Patent ID: 7746274

Claim:
A Global Positioning System (GPS), comprising: a first GPS receiver having a Radio Frequency (RF) section, the RF section adaptable to receive at least one GPS signal from at least one GPS satellite; and a baseband section, coupled to the RF section, wherein the baseband section performs calculations to determine a geoposition of the GPS receiver based on the at least one GPS signal, wherein the baseband section further comprises a Pseudo Noise (PN) output, wherein the PN output is combined with additional data to create a ranging signal and the ranging signal is transmitted by the GPS receiver; a plurality of additional GPS receivers to the first GPS receiver; wherein transmission of the ranging signal is selectively activated based upon a request from at least one of the additional GPS receivers; and wherein the first GPS receiver determines a geoposition of the first GPS receiver, and at least one of the plurality GPS receivers receives the geoposition of the first GPS receiver to determine a geoposition of the at least one of the plurality of GPS receivers.