Satellite AIS - developing technology or existing capability?

"The Automatic Identification System (AIS) is an integral element in vessel tracking. But what about 'Satellite AIS'? Is Satellite AIS a viable, current and effective tool to assist in vessel tracking? This paper will present the basic premise of reception of AIS by Low Earth Orbit (LEO) satellites. It will identify the technical aspects, present practical applications of Satellite AIS and look at implications for global tracking of vessels."