Comment by shagie

There is one. It is the sun synchronous dawn/dusk orbit.

https://en.wikipedia.org/wiki/Sun-synchronous_orbit

> Special cases of the Sun-synchronous orbit are the noon/midnight orbit, where the local mean solar time of passage for equatorial latitudes is around noon or midnight, and the dawn/dusk orbit, where the local mean solar time of passage for equatorial latitudes is around sunrise or sunset, so that the satellite rides the terminator between day and night.

The dawn dusk orbit is in constant sunlight. The noon-midnight orbit isn't.

Those orbits (and their corresponding constellations) lack 100% availability for a ground station.

Furthermore, a polar orbit launch is quite a bit more expensive since it requires a significant change in inclination.