Patent ID: 8345115

Claim:
A refractivity profiling system, comprising: an image capturing device for capturing an image of a visual feature; a lens having a focal length adapted to focus an image onto said image capturing device such that a combination of said lens and said image capturing device is adapted to resolve at least 100 microradians of angle; an image processor adapted to compare a detected position of said visual feature of said image to an expected position of said visual feature to detect a change in arrival angle caused by atmospheric refraction of air between the refractivity profiling system and said visual feature; an inertial navigation device providing an orientation data of the refractivity profiling system relative to said visual feature; and a global positioning system data providing a position of the refractivity profiling system relative to said visual feature; wherein said image processor is adapted to process said global positioning system data and said orientation data to query a geographic information system source for a location of said visual feature, and wherein said image processor is adapted to compute an expected position of said visual feature.