Patent ID: 9310198
Filing Date: 2016-04-12
CPC Classification: G01C,G01S

Claim Text:
1. A method run on a processor for locating a target land area (ZC) three-dimensionally by means of an optical sensor (CO) and a radar sensor (CR) carried respectively in satellites (STO, STR), comprising measuring the positions ({right arrow over (p)} IO , {right arrow over (p)} IR ) of the satellites when the sensors point at land areas, wherein it comprises measuring a sight direction ({right arrow over (u)} IO ) of the optical sensor and capturing an image (IO) of a land area (ZT IO ) for each of the measured positions ({right arrow over (p)} IO ) of the optical sensor (CO), measuring the distance (d IR ) between a land area (ZT IR ) and the radar sensor (CR) and capturing an image (IR) of the land area (ZT IR ) for each of the measured positions ({right arrow over (p)} IR ) of the radar sensor (CR), comparing the images (IO) captured by the optical sensor (CO) and the images (IR) captured by the radar sensor (CR), matching the images (IO, IR) of land areas (ZT IO , ZT IR ) captured by the optical and radar sensors and covering common land areas, and determining the distance (δ) between the target land area selected from the common land areas and the optical sensor as a function of the positions ({right arrow over (p)} O , {right arrow over (p)} R ) of the sensors, the distance (d R ) between the target land area and the radar sensor, and the sight direction ({right arrow over (u)} O ) of the optical sensor, which are associated with the images captured by the optical and radar sensors covering the target land area.