| 摘要 |
A navigation satellite system, one or more NSS reference station is set out for providing information to one or more rover receivers. The NSS reference station comprises a processing unit configured to determine one or more first range intervals representing first ambiguity windows based on estimated atmospheric effects, and determine one or more second range intervals representing a second ambiguity window smaller than each of the first ambiguity windows based on uncertainties of range measurements within a predetermined previous period. The NSS reference station further comprises a transmission unit configured to transmit, to the NSS rover receivers, first messages each comprising a range measurement modulo a first ambiguity window, and transmit between transmission of two first messages, to the NSS rover receiver, a plurality of second messages, each second message comprising a range measurement modulo one of the second ambiguity windows. |
