IBEX_2016_083_o0321a_Recovery_v001.scr,

and I approve.

The only constraint violations in

IBEX_2016_083_o0321a_Recovery_v001.ccvr

are because we removed the

ACT_SetSpinPulseProtectEnable Enable

commands; the violations are expected.

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

IBEX_2016_083_o0321a_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_083_o0321a_Recovery_v001.oef,

and as verified with ibex_orbit.

There are two star tracker outages.  The first starts before 15 Re ascending and ends 1+ days after apogee.  The second starts 1 1/2 days after the first outage ends and ends 1+ day later.  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 hour before that in the OEF and the ATS end time is the same as that in the OEF.  Differences in the times are not unusual.

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

IBEX_Orbit321_RecoveryContacts.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 sun precession maneuver at perigee of orbit 320 left us pointing in safe directions for the orbit 321 arc A ascending and descending sequences:

ibex_rotate -o -r +2.246 -d +0.991 -w ibex-sun -t 2016/03:23:18:35:21

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.999082,+0.039184,+0.017295

 which is     R.A.   +2.246 Decl.  +0.991

 missing      R.A.   +3.075 Decl.  +1.319 (ibex-sun)

 error is     R.A.   +0.829 Decl.  +0.328

 for a total  0.891 deg

ibex_rotate -o -r +2.246 -d +0.991 -w ibex-sun -t 2016/03:27:17:46:27

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.999082,+0.039184,+0.017295

 which is     R.A.   +2.246 Decl.  +0.991

 missing      R.A.   +6.775 Decl.  +2.895 (ibex-sun)

 error is     R.A.   +4.529 Decl.  +1.904

 for a total  4.910 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 +6.843 -d +2.924 -w ibex-sun -t 2016/03:27:19:34:35

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.991584,+0.118994,+0.051011

 which is     R.A.   +6.843 Decl.  +2.924

 missing      R.A.   +6.843 Decl.  +2.924 (ibex-sun)

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

 for a total  0.000 deg

ibex_rotate -o -r +6.843 -d +2.924 -w ibex-sun -t 2016/03:27:21:04:41

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.991584,+0.118994,+0.051011

 which is     R.A.   +6.843 Decl.  +2.924

 missing      R.A.   +6.899 Decl.  +2.949 (ibex-sun)

 error is     R.A.   +0.056 Decl.  +0.025

 for a total  0.061 deg

ibex_rotate -o -r +6.843 -d +2.924 -w ibex-sun -t 2016/03:31:20:23:19

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.991584,+0.118994,+0.051011

 which is     R.A.   +6.843 Decl.  +2.924

 missing      R.A.  +10.390 Decl.  +4.488 (ibex-sun)

 error is     R.A.   +3.547 Decl.  +1.564

 for a total  3.869 deg

The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 322 apogee:

ibex_rotate -o -r +10.481 -d +4.526 -w ibex-sun -t 2016/03:31:22:52:17

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.980249,+0.181342,+0.078911

 which is     R.A.  +10.481 Decl.  +4.526

 missing      R.A.  +10.481 Decl.  +4.526 (ibex-sun)

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

 for a total  0.000 deg

ibex_rotate -o -r +10.481 -d +4.526 -w ibex-sun -t 2016-04-05T20:29:22.112Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.980249,+0.181342,+0.078911

 which is     R.A.  +10.481 Decl.  +4.526

 missing      R.A.  +15.089 Decl.  +6.406 (ibex-sun)

 error is     R.A.   +4.608 Decl.  +1.880

 for a total  4.957 deg

No Lo O-mode.

There is no overlap with orbit 320 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken