基于信号模拟的LAI最佳遥感探测波段设计方法

摘要

Based on the technologies of both object spectrum database and biological parametric models, the ground-object spectrum simulation signals were derived with the known LAI values. By use of computer simulation methods, effects of atmospheric condition and remote sensing detectors with assigned spectral sensitivity characteristics were simulated, and RS simulated signals on satellite level were produced. Furthermore, the performances of different sensors in detecting LAI were analyzed and compared, including CBERS-1, SPOT-1 HRV1, LANDSAT-5 TM and NOAA-14 AVHRR. Finally, on the criterion of LAI-detecting sensitivity, the paper designed and tested the best LAI-detecting band, and proposed the method of multiband remote sensing detectors parameter design based on digital simulated signal. The method has certain practical meanings in both the choices and optimums for sensor channels.%基于地物波谱库和生物参数模型技术,模拟生成具有已知LAI的地物光谱模拟信号,顾及到大气状况、遥感探测器光谱响应特性等因素的影响,采用计算机模拟技术模拟生成了星载传感器遥感模拟信号.在此基础上进一步分析了CBERS-1、SPOT-1 HRV1、LANDSAT-5 TM和NOAA-14 AVHRR传感器在探测LAI方面的性能差异.最后以对LAI的敏感性为准则,设计和模拟试验了LAI的最佳探测波段,提出了一种基于模拟信号的多波段遥感探测器参数设计方法.该方法对遥感器通道选择与优化设计具有一定的实用价值.