Orbit Half in
Half Out of
Sunlight on
Solstice
Dec 21
Satellites in Polar Orbit Will Have a Near
Dawn-Dusk Orbit Only On Equinoxes
March 21
Dawn to Dusk
Orbit on
Equinox
POES orbit
with no
precession
Sept 21
Dawn to Dusk
Orbit on
Equinox
June 22
Orbit Half in
Half Out of
Sunlight on
Solstice