An Algorithm of Instantaneous Double Difference Ambiguity Resolution for Long-Range Reference Stations of Network RTK

A new algorithm of instantaneous double difference ambiguity resolution for long-range reference stations of Network RTK is proposed.The wide-lane ambiguity are determined by the linear relationship between double frequency carrier phase ambiguities.Then candidates of double frequency carrier phase ambiguities can be selected,the integer ambiguities are searched out through the computation of non-dispersive error e.g.tropospheric delay and orbit offset between reference stations.Test data were used to evaluate the algorithm.The results indicate that this algorithm can provide reliable double difference integer ambiguities very quickly for long-range reference stations.