IBEX_2017_027_o0355a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_027_o0355a_v001.ccvr

are due to the eclipse and because we removed the

ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

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

IBEX_2017_027_o0355a_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_2017_027_o0355a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts 9 hours before apogee and runs for almost 3 1/2 days.  Some despinning may be required due to this outage.

There is one moon in Lo FOV session in arc A.  The ATS start time is an hour after that in the OEF.  The session ends so soon after the apogee ascending sequence that there is no start/stop sequence in the ATS.  The difference in the start times is not unusual.

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

IBEX_Orbit355_Contacts.txt,

for all contacts (3).

The long eclipse flag on/off command timing matches Ryan's recommendations for the perigee eclipse.  The commands are offset by enough time from the maneuver and the descending sequence.

The inertial maneuver at perigee of orbit 354 left us pointing in safe directions for the orbit 355 arc A ascending and descending sequences:

ibex_rotate -o -u 0.621391,-0.675047,-0.397724 -w ibex-sun -t 2017/01:28:06:57:03

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.621391,-0.675047,-0.397724

 which is     R.A. +312.630 Decl. -23.436

 missing      R.A. +310.769 Decl. -18.195 (ibex-sun)

 error is     R.A.   +1.861 Decl.  +5.241

 for a total  5.522 deg

ibex_rotate -o -u 0.621391,-0.675047,-0.397724 -w ibex-sun -t 2017/01:31:21:30:47

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.621391,-0.675047,-0.397724

 which is     R.A. +312.630 Decl. -23.436

 missing      R.A. +314.486 Decl. -17.219 (ibex-sun)

 error is     R.A.   +1.856 Decl.  +6.217

 for a total  6.456 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 0.684435,-0.665305,-0.298191 -w ibex-sun -t 2017/01:31:23:13:55

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.684435,-0.665305,-0.298191

 which is     R.A. +315.812 Decl. -17.349

 missing      R.A. +314.558 Decl. -17.198 (ibex-sun)

 error is     R.A.   +1.254 Decl.  +0.151

 for a total  1.207 deg

ibex_rotate -o -u 0.684435,-0.665305,-0.298191 -w ibex-sun -t 2017/02:01:00:49:01

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.684435,-0.665305,-0.298191

 which is     R.A. +315.812 Decl. -17.349

 missing      R.A. +314.624 Decl. -17.179 (ibex-sun)

 error is     R.A.   +1.188 Decl.  +0.170

 for a total  1.147 deg

ibex_rotate -o -u 0.684435,-0.665305,-0.298191 -w ibex-sun -t 2017/02:05:11:25:40

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.684435,-0.665305,-0.298191

 which is     R.A. +315.812 Decl. -17.349

 missing      R.A. +319.037 Decl. -15.843 (ibex-sun)

 error is     R.A.   +3.225 Decl.  +1.506

 for a total  3.438 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 356 apogee:

ibex_rotate -o -u 0.738917,-0.573494,-0.353703 -w ibex-sun -t 2017/02:05:13:43:12

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.738917,-0.573494,-0.353703

 which is     R.A. +322.184 Decl. -20.714

 missing      R.A. +319.135 Decl. -15.815 (ibex-sun)

 error is     R.A.   +3.048 Decl.  +4.899

 for a total  5.690 deg

ibex_rotate -o -u 0.738917,-0.573494,-0.353703 -w ibex-sun -t 2017-02-10T15:04:00.358Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.738917,-0.573494,-0.353703

 which is     R.A. +322.184 Decl. -20.714

 missing      R.A. +324.263 Decl. -14.236 (ibex-sun)

 error is     R.A.   +2.079 Decl.  +6.478

 for a total  6.775 deg

No Lo O-mode.

There is no overlap with orbit 354 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken