Process for improving continuity in a system of satellite navigation dual frequency

摘要

A method for processing an alarm message has been generated and transmitted by means of a process for improving continuity in a system of satellite navigation dual frequency, in which the procedure to improve continuity in the system of satellite navigation double frequency has the following steps: - observing the ionosphere by measurements in two or more frequency bands (S10), and - transmitting the alarm message informing systems use on a variation of the ionosphere when a measurement results in a variation of the ionosphere which differs (S12) of one or more predetermined conditions, in which the procedure for processing the alarm message has the following steps: - receiving the alarm message has been transmitted with the procedure to improve continuity in the satellite navigation system dual frequency - acquire information CONTENT to the alarm message on a change of the ionosphere, and - calculating the influencing of a position determination by the variation of the ionosphere, characterized in that the procedure for processing the alarm message is performed by a receiver for satellite signals a navigation system satellite dual-frequency, wherein the receiver receives first two measurement signals at two different frequencies and then loses one of the measurement signals, so that is still available only one of the two signals measurement, and the receiver uses for position determination, the time delay ionospheric signal propagation measurement finally acquired from the measurement frequency doubled, in which the procedure for processing the alarm message further comprises the step of: deciding whether the delay time ionospheric propagation finally acquired from the measurement signal It can be used for compensation of the influence of the ionosphere by varying the ionosphere received in the alarm message.