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Corrección de las medidas gravimétricas, por efecto de marea, obtenida a partir de las observaciones efectuadas en la red Ibérica de mareas gravimétricas

Authors: Vieira, Ricardo; Camacho, Antonio G.;

Corrección de las medidas gravimétricas, por efecto de marea, obtenida a partir de las observaciones efectuadas en la red Ibérica de mareas gravimétricas

Abstract

One of the main aims the research that we have been carrying out in the Iberian Peninsula, since 1974, into periodical variations in gravity, has been to gather observations in a large enough quantity, and from an adequate variety of locations, to enable us to build a model; a model which would allow the neccesary gravimetrical corrections to be calculated wherever needed (R. Vieira, 1978). At present, this is possible, even if while the foreseen observations are being carried out, the model will gradually improve, above all in the areas where there is a considerable shortage of observations. In this report we describe the method followed to draw up this model, and we present results which demostrate the important differences that exist between the corrections calculated when using the classic theoretical model (Sevilla, M. J., 1976) and those obtained from the semi-ernpiric model which we have drawn up. These differences, which naturally will depend on the time and the point that the observation is taken, can be of the order of 2 X 10-7 mrsecond2, which equals 20 microgals (1 gal = 1 cm/second2).

Uno de los objetivos de las investigaciones que desde 1974 venimos realizando en la Península Ibérica sobre variaciones periódicas de la gravedad, es llegar a obtener un suficiente número de observaciones, adecuadamente distribuidas, como para construir un modelo que permita el cálculo de la correción de marea en cualquier punto y en el momento que sea necesario (R. Vieira, 1978). En la actualidad esto resulta posible si bien, conforme se vaya completando todas las observaciones previstas, el modelo se irá mejorando sobre todo en aquellas zonas en las que el déficit de observaciones es aún notable. En este trabajo exponemos el método seguido para la construcción del modelo y se presentan resultados que ponen en evidencia las importantes diferencias existentes entre las correcciones calculadas a partir del modelo teórico clásico (Sevilla, M. J., 1976) Y las obtenidas a partir del modelo semiempírico que hemos construido. Estas diferencias, que dependerán lógicamente del punto de observación y del tiempo, llegan a ser del orden de 2 X 10-7 m/seg2 o lo que es igual de 20 I'gales (1 gal = l cm/seg2).

Este trabajo ha sido publicado en la Revista de Geofísica y en la Publicación del Instituto de Astronomía y Geodesia (CSIC-UCM).

Peer reviewed

Keywords

Modelo teórico, Corrección, Gravedad, España, Mareas terrestres, Gravimetría

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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