Department of Geodesy and Geoinformation, Vienna University of Technology, Gusshausstraße 27-29, 1040 Vienna, Austria
Mapping and Positioning from Space (MAPS) Technology Research Center, Department of Survey Engineering, Chulalongkorn University, Bangkok 10330, Thailand
Wilfried Karel
Department of Geodesy and Geoinformation, Vienna University of Technology, Gusshausstraße 27-29, 1040 Vienna, Austria