Spectroscopic Method for Atmospheric Trace Species Measurement Using a Satellite Retroreflector (RIS).
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概要
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A simple and effective spectroscopic method based on earth-satellite-earth laser long path absorption measurements using RIS (Retroreflector-In-Space) on the ADEOS satellite, has been developed. This method utilize the Doppler shift of a reflected beam resulting from the satellite movement for measuring the atmospheric transmission spectra. The feasibility of a system using carbon dioxide lasers was evaluated by a computer simulation. The result shows that the vertical profiles of ozone, methane, and the column densities of CFC12, HNO<SUB>3</SUB>, CO and N<SUB>2</SUB>O can be measured by using the fundamental, second and third harmonics of TEA lasers with <SUP>12</SUP>C<SUP>16</SUP>O<SUB>2</SUB> and <SUP>13</SUP>C<SUP>16</SUP>O<SUB>2</SUB> isotopes. The signal-to-noise ratio of single shot optical detection is estimated to be 12-5000 depending on the satellite position for pulse energies of the fundamental, second and third harmonics of 100mJ, 10mJ, and 5mJ.
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社団法人 レーザー学会 | 論文
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