The effect of function-based and voxel-based tropospheric tomography techniques on the GNSS positioning accuracy

Tropospheric wet delay, the main source of which is water vapor, one major factors affecting accuracy positioning techniques using microwave. tomography a powerful method to reconstruct vapor content in four-dimensional (4D) space. This paper studies effect function-based and voxel-based tropospheric methods on accuracy. examination performed static kinematic modes Global Navigation Satellite Systems (GNSS) stations under different weather conditions. After validating results radiosonde observations, tomography-based solutions, including approaches, are compared with positions obtained models. The two GPS show that increases when applying approaches. able increase up component by about 0.42 0.79 cm, respectively, method. In addition, use can decrease convergence time Precise Point Positioning (PPP) solution.