不同厚度海上油膜高光谱遥感波段敏感性研究

Study on the sensitivity of hyper-spectral imagery to detect oil film with different thickness

利用地物反射率光谱结合星载高光谱遥感环境噪声估计法,研究了星载高光谱遥感数据对较薄、中等、较厚原油油膜的响应特性,并提出了敏感波段.结果表明:对于较薄油膜(10μm和50μm),Hyperion传感器的第8—52波段能够有效识别;对300μm和1 000μm的中等厚度油膜,Hyperion传感器的探测通道为第26—53波段;对于1 500μm和2 000μm的较厚油膜,Hyperion的第15—23波段以及第27—49波段数据探测性能较好.

The reflectance of water and different crude oil film thickness was measured in this study. The spectral response functions of Hyperion sensor was used for filtering the measured reflectance to the theoretic spectral response. Then, these spectral response spectra were normalized to environmental noise equivalent reflectance. Final, subtract the environmental noise equivalent reflectance between crude oil film and water, according to which, the sensitivity of the sensor in oil film detecting could be evaluated. For thin oil film（10 μm and 50 μm）,the range for Hyperion sensor to identify the film is within the Band 8 to Band 52. Band 26-53 of Hyperion sensor are the most efficient ones to monitor the medium oi film（300 μm and 1 000 μm）. For thick oil film（1 500 μm and 2 000 μm）, the range for Hyperion sensor to identify the film is within the wavelength from Band 15-23 and Band 27-49.