The Design and Realization of Large Plane Colour Ccd Digital Aerial Camera System

On the basis of a size single plane array CCD (SPAC-1), we study and establish a digital aerial photogrammetry camera system, which adopts a “3+1”modular design method, i.e., three k k 9 9 × k k 2 2 × CCD modules for recording RGB band images and one CCD module for recording the panchromatic image. Every module has an independent optical system, with the same ground coverage obtained at the exposal instant. After the flight, k k 9 9 × k k 2 2 × size true colour images are first synthesized with RGB band images, then true colour images are fused with k k 2 2 × k k 9 9 × panchromatic images, and finally colour images are obtained. A comprehensive flight test was carried out with this camera system in Qufu area, Shandong province in May, 2005. In the flight conditions of a 800m-flight height and a 150 velocity, this camera achieved the 10cm GSD design index. Employing these images, we plot a 1:1000 topographic map and field precision test shows that the horizontal mean square error of outstanding points relative to the nearest GCP is 0.3 , the vertical mean square error 0.45 . So far, 340 of Guangzhou City aerial photogrammtry task has been finished by using this system. k k 9 9 ×