Assessment of geodetic coordinates processed using different baselines

Assessment of geodetic coordinates processed using different baselines
Elmo Leonardo Xavier Tanajura1, Rodrigo Mikosz Gonçalvez2, Admilson da Penha Pacheco3, Cláudia Pereira Krueger4

1.Center of Technological and Exacts Sciences, Federal University of Acre (UFAC), Rio Branco, AC, Brazil (elmo@ufac.br, elmotanajura@yahoo.com.br)
2,3.Department of Cartography Engineering, Federal University of Pernambuco (UFPE), Geodetic Science and Technology of Geoinformation Post Graduation Program, Recife, PE, Brazil. (rodrigo.mikosz@ufpe.br, admilpp@ufpe.br)
4.Geodetic Science Post Graduation Program, Federal University of Parana (UFPR); Curitiba, PR, Brazil (ckrueger@ufpr.br)

Abstract: The relative kinematic methods of GNSS positioning are characterized by the movement of a rover station, tracking simultaneously at least one fixed base station, for trajectory coordinate solution. The purpose of this work is to evaluate the accuracy of geodetic coordinates from kinematic surveying, processed using different baselines. The relative kinematic surveying was made with a GPS receiver along a sand spur located in Ilha do Mel in Paraná State, Brazil. Use was made of 4 base stations for data processing, where 3 stations belonged to the Brazilian network called Rede Brasileira de Monitoramento Contínuo (RBMC): NEIA; UFPR, and IMBT. A fourth station called CASA was a static base station near the survey. After data processing, these stations generated baselines with lengths averaging around 0.7km, 70km, 90km and 300km for vectors generated by CASA, NEIA, UFPR and IMBT, respectively. The vectors were classified according to the ambiguities solution. The survey precision limit was fixed to 0.1m + 1 ppm for horizontal and vertical coordinates. The tridimensional standard deviations in meters obtained in processing were 0.044; 0.321; 2.522; 7.00. The deviations values obtained, represent the degradation of generated coordinates, where their values increase depending on the increase of baseline.

Keywords: GNSS, geodetic coordinates, baseline processing, coastal application

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