IBEX_2017_009_o0353a_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_009_o0353a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts 2- days before apogee and ends 2+ days after apogee.  Some despinning may be required due to this 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_Orbit353_Contacts.txt,

for all contacts (2).

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 352 left us pointing in safe directions for the orbit 353 arc A ascending and descending sequences:

ibex_rotate -o -u 0.332629,-0.822377,-0.461578 -w ibex-sun -t 2017/01:09:12:20:54

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.332629,-0.822377,-0.461578

 which is     R.A. +292.022 Decl. -27.489

 missing      R.A. +290.828 Decl. -22.074 (ibex-sun)

 error is     R.A.   +1.194 Decl.  +5.415

 for a total  5.522 deg

ibex_rotate -o -u 0.332629,-0.822377,-0.461578 -w ibex-sun -t 2017/01:13:16:43:23

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.332629,-0.822377,-0.461578

 which is     R.A. +292.022 Decl. -27.489

 missing      R.A. +295.320 Decl. -21.428 (ibex-sun)

 error is     R.A.   +3.298 Decl.  +6.061

 for a total  6.763 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 +295.399 -d -21.414 -w ibex-sun -t 2017/01:13:18:31:31

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.399310,-0.840982,-0.365104

 which is     R.A. +295.399 Decl. -21.414

 missing      R.A. +295.399 Decl. -21.414 (ibex-sun)

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

 for a total  0.000 deg

ibex_rotate -o -r +295.399 -d -21.414 -w ibex-sun -t 2017/01:13:20:01:37

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.399310,-0.840982,-0.365104

 which is     R.A. +295.399 Decl. -21.414

 missing      R.A. +295.465 Decl. -21.403 (ibex-sun)

 error is     R.A.   +0.066 Decl.  +0.011

 for a total  0.063 deg

ibex_rotate -o -r +295.399 -d -21.414 -w ibex-sun -t 2017/01:18:00:32:56

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.399310,-0.840982,-0.365104

 which is     R.A. +295.399 Decl. -21.414

 missing      R.A. +299.915 Decl. -20.573 (ibex-sun)

 error is     R.A.   +4.516 Decl.  +0.841

 for a total  4.299 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 354 apogee:

ibex_rotate -o -u 0.485271,-0.759002,-0.434084 -w ibex-sun -t 2017/01:18:02:54:50

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.485271,-0.759002,-0.434084

 which is     R.A. +302.593 Decl. -25.727

 missing      R.A. +300.025 Decl. -20.553 (ibex-sun)

 error is     R.A.   +2.568 Decl.  +5.174

 for a total  5.687 deg

ibex_rotate -o -u 0.485271,-0.759002,-0.434084 -w ibex-sun -t 2017-01-23T03:56:59.884Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.485271,-0.759002,-0.434084

 which is     R.A. +302.593 Decl. -25.727

 missing      R.A. +305.416 Decl. -19.486 (ibex-sun)

 error is     R.A.   +2.823 Decl.  +6.241

 for a total  6.763 deg

No Lo O-mode.

There is no overlap with orbit 352 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken