Research For GPS Carrier Phase Integer Ambiguity Solution And Cycle Slip Detection

With the development of relative positioning technology in global positioning system,separate the use of pseudo range positioning cannot meet the demand of high precisionpositioning, relative positioning of carrier phase is beginning to be widely concerned. Thekey technology is the carrier phase ambiguity resolution and detection and repair cycleslip. According to the two core issues of carrier phase positioning technology, this paperin-depth research from the aspects of theory and Practice.This paper first introduces the two basic methods of observation: pseudo rangeobservation and carrier phase observation, analysis of the carrier phase observation modelin detail, and the carrier phase measurements of the linear combination. At the same timediscussed the observation model used in single difference, double difference and the threedifference observation methods, analysis the error of satellite related, related with signalpropagation and the error of receiver related, the following solution of double differenceambiguity is based this part.Detailed analysis of the dual-frequency pseudo and carrier group legal solution widelane ambiguity, LAMBDA algorithm for solving the integer ambiguity, through the actualobservation data to simulate the two algorithms, analysis of advantages and disadvantagesof the two methods in solving the ambiguity and the scope of application. Finally, get amethod for determining the integer ambiguity. Using single epoch pseudo and carrierdouble difference observation equations, based on the LAMBDA method for solving awide lane ambiguity float solution for fixed, greatly improve the solution time andaccuracy of ambiguity.In addition, the paper analysis several common methods of cycle slip detection,analysis the impact of observation data of different sampling rate to high order differencemethod, combined with the phase pseudo offset and ionosphere residual method, make fulluse of the advantages of various methods, through the experimental data verified thedetection precision of the combination method, and the ability to small-large cycle slip.Finally, by writing simulation software, makes a comprehensive analysis to the parametersof cycle slip.