Stability control of range biases on the French laser ranging stations

Nicolas, J, Exertier P, Bonnefond P, Pierron F, Boudon Y, Mangin JF, Barlier F, Kasser M, Haase J.  1999.  Stability control of range biases on the French laser ranging stations. Laser Radar Ranging and Atmospheric Lidar Techniques II. 3865( Schreiber U, Werner C, Eds.).:27-32., Florence, Italy

Date Published:

Sep 20-21


calibration, collocation, positioning, satellite laser ranging, space geodesy


Space geodetic techniques of artificial; satellites tracking have been greatly improved since this last decade. Particularly, the successful development of radio tracking systems like GPS, DORIS, and PRARE has to be emphasized, concerning precise positioning, orbit determination, and gravity field determination. All these techniques are able to operate under all weather conditions and are of very easy use. In fact, all the complexity of systems is to be found in space on board the satellites. To some extent, for laser satellite tracking, the situation is the opposite. It is weather dependent and comparatively complex and costly at the ground level. However, this technique is the most straightforward in concept for accurate measuring of the Earth-satellite distance. But, it is true, provided that instrumental biases can be well understood and precisely estimated. As a result, the role of laser tracking has to be reassessed and the control of range biases is nowadays of the utmost importance. Therefore, the international organization for laser cooperation (ILRS) has been reconsidered and the purpose of this paper is to present the effort made in this field at the Grasse, France observatory.