An investigation on accuracy of DGPS network-based positioning in mountainous regions, a case study in Alborz network

Nejat, D. and Klamehr, R. (2013) An investigation on accuracy of DGPS network-based positioning in mountainous regions, a case study in Alborz network. Acta Geodaetica et Geophysica Hungarica, 48 (1). pp. 39-51. ISSN 1217-8977

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Abstract

Establishment of DGPS networks and applying of measurement domain methods enables the users to have precise DGPS surveying and navigation. In this research five permanent GPS stations in Alborz GPS network in north of Iran, have been selected to simulate practical realization of these methods. Results show the current measurement domain methods face to reduction of efficiency and accuracy level with increasing of the height differences in mountainous regions, but modification of some models and strategies overcome undesired influences of height differences. In code observation domain the introduced modified interpolation methods by incorporation of geodetic height, show the most efficiency, while in carrier phase observation domain, fitting of bi-linear surface results the best accuracy level requiring for ionosphere free combinations.

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