1. Budapest University of Technology and Economics,Hungary
2. California Institute of Technology,NASA Jet Propulsion Laboratory,Pasadena,CA,U.S.A.,91106
3. University of Colorado,INSTAAR,Boulder,CO,U.S.A.
4. Warsaw University of Technology,Remote Sensing and Spatial Information Systems, Faculty of Geodesy and Cartography,Department of Photogrammetry,Warsaw,Poland,00-661