IBEX_2017_245_o0379a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_245_o0379a_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_245_o0379a_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_245_o0379a_v001.oef,

and as verified with ibex_orbit.

There are two star tracker outages.  The first starts about 10 hours after 15 Re ascending and runs for 1+ days.  The second starts about 4 hours after perigee and runs for almost 6 hours.  Some despinning may be required due to the first outage.

There are no moon in Lo FOV sessions.

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

IBEX_Orbit379_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 378 left us pointing in safe directions for the orbit 379 arc A ascending and descending sequences:

ibex_rotate -o -u  -0.922547,0.357684,0.144805 -w ibex-sun -t 2017/09:02:15:43:14

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.922547,+0.357684,+0.144805

 which is     R.A. +158.808 Decl.  +8.326

 missing      R.A. +161.628 Decl.  +7.760 (ibex-sun)

 error is     R.A.   +2.820 Decl.  +0.566

 for a total  2.849 deg

ibex_rotate -o -u  -0.922547,0.357684,0.144805 -w ibex-sun -t 2017/09:06:05:56:12

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.922547,+0.357684,+0.144805

 which is     R.A. +158.808 Decl.  +8.326

 missing      R.A. +164.799 Decl.  +6.458 (ibex-sun)

 error is     R.A.   +5.991 Decl.  +1.868

 for a total  6.227 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 -0.949205,0.292648,0.115613 -w ibex-sun -t 2017/09:06:07:39:20

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.949205,+0.292648,+0.115613

 which is     R.A. +162.865 Decl.  +6.639

 missing      R.A. +164.864 Decl.  +6.432 (ibex-sun)

 error is     R.A.   +1.999 Decl.  +0.207

 for a total  1.997 deg

ibex_rotate -o -u -0.949205,0.292648,0.115613 -w ibex-sun -t 2017/09:06:09:14:26

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.949205,+0.292648,+0.115613

 which is     R.A. +162.865 Decl.  +6.639

 missing      R.A. +164.924 Decl.  +6.408 (ibex-sun)

 error is     R.A.   +2.059 Decl.  +0.231

 for a total  2.059 deg

ibex_rotate -o -u -0.949205,0.292648,0.115613 -w ibex-sun -t 2017/09:10:20:22:01

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.949205,+0.292648,+0.115613

 which is     R.A. +162.865 Decl.  +6.639

 missing      R.A. +169.059 Decl.  +4.728 (ibex-sun)

 error is     R.A.   +6.194 Decl.  +1.911

 for a total  6.453 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 380 apogee:

ibex_rotate -o -u -0.970909,0.22326,0.086547 -w ibex-sun -t 2017/09:10:22:55:38

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.970909,+0.223260,+0.086547

 which is     R.A. +167.050 Decl.  +4.965

 missing      R.A. +169.156 Decl.  +4.684 (ibex-sun)

 error is     R.A.   +2.106 Decl.  +0.280

 for a total  2.117 deg

ibex_rotate -o -u -0.970909,0.22326,0.086547 -w ibex-sun -t 2017-09-15T23:46:45.940Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.970909,+0.223260,+0.086547

 which is     R.A. +167.050 Decl.  +4.965

 missing      R.A. +173.545 Decl.  +2.769 (ibex-sun)

 error is     R.A.   +6.495 Decl.  +2.196

 for a total  6.842 deg

No Lo O-mode.

There is no overlap with orbit 378 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken