Detection of Atmospheric Carbon Monoxide from a Shuttle-Borne Lidar.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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Remote sensing of carbon monoxide from a shuttle-borne differential absorption lidar DIAL was investigated. The primary lidar wavelength is in the infrared at 4.64 microns and takes advantage of a spectral coincidence between the R2 line in the fundamental absorption band of CO and the frequency-doubled R18 emission line of the CO2 laser. Extinction coefficients for CO, H2O, Rayleigh, and Mie scattering were determined in order to compute the return signal strength from various altitudes. Direct detection was found to be unsatisfactory, but heterodyne detection was found to be suitable if shot-averaging is used. With heterodyne detection the system was determined to be capable of making accurate measurements of CO in the troposphere, but performance in the stratosphere was found to be marginal.
- Atmospheric Physics
- Active and Passive Radar Detection and Equipment