As the air temperature rises, the molecules vibrate faster. This is realized in the return signal by a broader wavelength region. You cannot analyze the aerosol component of the return when measuring temperature. Aerosols do not vibrate at the same rate as air molecules. You must solely rely on the molecular return, or else you will experience great errors in your measurements.
Air density is determined by the integral magnitude of the molecular signal return.
You cannot analyze the aerosol component of the return when measuring density. The density of aerosols does not represent the density of the air molecules. You must solely rely on the molecular return, or else you will experience great errors in your measurements. Air pressure is simply derived from the temperature and density measurements. We normally use a CCD as the detector.