Determination and improvement of spatial resolution of the CCD-line-scanner system ADS40

Abstract

Images that are collected for mapping purposes from airborne or space-borne sensors have to cover large areas by great image swaths at a high spatial resolution. These demands can be fulfilled by push-broom scanners featuring staggered line arrays, which are constructed from two identical CCD lines shifted against each other by half a pixel in line direction. Practical applications of such arrays in remote sensing include SPOT, and in the airborne environment the Airborne Digital Sensor, or ADS40, from Leica Geosystems. Furthermore, image restoration methods for enhancing the image quality can be applied to improve image quality and resolution. This paper presents an approach of high resolution image restitution from staggered lines and practical results with ADS40 high resolution panchromatic images.