1. A moving imager camera comprising: a positioning mechanism having a mounting surface capable of motion along two degrees of freedom; an imaging device having an imaging surface, the imaging device being mounted upon the mounting surface of the positioning mechanism such that the imaging device moves in concert with motion of the mounting surface of the positioning mechanism; a measurement system operable to determine a position of the imaging device within an external frame of reference defined by an azimuth axis and an elevation axis; and a spherical lens having a spherical focal surface and a field of coverage, the spherical lens arranged such that the spherical focal surface coincides with the imaging surface of the imaging device, the field of coverage of the spherical lens being larger than an optically sensitive area of the imaging surface.