New effective method of eliminating cyclic phase slips during double-frequency kinematic GNSS observations

Design and research results of a new effective method of processing double-frequency kinematic GPS observations with the purpose of detection, estimation and elimination of cyclic phase slips are presented. This method is based on using time increments of observation and a special procedure of joint least-square estimation for a set of informative (coordinate increments and clock divergence) and non-informative parameters (carrier cyclic phase slips). The estimation of carrier cyclic phase slips is carried out by direct enumeration in the preliminarily determined search region. Verification of the suggested method is performed using simulation and real GPS observations. It is shown that reliable detection and elimination of cyclic phase slips during complete or partial loss of data on 20 second intervals is achieved in the considered case.