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太湖遥感反射率变化特征及其影响因素分析

DOI: 10.6046/gtzyyg.2011.04.19, PP. 100-107

Keywords: 遥感反射率,散射系数,吸收系数,光场分布,太阳天顶角

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Abstract:

基于2010年10月4-8日在太湖全湖范围32个样点的水体光学参数和理论数值模拟结果,研究了太阳天顶角θ、散射系数和吸收系数的比值b/a及表征光场分布的参数Q对太湖遥感反射率变化的影响。结果表明,遥感反射率随θ的增大而增大,且当θ较小(0°~20°)或较大(80°~89°)时,其变化对遥感反射率增幅的影响较小;当b/a增大时,遥感反射率也随之增大,二者变化趋势呈显著正相关;Q较大时(如6~7),其变化对遥感反射率增幅的影响较小;Q较小时(如2~3),其变化对遥感反射率增幅的影响明显;遥感反射率随Q的增大呈递减的趋势。

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