Satellite Earth Stations and Systems (SES);Receive-Only Mobile Earth Stations (ROMES)operating in the 1,5 GHz bandproviding data communications;Radio Frequency (RF) specifications ---摘自 ETS 300 487 倾向于工作在1.5GHz的GPS 选择这个标准, 除此频率外的GPS(MS现在没其他频段的) 可以选择EN 300 440