Inputs: coordinates for the center of the circle, a tilt-angle and an altitude (in meters). Coordinate values need to be in decimal degrees.
(The default values will produce views from an relative altitude of 303 m and a circle through the LookAt points centered around The Eiffel Tower with multiple views from its top at 332m.)
An altitude of approx. 2250000 m is the highest with a tilt of 90 deg. Higher altitudes will not touch earth.