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Nov 27, 2018 at 16:48 comment added uhoh Oh, I did it again. I don't know why but I have some neural circuit that always shunts me over to sun-synchronous whenever I see J2. Cleaning up and rethinking in the morning.
Nov 27, 2018 at 15:07 comment added David Hammen You're thinking of sun synchronous satellites, @uhoh. The nodal precession rate varies with inclination, semi-major axis, and eccentricity. Molniya orbits are chosen so as to have the satellites make two orbits per day and to have the nodal precession make the orbits frozen with respect to ECEF.
Nov 27, 2018 at 7:56 history answered David Hammen CC BY-SA 4.0