Troposphere Modeling in Local GPS Network

摘要

Precise position determination of network points, particularly their vertical component is especially difficult in mountainous areas. Significant altitude differences and spatial variations of atmo spheric parameters require the best possible approach to tropo spheric delay (TD) estimation expressed by maximum reduction of systematic error caused by tropospheric refraction. The procedure of local meteorological parameters modelling (inter polation) in a GPS network area on the basis of meteorological observations, carried out concurrently to GPS measurements was introduced. The paper presents results of GPS data processing of local network KARKONOSZE (Sudetes, SW Poland) using different input data (standard atmosphere, MOPS model and ground meteorological data) and different methods of tropospheric delay estimation.