Two‐frequency Lidar technique for mesospheric Na temperature measurements

C. Y. She, H. Latifi, J. R. Yu, R. J. Alvarez, R. E. Bills, C. S. Gardner

doi:10.1029/gl017i007p00929

Two‐frequency Lidar technique for mesospheric Na temperature measurements

DOI Web Site Web Site 被引用文献11件

書誌事項

公開日: 1990-06

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/gl017i007p00929

公開者: American Geophysical Union (AGU)

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説明

<jats:p>We describe a new two‐frequency lidar for measuring Na temperature profiles that uses a stabilized cw single‐mode dye laser oscillator (rms frequency jitter < 1 MH<jats:sub>z</jats:sub>) followed by a pulsed‐dye power amplifier (140 MHz FWHM linewidth) which is pumped by an injection‐locked Nd: YAG laser. The laser oscillator is tuned to the two operating frequencies by observing the Doppler‐free structure of the Na D<jats:sub>2</jats:sub> fluorescence spectrum in a vapor cell. The lidar technique and our initial observations of the temperature profile between 82 and 102 km at Ft. Collins, CO (40.6°N,105°W) are described. Absolute temperature accuracies at the Na layer peak of better than ±3 K with a vertical resolution of 1 km and an integration period of approximately 5 min were achieved.</jats:p>