Abstract
This paper describes the systematic analysis of the input power level, signal-to-noise ratio (S/N) characteristics and observation bandwidth for a high resolution earth observation system accommodated with charge coupled devices (CCD). The paper reports on the analysis of the S/N characteristics of the observation system using CCD considering the input power dependent noise. As a result of the analysis, the paper gives the diameter of the optical telescope for the required S/N value, and the examination results of the diameter of actual telescopes for satellite use.
Accompanying the progress to higher resolution, the fine structure of the ground surface becomes to affect the input optical power. The paper reports on the input optical power characteristics in the case. of uneven ground surface and partial specular reflectance characteristics applying a simple surface model. The analysis shows that the signal dynamic range expands and the minimum signal level decreases in the higher recolution system with uneven ground surface.
The paper also reports on studies for optimization of observation bandwidth considering the optical wavelength characteristics of the ground surface. The optimized observation bandwidth is analyzed to be expanded from reflection bandwidth in low S/N region.
