DELEFLIE , Florent

This paper provides a hamiltonian formulation of the equations of motion of an artificial satellite or space debris orbiting the geostationary ring. This theory of order 1 has been formulated using canonical and non-singular elements for eccentricity and inclination. The analysis is based on an expansion in powers of the eccentricity and of the...

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International audience

International audience

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...

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...

OCA/GEMINI-GRGS is currently moving from its status of an associate ILRS analysis center to an official ILRS analysis center. The ILRS (International Laser Ranging System) is one of the nine services of the International Association of Geodesy (IAG). This new status should permit to GRGS to validate and, especially, enlighten in an easy way its...

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...