IBEX_2016_029_o0315a_v001.scr,

and I approve.

There are no constraint violations in

IBEX_2016_029_o0315a_v001.ccvr.

The PL commands in the v001 ATS match those in the v003 STF,

IBEX_2016_029_o0315a_v003.stf,

except that the ATS has an SSR_DUMP_NEW command.  This is expected as APL is being used for the dump pass.

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_029_o0315a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  It starts about 12 hours before apogee and runs for 3+ days.  Some despinning may be required due to this outage.

There is one moon in Lo FOV session in arc B.  The ATS start time is about 2 hours before that in the OEF and the ATS end time is 5 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_Orbit315_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 314 left us pointing in safe directions for the orbit 315 arc A ascending and descending sequences:

ibex_rotate -o -u  0.630752,-0.668145,-0.394632 -w ibex-sun -t 2016/01:29:17:27:29

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.630752,-0.668145,-0.394632

 which is     R.A. +313.351 Decl. -23.243

 missing      R.A. +311.488 Decl. -18.006 (ibex-sun)

 error is     R.A.   +1.863 Decl.  +5.237

 for a total  5.520 deg

ibex_rotate -o -u  0.630752,-0.668145,-0.394632 -w ibex-sun -t 2016/02:02:14:49:42

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.630752,-0.668145,-0.394632

 which is     R.A. +313.351 Decl. -23.243

 missing      R.A. +315.461 Decl. -16.946 (ibex-sun)

 error is     R.A.   +2.110 Decl.  +6.297

 for a total  6.601 deg

The sun 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 -r +315.536 -d -16.924 -w ibex-sun -t 2016/02:02:16:37:50

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.682782,-0.670125,-0.291103

 which is     R.A. +315.536 Decl. -16.924

 missing      R.A. +315.536 Decl. -16.924 (ibex-sun)

 error is     R.A.   +0.000 Decl.  +0.000

 for a total  0.000 deg

ibex_rotate -o -r +315.536 -d -16.924 -w ibex-sun -t 2016/02:02:18:07:56

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.682782,-0.670125,-0.291103

 which is     R.A. +315.536 Decl. -16.924

 missing      R.A. +315.598 Decl. -16.906 (ibex-sun)

 error is     R.A.   +0.062 Decl.  +0.018

 for a total  0.062 deg

ibex_rotate -o -r +315.536 -d -16.924 -w ibex-sun -t 2016/02:06:15:28:33

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.682782,-0.670125,-0.291103

 which is     R.A. +315.536 Decl. -16.924

 missing      R.A. +319.462 Decl. -15.720 (ibex-sun)

 error is     R.A.   +3.926 Decl.  +1.204

 for a total  3.955 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 316 apogee:

ibex_rotate -o -u 0.743979,-0.568362,-0.351368 -w ibex-sun -t 2016/02:06:17:28:12

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.743979,-0.568362,-0.351368

 which is     R.A. +322.622 Decl. -20.571

 missing      R.A. +319.547 Decl. -15.694 (ibex-sun)

 error is     R.A.   +3.075 Decl.  +4.877

 for a total  5.685 deg

ibex_rotate -o -u 0.743979,-0.568362,-0.351368 -w ibex-sun -t 2016-02-11T14:00:20.916Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.743979,-0.568362,-0.351368

 which is     R.A. +322.622 Decl. -20.571

 missing      R.A. +324.464 Decl. -14.175 (ibex-sun)

 error is     R.A.   +1.842 Decl.  +6.396

 for a total  6.633 deg

Lo O-mode in arc A (plan 6,7,1,1).  O-mode timing matches that specified in the ISN season memo.  There is more than 1 hour between the end of the ascending sequence and the start of O-mode and also more than an hour after O-mode ends and the start of the descending sequence.

There is no overlap with orbit 314 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken