Abstract

The global warming is the most critical problem in the environmental issues. For accurate survey and prediction of the atmospheric warming, the three-dimensional, accurate and efficient remote sensing systems of the atmospheric temperature are crucially needed. Several lidar or laser radar techniques have already been developed for the temperature measurement of the upper atmosphere above stratosphere using density measurement by the Rayleigh scattering¹⁾, rotational Raman scattering^2,3) and differential absorption (DIAL)⁴⁾ method. These methods are almost difficult to apply in the troposphere below about 10 km altitude because of the present of intense Mie scattering due to particulate aerosols and the low efficiency in the Raman method. The high spectral resolution lidar (HSRL)⁵⁾ method with the Rayleigh scatter exhibits relatively stable temperature measurement in the troposphere using a visible laser and iodine molecular filters.

© 2001 IEEE