Panasenko S. Radio signal statistical characteristics variations of partition reflection radar caused by the dynamical processes in the mesosphere

The object is radio wave scattering on the moving irregularities of the lower ionosphere. Тhe purpose is determination of statistical characteristics of partition reflection radio signals and radio interferences, development of new methods and improvement of existing radio physical methods for determination and estimation of hydrodynamical motions as well as establishment of regional behavior of wind, waves and turbulence in the mesosphere. Тhe methods statistical radio physics methods, the theory of optimal detection and optimal estimation of signal parameters, the theory of remote sounding, aeronomy and plasma physics methods, statistical analysis, spectral analysis, simula-tion methods/ The new results are following. It is first established that the envelopes of partition reflection radio signals and radio interferences are distributed in 40 - 80 % cases in accordance with Poisson law. Two new (active and passive) radio physical methods for detection and estimation of wave disturbances pa-rametersin the mesosphere are developed. The new transformation is suggested which was named as adaptive Fourier transformation. The statistical ap-proach which is based on the algorithms of the theory of optimal detection and optimal estimation of signal parameters is first applied for detection of wave dis-turbances parameters in the mesosphere. Parameter values for horizontal wind velocity as well as for wave disturbances are obtained on the heights of 80 - 90 km for different time of day, season and magnetic activity level for the region of Central Europe.