Aerosol emission for biological aerosol clouds: implications to passive IR remote sensing

We present a simple scaling of the SNR plots for the minimum required SNRfor detecting the emission from an aerosol cloud. The required SNR for the detection of aerosol thermal emission is quite high, in the order of i03 to iO' (depends on the temperature difference and the depth of the cloud) but can be achieved with state of the art sensors equipped with large apertures and utilizing sufficient averaging.