风云一号遥感器可见光通道大气程辐射之间的关系

The Relationships between the Atmospheric Path Radiances of the Four VisibleSpectral Channels at Fy-1 Satellite's Radiometer

本文利用光谱辐射计测量的大气程辐射资料,研究了相应于“风云一号”卫星上改进型甚高分辨率扫描辐射计(CAVHRR)4个可见光通道的大气程辐射量(N_a)之间的关系。结果表明它们满足((N_a(λ))/(N_a(λ_0)))=A(λ/λ_0)~B的关系。 经回归分析得:A为1.0887,B为3.6587。式中λ_0是CAVHRR第二通道的中心波长,即λ_0=0.875μm,λ是CAVHRR其他3个通道中心波长。

Atmospheric path radiances (Na) were respectively measured using spectral radiometer on ground in both Hangzhou and Kunming. The relationships which were between the atmospheric path radiances of the four visible spectral channels (centre wavelength respectively is 0.63μm, 0.875μm, 0.505μm and 0.555μm) at Fy-1 satellite's CAVHRR (corrective advanced very-high-resolution radiometer) were studied.They sufficed following relationship.A = 1.0887, B = 3.6587λ0 is CAVHRR' S centre wavelength of 2th channels, equal to 0. 875μm. λ is CAVHRR's centre wavelength of other three channels.