Abstract:
The kinematic GNSS positioning mode has been widely used in many applications. There are techniques to obtain high precision positioning results. The relative positioning method based on a carrier phase-based differential positioning is accepted and widely used for applications requiring high accuracy positioning results. However, in less favorable observing environments (i.e. urban areas with the tall buildings, valley or crowded trees), the remaining errors can cause bad or unreliable positioning results. Another technique is to resolve the ambiguities to their correct integer values, which is very important for calculating a high accuracy distance between a satellite and a receiver. The removal of some unreliable observations data before data processing step can provide reliable positioning results. Generally, this procedure is carried out manually. This step can be considered as a trial-and-error process. The user has to re-process over and over until getting a satisfactory result. The manual method is a time-consuming process that requires the skills of an experienced user. In order to avoid this problem, a suitable method should be used, such as, optimization technique as genetic algorithm (GA). The GA is the global optimum search algorithm based on natural evolution. The aim of this paper is to present a method with aiding of GA to optimize the selection of the best GNSS satellite combination in kinematic positioning mode (case study in GPS GLONASS and COMPASS). The obtained results reveal that the aiding of GA can provide the best GNSS satellite combination (case study in GPS GLONASS and COMPASS) and improve the success rate of ambiguity resolution.