IBEX_2017_281_o0383a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_281_o0383a_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_2017_281_o0383a_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_2017_281_o0383a_v001.oef,

and as verified with ibex_orbit.

There are no star tracker outages.

The is one moon in Lo FOV session (there are 2 in the OEF; only 1 in the ATS).  The session starts in arc A and ends after we descend at the end of the arc (in the ATS).  The ATS start time is almost 10 hours after that in the OEF and the ATS end time is almost 5 hours after that in the OEF (the ATS end time is after the arc A descending sequence).  Differences in timing are not unusual.

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

IBEX_Orbit383_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 382 left us pointing in safe directions for the orbit 383 arc A ascending and descending sequences:

ibex_rotate -o -u -0.9737,-0.20512,-0.099163 -w ibex-sun -t 2017/10:09:10:00:49

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.973700,-0.205120,-0.099163

 which is     R.A. +191.896 Decl.  -5.691

 missing      R.A. +194.804 Decl.  -6.340 (ibex-sun)

 error is     R.A.   +2.908 Decl.  +0.649

 for a total  2.964 deg

ibex_rotate -o -u -0.9737,-0.20512,-0.099163 -w ibex-sun -t 2017/10:13:03:02:47

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.973700,-0.205120,-0.099163

 which is     R.A. +191.896 Decl.  -5.691

 missing      R.A. +198.102 Decl.  -7.700 (ibex-sun)

 error is     R.A.   +6.206 Decl.  +2.009

 for a total  6.483 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 -0.952261,-0.275828,-0.130838 -w ibex-sun -t 2017/10:13:04:45:55

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.952261,-0.275828,-0.130838

 which is     R.A. +196.154 Decl.  -7.518

 missing      R.A. +198.168 Decl.  -7.725 (ibex-sun)

 error is     R.A.   +2.014 Decl.  +0.207

 for a total  2.007 deg

ibex_rotate -o -u -0.952261,-0.275828,-0.130838 -w ibex-sun -t 2017/10:13:06:21:01

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.952261,-0.275828,-0.130838

 which is     R.A. +196.154 Decl.  -7.518

 missing      R.A. +198.229 Decl.  -7.749 (ibex-sun)

 error is     R.A.   +2.075 Decl.  +0.231

 for a total  2.070 deg

ibex_rotate -o -u -0.952261,-0.275828,-0.130838 -w ibex-sun -t 2017/10:17:19:30:11 

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.952261,-0.275828,-0.130838

 which is     R.A. +196.154 Decl.  -7.518

 missing      R.A. +202.592 Decl.  -9.431 (ibex-sun)

 error is     R.A.   +6.438 Decl.  +1.913

 for a total  6.649 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 384 apogee:

ibex_rotate -o -u -0.924721,-0.345408,-0.15995 -w ibex-sun -t 2017/10:17:22:08:28

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.924721,-0.345408,-0.159950

 which is     R.A. +200.482 Decl.  -9.204

 missing      R.A. +202.700 Decl.  -9.476 (ibex-sun)

 error is     R.A.   +2.218 Decl.  +0.272

 for a total  2.206 deg

ibex_rotate -o -u -0.924721,-0.345408,-0.15995 -w ibex-sun -t 2017-10-22T20:40:50.842Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.924721,-0.345408,-0.159950

 which is     R.A. +200.482 Decl.  -9.204

 missing      R.A. +207.223 Decl. -11.238 (ibex-sun)

 error is     R.A.   +6.741 Decl.  +2.034

 for a total  6.938 deg

No Lo O-mode.

There is no overlap with orbit 382 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken