Abstract
Satellite laser altimetry is one of the most advanced information acquisition technologies in Earth observation system. It can provide high-accuracy elevation information, however, due to the lack of detail intensity information, its planimetric accuracy is usually worse than the elevation accuracy. Gaofen 7 (GF-7) satellite scheduled for launch in 2019 will be equipped with laser altimeter, footprint camera, stereo mapping camera, etc. The laser altimeter together with the footprint camera was designed to provide high accuracy ground control point of satellite mapping. The laser altimeter can provide the high-accuracy elevation information and the joint processing of footprint camera and stereo mapping camera can provide high-accuracy planimetric information. Therefore, this paper mainly studies the technology of extracting high-accuracy control points based on GF-7 satellite’s altimeter, footprint camera and stereo mapping camera using a simulated dataset extracted from Quickbird image and ICESat altimetric data.
Highlights
Satellite laser altimetry has been used in deep space exploration since 1960s because of its highaccuracy range detection capability
Stereo mapping camera obtains the stereo image of the earth surface under flight conditions and the laser altimeter is used to provide the control point in the stereo image with the assistance of the footprint image imaged by footprint camera
This paper focuses on the research of the technology of extracting high accuracy control points based on Gaofen 7 (GF-7) load characteristics using a simulated dataset by Quickbird image and ICESat altimetric data
Summary
Satellite laser altimetry has been used in deep space exploration since 1960s because of its highaccuracy range detection capability. In the field of earth science, besides some experimental loads, the laser altimeter GLAS of ICESat satellite[1] launched by NASA in 2003 is the first satelliteborne laser altimeter system in the world and was retired in 2010. GF-7 is a high resolution stereo mapping satellite and its main payloads include laser altimeter, footprint camera and stereo mapping camera. Stereo mapping camera obtains the stereo image of the earth surface under flight conditions and the laser altimeter is used to provide the control point in the stereo image with the assistance of the footprint image imaged by footprint camera. This paper focuses on the research of the technology of extracting high accuracy control points based on GF-7 load characteristics using a simulated dataset by Quickbird image and ICESat altimetric data
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