Descripción del proyecto
Unificados tres pilares de la geodesia en futuras realizaciones del marco de referencia terrestre
Los marcos de referencia terrestre (TRF, por sus siglas en inglés) ofrecen un conjunto de coordenadas de algunos puntos en la superficie de la Tierra y todas las órbitas satelitales cercanas a la Tierra. Las variaciones en la forma de la Tierra, la rotación y el campo de gravedad se consideran los «tres pilares» de la geodesia y ofrecen las bases conceptuales y observacionales de los TRF. En la actualidad, solo dos de esos tres pilares se combinan y conectan mediante espacios de coubicación en la superficie de la Tierra y mediante parámetros de orientación terrestre estándar, el tercero solo contribuye a la determinación del TRF. El proyecto SPACE-TIE, financiado con fondos europeos, preparará la unificación de los tres pilares de la geodesia en futuras realizaciones de TRF a través de técnicas geodésicas satelitales. SPACE TIE prevé evaluar el impacto gravimétrico y geométrico del transporte masivo en la atmósfera, los océanos y las regiones polares.
Objetivo
"Terrestrial Reference Frames (TRFs) are the basis to which all positions on the Earth’s surface and all satellite orbits in the near Earth space have to refer to. The changes in the Earth's shape, rotation, and gravity field, the so-called ""three pillars"" of geodesy, provide the conceptual and observational basis for the TRFs. For today’s TRF realizations, four space geodetic techniques are combined and linked by co-location sites on the Earth’s surface (“Earth’s shape”) and by common Earth orientation parameters (“Earth rotation”). The third pillar (“Earth’s gravity field”) is today only contributing to the TRF determination via its associated center-of-mass. In SPACE TIE we will pave the way to unify the “three pillars” of Geodesy in future TRF realizations. We propose to use two satellite geodetic techniques, namely Global Navigation Satellite Systems (GNSS) and Satellite Laser Ranging (SLR), to connect them by co-location sites in space. These so-called space ties shall be realized on satellites of the currently existing space infrastructure, as well as on satellites due for launch in the near future. This includes the Medium Earth Orbits (MEO) of the GNSS satellites and, in particular, all satellites in Low Earth Orbits (LEO) with GNSS and SLR co-located on-board. To maximize the sensitivity to the Earth’s gravity field, the ultra-precise inter-satellite ranging between LEO satellites of dedicated gravity missions shall be added as a third satellite geodetic technique. One and the same state-of-the-art space geodetic software package will be used to ensure that standards, background models, and processing strategies are consistently applied across all co-location satellites and measurement techniques. The outcome of SPACE TIE will allow it to assess the geometric and gravimetric impact of mass transport in the atmosphere, oceans, and ice caps in a most consistent way to globally quantify the mass exchange between the different components of the system Earth."
Ámbito científico
- natural sciencescomputer and information sciencessoftware
- social sciencessocial geographytransportnavigation systemssatellite navigation systemglobal navigation satellite system
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringsatellite technology
- natural sciencesphysical sciencesopticslaser physics
Palabras clave
Programa(s)
Régimen de financiación
ERC-COG - Consolidator GrantInstitución de acogida
3012 Bern
Suiza