An evaluation method of the retrieved physical quantity from high resolution spectrum using analysis of variance in experimental design

摘要

The purpose of the satellite remote sensing is not only observation of the surface on the earth but also measurement of a physical quantity in these days. For example, column density of carbon dioxide (CO_2) will be retrieved by satellite remote sensing. Though there are some constraints which are, for example, existing clouds, satellite remote sensing is able to observe almost all over the surface on the earth. Further, sensor technology is developing rapidly in these days. Therefore, amount of a minute substance can be also measured, and it is considered that the necessity to measure a physical quantity from a satellite will increase in future more and more. Then, it is very important to evaluate the accuracy of the obtained physical quantity by satellite remote sensing. The evaluation method which is established and high efficient is necessary. We propose an evaluation method of the obtained physical quantity based on the analysis of variance (ANOVA) in experimental design [1][2]. An observation deriving from satellite remote sensing, which is different from experiment in laboratory, is very wide scale. Therefore, the error which is included in an obtained physical quantity in fact is difficult to evaluate. And it is difficult that the observation condition such as temperature profile from surface to top of atmosphere is not able to know accurately. Therefore, in this study, the error of an obtained physical quantity is evaluated by numerical simulation. First, the noises and the process until a physical quantity is obtained are modeled. Next, experiments are designed. Last, the error of an obtained physical quantity is evaluated using ANOVA.First, we described the theory about the evaluation method of an obtained physical quantity by satellite remote sensing. And then, for one example, an evaluation result of the retrieved CO_2 column density is shown.