DIGITAL CHARACTERISTICS OF SPECTRA OF ECHO SIGNAL OF DOPPLER SODAR AND THEIR PICKUP

【摘要】 <正> Improving the data accuracy and picking up more imformation from the signals will make the potential power of Doppler sodar to be better realistic. The picking up of the second moment from echo spectra will make known more about atmospheric turbulence. It would be interesting to study the evolution of the mixed layers and gravity waves, etc. But the crosswind has a strong effect on the spectral width of back-scattered acoustic signals and the noise is another trouble. In this paper a method for better estimation of spectral parameters is described and the results prove to be meaningful.更多还原