正确识别水面上的观测值,对于利用ICESat/GLAS卫星激光测高数据监测内陆水系和确定海冰覆盖区的海面高的研究具有重要意义。通过对ICESat/GLAS在水面的回波波形特性的分析,并考虑波形饱和与大气前向散射对波形的影响,提出了根据GLA14数据中提供的回波波形参数识别ICESat/GLAS水面测高数据的方法。测试结果表明,该方法的正确率可达90%以上,可以为内陆水体监测提供有效的支持和帮助。
Abstract
Accurately identifying water observations is quite important for researches of inland hydrographic net monitoring and sea surface height determination in ice-covered ocean with satellite laser altimetry observations of ICESat/GLAS. By analyzing the features of waveform from ICESat/GLAS observation upon water and taking the effect of saturation and forward scattering into account, an automatic method of identifying ICESat/GLAS observations upon water with waveform parameters provided in GLA14 data set is proposed. Test results suggest that the accuracy of the proposed method is over 90%, hence providing effective support and help for inland water monitoring.
关键词
ICESat/GLAS /
波形 /
反射率 /
脉冲宽度 /
峰态 /
偏度
Key words
ICESat/GLAS /
waveform /
reflectivity /
pulse width /
kurtosis /
skewness
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参考文献
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