COULOT , David

The present quality of space-geodetic techniques allows analysts to compute time series of geodetic products (Earth Orientation Parameters (EOPs) and terrestrial station positions for instance). These new products have to be used for the realization of Terrestrial Reference Systems, in constant improvement. They should also allow us to study...

International audience

The French Transportable Laser Ranging System (FTLRS) was deployed in the calibration site of satellite radar altimeters in Corsica over the 2002 and 2005 campaigns. The paper describes the different steps of SLR data processing. The average arcs RMS obtained are about 1-2 cm for Lageos-1&-2, Starlette and Stella satellites; it is shown that...

In the framework of the activities of the Combination Research Centers (CRC) of the International Earth Rotation and Reference Systems Service (IERS), the French Groupe de Recherche en Géodésie Spatiale (GRGS) studies the benefit of combining space-geodetic techniques (Doppler orbitography and radiopositioning integrated by satellite, GPS,...

In this paper, we use SLR data tracked by the ILRS network over the last twenty years to derive time series of Earth Orientation Parameters, as well as time series of low wavelengths of the Earth's gravity field. The work is based on post-fit residuals analyses, performed with the stacking of weekly-orbital arcs of the constellation of geodetic...

International audience

In this paper, we use SLR data tracked by the ILRS network over the last thirty years to derive time series of Earth Orientation Parameters, and some of the low wavelengths of the Earth's gravity field, namely the degree 2. The work is based on parameters deduced from weekly or monthly orbital arcs of the constellation of geodetic spherical...

In this paper, we use SLR data tracked by the ILRS network over the last thirty years to derive time series of Earth Orientation Parameters, and some of the low wavelengths of the Earth's gravity field, namely the degree 2. The work is based on parameters deduced from weekly or monthly orbital arcs of the constellation of geodetic spherical...

This poster presents the context of the astronomical Virtual Observatory (VO), an ambitious international proposal to provide uniform, convenient access to disparate, geographically dispersed archives of astronomical data from software which runs on the computer on the astronomer's desktop. The VO could be of interest for the geodetic...

Ce numéro du Bulletin d'information dresse le bilan des activités de recherche de l'Institut Géographique National en 2001. Les quatre laboratoires de l'IGN présentent leurs travaux en photogrammétrie, traitement d'image, instrumentation, système d'information géographique et géodésie. Quelques sujets sont développés : les traitements...