Desarrollo de una metodología de medición con el Sistema de Posicionamiento Global GPS para el estudio cinemático de cuerpos en la superficie de la tierra.
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Fecha
2001
Autores
Moya Zamora, Jorge
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Universidad Nacional (Costa Rica)
Resumen
En el presente trabajo final de graduación se determinó cómo se puede detectar el cambio en el orden milimétrico en la posición de puntos, mediante mediciones en el sistema de posicionamiento global GPS y con amarres a las estaciones que conforman el Marco Internacional Terrestre de Referencia ITRF, logrando exactitudes del orden milimétrico en la parte planimétrica y centimétrico en la parte altimétrica. El trabajo se realizó en la torre de observación de la Escuela de Topografía, Catastro y Geodesia en donde se encuentra uno de los puntos físicamente más estables del país, denominado ETCG. Se tomó este punto para efectuar la investigación ya que había formado parte de un proyecto de investigación del cual se obtuvo posición dentro del ITRF con una altísima exactitud. Partiendo de esa posición conocida de ETCG se realizaron nuevas mediciones GPS en la modalidad diferencial contemplando estaciones ITRF como putos de amarre. Se realizaron dos campañas de medición con el objetivo específico de poder detectar cambios en la posición del punto desde su vínculo al ITRF a mediados de 1998. Los diferentes archivos de datos de las estaciones mundiales y de efemérides satelizarías se consiguieron vía internet, con los cuales se procesaron los vectores entre ETCG y las estaciones consideradas en el amarre en cada una de las épocas para lograr, en terminología GPS, las mejores soluciones. Los resultados demuestran que el punto ETCG sufrió, dentro del periodo de investigación comprendido entre las épocas 1998,35 y 2000,92, un movimiento significativo, como desplazamiento tridimensional resultante. Los datos muestran, sin embargo, que con respecto a las componentes horizontales de latitud y longitud únicamente, el desplazamiento total de 15,22mm +- 13,33mm del punto, no es estadísticamente significativo.
In the present final graduation work, it was determined how the change in the millimeter order in the position of points can be detected, through measurements in the GPS global positioning system and with moorings to the stations that make up the International Terrestrial Reference Framework ITRF, achieving accuracies of the millimeter order in the planimetric part and centimetric in the altimetric part. The work was carried out in the observation tower of the School of Topography, Cadastre and Geodesy where one of the most physically stable points in the country is located, called ETCG. This point was taken to carry out the research since it had been part of a research project from which a position within the ITRF was obtained with very high accuracy. Starting from that known position of ETCG, new GPS measurements were made in the differential mode, contemplating ITRF stations as mooring points. Two measurement campaigns were carried out with the specific objective of being able to detect changes in the position of the point since its link to the ITRF in mid-1998. The different data files of the world stations and satellite ephemeris were obtained via the internet, with which The vectors were processed between ETCG and the stations considered in the mooring in each of the times to achieve, in GPS terminology, the best solutions. The results show that the ETCG point underwent, within the period of investigation comprised between the periods 1998,35 and 2000,92, a significant movement, as a resulting three-dimensional displacement. The data show, however, that with respect to the horizontal components of latitude and longitude only, the total displacement of 15.22mm + - 13.33mm of the point is not statistically significant.
In the present final graduation work, it was determined how the change in the millimeter order in the position of points can be detected, through measurements in the GPS global positioning system and with moorings to the stations that make up the International Terrestrial Reference Framework ITRF, achieving accuracies of the millimeter order in the planimetric part and centimetric in the altimetric part. The work was carried out in the observation tower of the School of Topography, Cadastre and Geodesy where one of the most physically stable points in the country is located, called ETCG. This point was taken to carry out the research since it had been part of a research project from which a position within the ITRF was obtained with very high accuracy. Starting from that known position of ETCG, new GPS measurements were made in the differential mode, contemplating ITRF stations as mooring points. Two measurement campaigns were carried out with the specific objective of being able to detect changes in the position of the point since its link to the ITRF in mid-1998. The different data files of the world stations and satellite ephemeris were obtained via the internet, with which The vectors were processed between ETCG and the stations considered in the mooring in each of the times to achieve, in GPS terminology, the best solutions. The results show that the ETCG point underwent, within the period of investigation comprised between the periods 1998,35 and 2000,92, a significant movement, as a resulting three-dimensional displacement. The data show, however, that with respect to the horizontal components of latitude and longitude only, the total displacement of 15.22mm + - 13.33mm of the point is not statistically significant.
Descripción
Moya Zamora, J. (2001). Desarrollo de una metodología de medición con el Sistema de Posicionamiento Global GPS para el estudio cinemático de cuerpos en la superficie de la tierra. [Tesis de Licenciatura*]. Universidad Nacional, Costa Rica.
Palabras clave
SISTEMAS DE POSICIONAMIENTO GLOBAL, GLOBAL POSITIONING SYSTEMS, GEODESIA, GEODESY, MEDICION, MEASUREMENT, REDES, SATELITES, MEDICION DE SUPERFICIES, SURFACE MEASUREMENT