Pascal Parraud

CS SI, France, Toulouse · BU E-SPACE & Geo Information

Semi-analytical propagation techniques are of great interest, as they aim to combine the accuracy of numerical techniques with the speed of analytical methods. Amongst them, the Draper Semi-Analytical Satellite Theory (DSST) stands out, with its extensive treatment of perturbations, its exibility and also its maturity. Unfortunately DSST was for l...

Verification of the java Orekit implementation of the Draper Semi-analytical Satellite Theory (DSST) is discussed. The Orekit library for space flight dynamics has been published under the open-source Apache license V2. The DSST is unique among analytical and semi-analytical satellite theories due to the scope of the included force models. However,...

SKAT is a station-keeping simulator, which aims at building and evaluating different Orbit Maintenance Strategies for LEO and GEO spacecrafts of interest to EUMETSAT. SKAT enables to: 1) propagate orbits over long time spans, accounting for realistic effects, 2) automatically introduce maneuvers in the propagation process, according to control targ...

This paper presents a new way to deal with transition matrices handling in variational equations. While working simultaneously on several problems dealing with orbit propagation: low-thrust trajectories and orbit determination, we implemented a feature allowing to add user equations to a propagator in order to solve the first problem. Then it appea...

The Orekit library is a space flight dynamics library developed since 2002 by CS. It was operationally used during the Jules Verne ATV mission. Since 2008, the library is freely available as an open-source product under the terms of the business-friendly Apache V2.0 license. Given the small size of the market and the still high need for advanced ta...