海洋水色遥感交叉定标精度分析与仿真  

Analysis and Simulation of Cross Calibration Precision of Ocean Color Remote Sensing

作　　者：高慧婷[1] 马越[1] 刘薇[1] 何红艳[1] 

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2016年第2期116-125,共10页Spacecraft Recovery & Remote Sensing

基　　金：国家重大科技专项工程

摘　　要：交叉定标是解决海洋水色遥感器在轨高频次、业务化绝对辐射定标问题的重要手段,为了研究交叉定标方法对定标精度的影响,文章介绍了基于谱段匹配和光谱重构两种交叉定标方法并分析其影响因素。仿真方案针对我国"海洋一号"系列卫星海洋水色水温扫描仪(COCTS)可见近红外谱段交叉定标,结合国际典型参考遥感器光谱响应特性,基于实测水体光谱反射率数据,对比了在不同水体反射特性、大气条件及遥感器光谱响应下两种交叉定标模型引入的误差。仿真结果表明:光谱重构法交叉定标精度总体上优于谱段匹配法,参考遥感器光谱分辨率为5nm时,光谱重构法模型引入误差小于0.05%,对比结果为海洋水色遥感器交叉定标方法选择提供支持。Cross calibration is an important method for solving the high-frequency operational on-orbit calibration of ocean color remote sensor. In order to analyses the influence of two different kinds of cross calibration method on calibration precision, spectral matching and spectral reconstruction method and their influence factors are introduced. Aiming at cross calibration for COCTS of ＂HY-1＂ series satellites, and based on existing reference sensor and measured reflectance of ocean, cross calibration uncertainty of the two methods in difference ocean、atmosphere and spectral response conditions are compared. Results show that precision of spectral reconstruction method is better than that of spectral matching method as a whole, and when spectral resolution of reference sensor is 5nm, error introduced by spectral reconstruction model is less than 0.05%, providing a reference for selection of cross calibration method.

关 键 词：海洋水色遥感 交叉定标 谱段匹配 光谱重构 航天遥感 

分 类 号：TP714[自动化与计算机技术—检测技术与自动化装置]