Abstract: The large scanning angle and multiple probe of MODIS detector make the scan image distorted. Based on the SWATH data processing strategy, the relationships of space location of the MODIS 1B data with different resolutions, the corresponding status between image data and longitude and latitude information were analyzed. In order to match the image data, the image was combined by the geographical locations considering the scan method of the MODIS detector, the ascending and descending orbit of the satellite, and the earth curvature and so on. The raster feature of data was replaced by vector feature in this method. The image pixel can be located more exactly through this method. The results indicate that the geometry correction can be done more accurately for MODIS data, so is for that of the sub pixel. This method could avoid information losing when the pixel is relocated, and it never generates BowTie effect.

Key words: SWATH data processing strategy, Vector feature, Geometry correction, BowTie