[oliv5900]

https://en.wikipedia.org/wiki/Sun-synchronous_orbit A Sun Synchronous orbit at the Day-Night terminator solves this issue

[elihu]

Huh, I didn't know that that was possible without burning fuel. Kind of wild that it only works because the Earth has an equatorial bulge and isn't an exact sphere.

[WalterBright]

I didn't think of that! I should have had a V8. Thanks for the info.