# ellipsoid2d¶

typhon.geodesy.ellipsoid2d(ellipsoid, orbitinc)[source]

Approximate ellipsoid for 2D calculations.

Determines an approximate reference ellipsoid following an orbit track. The new ellipsoid is determined simply, by determining the radius at the maximum latitude and from this value calculate a new eccentricity. The orbit is specified by giving the orbit inclination, that is normally a value around 100 deg for polar sun-synchronous orbits.

Parameters: ellipsoid (tuple) – Model ellipsoid as returned by ellipsoidmodels. orbitinc (float) – Orbit inclination. Modified ellipsoid vector. tuple