Тolstykh Y. Improvement of models and methods of radio acoustic sensing of the atmosphere

Object – the process of sounding the atmosphere with acoustic and electromagnetic waves. Aim – improvement of models and methods of radio-acoustic sensing (RAS) of the atmosphere, which will increase the accuracy of the atmospheric characteristics measurement and determine the qualitative factors of their measurement. Subject – models and methods of radio-acoustic sensing of the atmosphere by RAS systems and analysis of their quality indicators. Methods – the theory of statistical decisions for the synthesis of optimal algorithms for signal processing of RAS systems, the theory of wave propagation in a turbulent atmosphere, the methods of the theory of optimal linear filtration, numerical methods of analysis, computer simulation. Results – new effective methods for measuring the velocity of vertical and horizontal winds by RAS systems, which differ from the known methods by using the combined processing of scattered signals both Doppler and correlation are proposed. these methods allow to expand the possibilities of RAS systems for extracting new information from the data of radio-acoustic sensing of the atmosphere; for the first time a new method of reception and processing of signals in the RAS systems of the atmosphere was proposed. this method is based on the passive radar of spots of scattered electromagnetic oscillations, focused on the spherical wave fronts of the acoustic packet. the novelty of the method is to receive a scattered signal, when wearing the packet of acoustic waves by wind, other than the known methods using the matrix of receiving antennas, one receiving antenna is used; the new method of metrological certification of RAS systems is proposed, which, unlike the known ones, is based on the metrological attestation of the main devices of the system, which determine the measurement error of the information parameter of the reflected signal of the system; the method of filtering the "instant" temperature profiles obtained by the RAS system is improved, which, unlike the known, allows to significantly reduce the time spent on obtaining temperature profiles with the required reliability. Implementation – in scientific research activities at NURE (Kharkiv). Application – development of radio-acoustic sensing systems of the atmosphere