09-08T06:55:35.303Z
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. +166.873 Decl. +5.594 (ibex-sun)
error is R.A. +6.298 Decl. +2.014
for a total 6.572 deg

No Lo O-mode.

There is no overlap with orbit 337 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken