The method of implementing relative geodetic positioning by GPS/GLONASS signals using the float processing of phase observations

The article proposed a method of implementing relative geodetic definitions by GPS and/or GLONASS signals using the current processing of the first differences of phase observations. The algorithm of processing observations is universal for single-frequency and double-frequency observations, and makes it possible sufficiently simply to form weight matrices of observations, to rule out the problem of choosing a reference satellite and organize the recovery of the losses of the phase cycles. The proposed method of processing makes it possible to simplify program implementation of relative geodetic definitions in static and kinematic operational modes and raise the reliability of resolving phase ambiguity

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

The results of creation and research of the new effective method for processing of the double–frequency kinematics GNSS observations with the purpose of detection, estimation and repair of carrier phase cycle slips are presented. This method is based on the use of observations’ increases at times and the special procedure of the joint least–squares method estimation of aggregate of informative (increases of coordinates and divergences of clock) and uninformative parameters (carrier phase cycle slips). The estimation of carrier phase cycle slips is carried out by direct enumeration in a preliminary determined search area. Verification of the offered method is carried out with the use of simulation and the real GNSS observations. Shown that reliable determine and repair of carrier phase cycle slips in the consider case is achieve at the complete or partial loss of observations on the intervals up to 20 s

Elimination of cyclic phase slips of single-frequency kinematic GNSS observations

The results of development of a new method for the estimation and elimination of cyclic phase slips of single-frequency kinematic GNSS observations have been presented. The investigations and verification of the proposed method were performed using simulations and real GPS observations. Conditions of the continuity restoration of phase observations were determined; the specified conditions ensure a reliable elimination of cyclic phase slips under conditions of the partial and total loss of observations on intervals of up to 30 s. The possibilities of enhancing the reliability of elimination of phase slips were investigated using a group of increments of observations obtained under the free running and differential modes of coordinate determinations. It was shown that the reliability of solving the problem in question was critically dependent on the use of smoothed code observations. The smoothing of code observations makes it possible to achieve a much larger effect as compared with an attempt of increasing the number of satellites in the current constellation