Comparación de los resultados en la resolución de ambigüedades para una red de estaciones GNSS en Europa con el uso de datos GPS y la combinación con datos GLONASS, utilizando el programa de procesamiento Bernese
Fecha
2017-07-31
Autores
Paniagua Jimenez, Diana
Valverde-Calderón, Jose
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Editor
Universidad Nacional (Costa Rica)
Resumen
Los parámetros de la ambigüedad en las ecuaciones de observación originales son números enteros. Técnicamente  son  necesarios  dos  pasos  para  fijar  las  ambigüedades:  primero,  los  parámetros  son  estimados  como  valores  reales;  en  el  segundo  paso  se  fijan  a  números  enteros.  La  fijación  de  las  ambigüedades disminuye el número de parámetros a estimar en el ajuste final, lo cual lleva a un ahorro en número de elementos que se almacena en la memoria, en el tiempo invertido en el procesamiento y una mejora en la calidad del cálculo de las coordenadas. Se efectuó la comparación entre los resultados de dos procesamientos de la misma red: en el primero, se procesaron solo observaciones GPS; en el segundo cálculo, se procesaron de forma conjunta observaciones GPS y GLONASS. La red usada en el proyecto está conformada por 25 estaciones GNSS, ubicadas en Europa. El procesamiento se efectuó con  el  programa  Bernese  5.2.  Se  concluyó  que  la  selección  de  la  estrategia  para  fijar  ambigüedades  es un aspecto que debe analizarse detenidamente, debido al impacto que tiene el método de cálculo seleccionado sobre los resultados finales y el tiempo de procesamiento requerido.
The parameters of the ambiguity in the original observation equations are integer numbers. Technically two procedures are necessary to fix the ambiguities: first, the parameters are estimated as real values; in the second step, they are set to integers. Fixing the ambiguities decreases the number of parameters to be estimated in the final adjustment of the network, taking this result in a reduction in the number of items stored in memory, in the time investing in the processing and an improvement in the quality of the calculate of coordinates. It was made the comparative analysis between the results after processing the network two times: in the first one, only GPS observation was processed; in the second one, both GPS and GLONASS observations were processed. The network used in the project has 25 GNSS stations, located in Europe. The processing was made using the Bernese GNSS software version 5.2. The main conclusion is the importance in the selection of the ambiguity strategy due to is a topic that require an complete analysis, due to the impact that the choose computation method have in the finals results and in the processing time.
The parameters of the ambiguity in the original observation equations are integer numbers. Technically two procedures are necessary to fix the ambiguities: first, the parameters are estimated as real values; in the second step, they are set to integers. Fixing the ambiguities decreases the number of parameters to be estimated in the final adjustment of the network, taking this result in a reduction in the number of items stored in memory, in the time investing in the processing and an improvement in the quality of the calculate of coordinates. It was made the comparative analysis between the results after processing the network two times: in the first one, only GPS observation was processed; in the second one, both GPS and GLONASS observations were processed. The network used in the project has 25 GNSS stations, located in Europe. The processing was made using the Bernese GNSS software version 5.2. The main conclusion is the importance in the selection of the ambiguity strategy due to is a topic that require an complete analysis, due to the impact that the choose computation method have in the finals results and in the processing time.
Descripción
Palabras clave
GEODESIA, SISTEMAS DE POSICIONAMIENTO GLOBAL, GEODESY, GLOBAL POSITIONING SYSTEMS
