|Abstract: ||Methods and apparatus for a structure function monitor provide for
generation of parameters characterizing a refractive medium. In an
embodiment, a structure function monitor acquires images of a pupil plane
and an image plane and, from these images, retrieves the phase over an
aperture, unwraps the retrieved phase, and analyzes the unwrapped
retrieved phase. In an embodiment, analysis yields atmospheric parameters
measured at spatial scales from zero to the diameter of a telescope used
to collect light from a source.