1. A range determiner assembly comprising: an image sensor configured to obtain image data for each of a plurality of views of a target captured at each of a plurality of different locations of the range determiner assembly moving in relation to the target at a determinable altitude above a surface; a detector board comprising at least a first line array, a second line array and a third line array, each of the at least first, second and third line arrays receiving a respective sequence of image data for a corresponding one of the plurality of views; and processing circuitry configured to: determine the locations of the range determiner assembly when the image data is captured; determine angular differences to the target at each of the locations; and determine a relative distance between the range determiner assembly and the target based on the image data, the locations of the ranger determiner assembly when the image data is captured, and the angular differences to the target at each of the locations.