Daniel Greslou

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PLEIADES High Resolution is a two-satellite constellation dedicated to Earth Observation. Satellites are planned for launch in 2011 and 2012. Key technological evolutions have been introduced in comparison with the former generation. Particularly, the resolution will be up to 70 cm (vs. 2.5_m on Spot5) in panchromatic band, and 2.8 m in multispectral bands.(More)
Pleiades is a high-resolution optical Earth observation system developed by CNES, for civilian and militarian users. It is the French part of the French-Italian ORFEO program which also comprises COSMO-SkyMed, an Italian high-resolution radar system. The launch of the first Pleiades satellite is scheduled in 2008, the second, one year later. Their(More)
PLEIADES is the highest resolution civilian earth observing system ever developed in Europe. This imagery program is conducted by the French National Space Agency, CNES. It operates since 2012 a first satellite PLEIADES-HR launched on 2011 December 17th, a second one should be launched by the end of the year. Each satellite is designed to provide optical 70(More)
1. ABSTRACT Since SPOT1, the French national space center (CNES) has worked on improving the geometry of Earth observation spacecrafts. The accuracy of sensor calibration is one of the main key points for any Earth observation application such as orthorectification, DEM generation or surface change detection [6]. Two families of methods have been developed(More)
The new French high resolution earth observing satellite PLEIADES-HR will be launched in 2011. A specific design and new technologies have been embarked to provide great agility. These capabilities offer new methods to perform the image quality activities during the commissioning period. Some of them depend on dedicated guidance of the satellite platform(More)
The advent of commercial observation satellites with an increasingly fine resolution requires the definition of whenever more accurate geometrical models to correct most of the main image distortions. This effort must be taken into account earlier in the image processing chain so as to minimize the use of external references, sometimes unavailable and often(More)
This paper describes a simple pushbroom camera model for Earth observation satellites and proposes a new algorithm to refine the orientation parameters of a camera from a set of ground control points. The relative importance of the various orientation parameters is analyzed. On the last generation of high resolution satellites such as Pléiades and(More)
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