GNSS antenna array-aided CORS ambiguity resolution

Array-aided precise point positioning is a measurement concept that uses GNSS data, frommultiple antennas in an array of knowngeometry, to realize improvedGNSS parameter estimation proposed by Teunissen (IEEE Trans Signal Process 60:2870–2881, 2012). In this contribution, the benefits of array-aided CORS ambiguity resolution are explored. The mathematical model is formulated to show how the platform-array data can be reduced and how the variance matrix of the between-platform ambiguities can profit from the increased precision of the reduced platform data. The ambiguity resolution performance will be demonstrated for varying scenarios using simulation. We consider single, dualand triple-frequency scenarios of geometry-based and geometry-free models for different number of antennas and different standard deviations of the ionosphere-weighted constraints. The performances of both full and partial ambiguity resolution (PAR) are presented for these different scenarios. As the study shows, when full advantage is taken of the array antennas, both full and partial ambiguity resolution can be significantly improved, in some important cases even enabling instantaneous ambiguity resolution. PAR widelaning and its suboptimal character are hereby also illustrated. B. Li (B) · P. J. G. Teunissen College of Surveying and Geo-Informatics, Tongji University, Shanghai, People’s Republic of China e-mail: [email protected]; [email protected] B. Li · P. J. G. Teunissen GNSS Research Centre, Curtin University, Perth, Australia P. J. G. Teunissen Geoscience and Remote Sensing, Delft University of Technology, Delft, Netherlands e-mail: [email protected]