1. A distributed multi-sensor system for spectrum mapping and signal exploitation, comprising: a plurality of distributed sensors comprising a first set of sensors distributed in a first region and said first set of sensors configured to receive a plurality of non-cooperative non coherent and asynchronous signals, s(t), from an unknown transmission source of interest (SOI), each of said sensors of said first set having a sampling clock and a local memory, and providing a first set of receive signals, and said plurality of distributed sensors further comprising a second set of sensors including a cluster of sensors distributed in a second region and said second set of sensors configured to receive the plurality of non-cooperative non coherent and asynchronous signals, s(t), from the unknown transmission source (SOI), each of said cluster of sensors of said second set having a sampling clock and a local memory, and providing a plurality of received signals; said plurality of distributed sensors being configured to collect timestamped data snapshots of the SOI; a first fusion center disposed in said first region and being configured to receive timestamped signals from said first set of sensors; a second fusion center disposed outside of said first region of distributed sensors and said second region of distributed sensors and being configured to receive timestamped signals from said second set of sensors and at least one of the received signals and information from said first fusion center; said second fusion center further configured to process all signal inputs before sending any next request to said plurality of sensors and to optimize said plurality of sensors; said second fusion center further configured to combine the distributed signal inputs from said plurality of sensors; and said first fusion center, said second fusion center or a combination thereof further configured to make a global decision concerning said sensor signals.