IBEX_2023_354_o0632a_v001.scr,

IBEX_2023_354_o0632a_v001.ccvr

IBEX_2023_354_o0632a_v002.stf.

Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,

IBEX_2023_354_o0632a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts 10 hours after apogee and runs for 2.5+ days.  Some despinning may be required due to this outage.

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

IBEX_Orbit632_Contacts.txt,

for all contacts (4).

We are doing battery cell balancing and the balancing commands are correct and offset by enough time from other commands.

The inertial precession maneuver at perigee of orbit 631 leaves us pointing in safe directions for the orbit 632 arc A ascending and descending sequences:

ibex_rotate -o -u -0.01682,-0.913355,-0.406816 -w ibex-sun -t 2023/12:20:20:27:34

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.016820,-0.913355,-0.406816

 which is     R.A. +268.945 Decl. -24.005

 missing      R.A. +268.241 Decl. -23.446 (ibex-sun)

 error is     R.A.   +0.704 Decl.  +0.559

 for a total  0.853 deg

ibex_rotate -o -u -0.01682,-0.913355,-0.406816 -w ibex-sun -t 2023/12:24:12:45:07

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  -0.016820,-0.913355,-0.406816

 which is     R.A. +268.945 Decl. -24.005

 missing      R.A. +272.362 Decl. -23.404 (ibex-sun)

 error is     R.A.   +3.417 Decl.  +0.601

 for a total  3.185 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 0.065365,-0.911893,-0.405189 -w ibex-sun -t 2023/12:24:14:28:15

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.065365,-0.911893,-0.405189

 which is     R.A. +274.100 Decl. -23.903

 missing      R.A. +272.440 Decl. -23.402 (ibex-sun)

 error is     R.A.   +1.660 Decl.  +0.501

 for a total  1.601 deg

ibex_rotate -o -u 0.065365,-0.911893,-0.405189 -w ibex-sun -t 2023/12:24:16:03:21

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.065365,-0.911893,-0.405189

 which is     R.A. +274.100 Decl. -23.903

 missing      R.A. +272.512 Decl. -23.400 (ibex-sun)

 error is     R.A.   +1.588 Decl.  +0.503

 for a total  1.539 deg

ibex_rotate -o -u 0.065365,-0.911893,-0.405189 -w ibex-sun -t 2023/12:29:04:36:31

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.065365,-0.911893,-0.405189

 which is     R.A. +274.100 Decl. -23.903

 missing      R.A. +277.420 Decl. -23.244 (ibex-sun)

 error is     R.A.   +3.320 Decl.  +0.659

 for a total  3.114 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 633 apogee:

ibex_rotate -o -u 0.148078,-0.903368,-0.402491 -w ibex-sun -t 2023/12:29:06:57:49

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.148078,-0.903368,-0.402491

 which is     R.A. +279.309 Decl. -23.734

 missing      R.A. +277.531 Decl. -23.242 (ibex-sun)

 error is     R.A.   +1.778 Decl.  +0.492

 for a total  1.704 deg

ibex_rotate -o -u 0.148078,-0.903368,-0.402491 -w ibex-sun -t 2024-01-03T05:32:48.665Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.148078,-0.903368,-0.402491

 which is     R.A. +279.309 Decl. -23.734

 missing      R.A. +283.101 Decl. -22.870 (ibex-sun)

 error is     R.A.   +3.792 Decl.  +0.864

 for a total  3.589 deg

Lo Normal mode for the entire orbit.

There is no overlap with orbit 631 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken