Other tipologie of Assisted GPS

Since years ' 80 it has been attempted to obviate to the problem from the fixing trying to support the GPS with information that consentissero an express start of the receiver. To some models of receivers GPS, therefore, table with the ephemeres of satellites GPS has been given the possibility to acquire from external sources one. In origin such tables were loaded on the receiver through a connection with a computer; the complexity of such tables, however, limited the support to some days. In the more recent models, as an example in receivers GPS included in smartphone, the tables can be unloaded directly from Internet via GPRS or UMTS.