1. Science
  2. Publications
  3. Science and Technology of the Air Force of Ukraine
  4. 4(33)'2018
  5. Evaluation of influence of active interferences on the accuracy of evaluation of meteoroligal formations in pulsed doppler meteorological radar

Evaluation of influence of active interferences on the accuracy of evaluation of meteoroligal formations in pulsed doppler meteorological radar

D. Atamanskyi
Annotations languages:


Description: The accuracy of determining the parameters of reflections from meteorological formations by systems of inter-period signal processing in a pulsed Doppler meteorological radar (PDMR) with the practically possible influence of active interferences of natural and artificial origin is analyzed. To do this, the mode of separate spatial and temporal signal processing is substantiated. For the given conditions and model of processing, the correlation matrix of the input effects of the inter-period processing of the PDMR signals is determined. The elements of this correlation matrix contain information on the parameters of the reflection spectrum from meteorological formations, which, in turn, determine the meteorological characteristics of a formation and the level of its hazard. It is shown that the correlation matrix of the input effects of the inter- period processing system consists of co-relational matrices transformed at the stage of spatial processing of noise emissions from active-noise regulators, noise of spatial channels of reception, reflections from local objects and proper vibrations from meteorological formations. On the basis of the analysis of this matrix, the effect of active interferences on the accuracy of determination of meteorological parameters is investigated by systems of inter-period processing of the PDMR signals. It is shown that the interfering effect of the active interference is equivalent to the growth of internal noise of time channels of reception, which causes an increase in the errors of estimating the parameters of the reflections from the meteorological formations. A method is proposed for reducing the negative impact of active interference, which uses the frequently available practice to estimate the power of a mixture of active interference and internal noise of spatial reception channels. It is shown that this method significantly reduces the negative influence of the active interference and increases the accuracy of the determination of parameters of reflections from meteorological formations by systems of inter-period signal processing in the pulsed Doppler meteorological radars.


Keywords: meteorology, active interferences, correlation coefficient, pulsed Doppler meteorological radar

Reference:
 Atamanskyi, D.V. (2018), “Otsinka vplyvu aktyvnykh zavad na tochnist otsiniuvannia parametriv meteoutvoren v impulsnykh doplerivskykh meteorolohichnykh radiolokatorakh” [Evaluation of influence of active interferences on the accuracy of evaluation of meteoroligal formations in pulsed doppler meteorological radar], Science and Technology of the Air Force of Ukraine, No. 4(33), pp. 75-82. https://doi.org/10.30748/nitps.2018.33.10.