Atmospheric Windows

The general atmospheric transmittance across the whole spectrum of wavelengths is shown in Figure 6. The atmosphere selectively transmits energy of certain wavelengths. The spectral bands for which the atmosphere is relatively transparent are known as atmospheric windows. Atmospheric windows are present in the visible part (.4 ^m - .76 ^m) and the infrared regions of the EM spectrum. In the visible part transmission is mainly effected by ozone absorption and by molecular scattering. The atmosphere is transparent again beyond about X= 1mm, the region used for microwave remote sensing.

Wavelength

Figure 6 : Atmospheric windows

Wavelength

Figure 6 : Atmospheric windows

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