Para hablar de sistemas GNSS debemos definir el término GNSS (Global Navigation Satellite System). Se denomina así, de forma genérica a los Sistemas de Navegación por Satélite que proporcionan un posicionamiento geoespacial con cobertura global, tanto de forma autónoma, como con sistemas de aumentación. El primer sistema operativo fue el sistema GPS, gestionado por el…
Los sistemas GNSS se apoyan en la idea de considerar la posición de los satélites como puntos de coordenadas conocidas y a partir de ellos georeferenciar el receptor sobre un marco de referencia.
La Geodesia Espacial aparece con la aplicación de técnicas espaciales para la definición de marcos de referencia y el estudio de la forma de la Tierra, de su campo de gravedad y de su comportamiento. La Geodesia espacial incluye la Geodesia por satélite (GNSS, DORIS, GRACE,…) y técnicas de interferometría de muy larga base VLBI, SLR, LLR.
Una de las tareas a realizar en el campo de la Geomática, ya se trate de Topografía o Geodesia es la compensación rigurosa de una red GNSS de puntos. A la hora de enfrentarse al procesamiento de una red GNSS son muchos los datos GNSS a tener en cuenta, sobre todo si se trata de…
This article describes, in association with Albireo Topografia y Geomática, expert opinion and land surveyors’ expert reports commonly requested by courts and lawyers in those technical disciplines related to real estate, within the framework of the current Spanish legislation. As established in Spanish Civil Code Article 348 “property means the right to possess, enjoy and dispose of…
In the 1890’s and early 1900s, the National Geographic Institute (IGN) of Spain carried out geodetic studies required to georeference the boundaries of every single municipality in Spain, survey the boundaries and mark them out. The field notes for these studies still exist and can still be referenced today. Nowadays, most of the landmarks that…
The Betic Cordillera is placed in the westernmost end of the Alpine Mediterranean belt and it is being deformed by the African and Eurasian convergence of the plates. The relative displacement between both plates in the Iberian Peninsula sector is approximately 4-5 mm / year in a NW-SE direction. This slow but constant approaching of the…
Land subsidence is a natural hazard that sometimes causes significant economic damage and great alarm. The causes of land subsidence are diverse and sometimes complex, and all lead to vertical deformations of the earth’s surface. These deformations can range from a few millimetres to several meters for periods ranging from minutes to years. This paper, in association…
Displacements and ground motions near volcanoes are one of the warning signs of volcanic eruptions. One of the most important tools to detect such movements is the technology provided by GNSS permanent stations network. This paper, in association with Albireo Topografia y Geomática, studies the use of GNSS techniques for the determination of the spatial and temporal displacements…
Sixty per cent of human deaths caused by natural disasters in the past decade were due to earthquakes. Earthquake monitoring has assumed great importance in recent scientific studies and one of the most recent additions to the numerous inter-disciplinary techniques employed for studying earthquakes are GNSS technologies. GNSS technologies and permanent station networks have created…