1. A method of aerial surveying of electromagnetic signals having a broad frequency spectrum over a large geographical area to reduce the effects of ground scatter interference and signal reflections comprising: flying an airplane over said large geographical area to detect said electromagnetic signals at specific locations traversed by said airplane in said large geographical area; detecting said electromagnetic signals by said airplane using a plurality of antennas that are tuned to a plurality of frequency bands to produce a plurality of frequency band antenna signals from said plurality of antennas; band pass filtering said frequency band antenna signals to produce a plurality of filtered frequency band signals that have different frequency spectra; generating geospatial data relating to said specific locations at which said frequency band antenna signals are detected by determining locations of said airplane when said frequency band antenna signals are detected; digitizing said plurality of filtered frequency band signals to produce digitized frequency band signals; tagging said digitized frequency band signals with said geospatial data; performing vector analysis using a vector signal analyzer on said digitized frequency band signals to provide vector analyzed data regarding said digitized frequency band signals that comprises digital in-phase and quadrature phase data; generating frequency domain data from said digitized frequency band signals; compressing said vector analyzed data and said frequency domain data using video data compression techniques to produce compressed digital band data; storing said compressed digital band data in a mass storage device; analyzing said compressed digital band data stored in said mass storage device to determine spectrum utilization.