1. A navigation satellite tracking method comprising at least once determining one-way range unambiguous observations for each of a set of satellites in view, wherein standard tracking channels are permanently associated to each of the satellites, and wherein determining the one-way range unambiguous observations includes: determining one-way range unambiguous and one-way range ambiguous observations with a nearly-hemispherical antenna at a measurement time (t A ) for each satellite out of the set of satellites in view simultaneously; sequentially determining an additional one-way range unambiguous observation with a directive antenna at respectively different further measurement times (t A +kΔt), wherein: one additional one-way range unambiguous observation is determined for each satellite out of the set of satellites, and additional tracking channels different from the standard tracking channels are used for this sequential determination; sequentially determining an additional one-way range ambiguous observation with the nearly-hemispherical antenna at the further measurement times t A +kΔt for each satellite out of the set of satellites in view; and transforming, satellite per satellite, the additional one-way range unambiguous observations in one-way range unambiguous observations referred to a common future time (t B ), wherein this transformation is achieved by adding to each of the one-way range unambiguous observations the temporal evolution of the one-way range ambiguous observations of the respective satellite.