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  5. Influence of the reflection from the local objects on the accuracy of the meteoring parameter estimation in the impulse Doppler weather radar

Influence of the reflection from the local objects on the accuracy of the meteoring parameter estimation in the impulse Doppler weather radar

D. Atamanskiy
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Description: The accuracy of the meteoring (M) parameter determination by the systems of the interperiod processing (SIP) of the signal of the impulse Doppler weather radar is considered in conditions of the interrupting influence of the reflections from the local objects (LO). The techniques and results of the analytical and experimental comparison of the accuracy of meteoring parameter evaluation are described when the reflections from the local objects are suppressed by the surge suppression rfi filters of the different structure. It has been shown that the effect of its use depended on the median radial speed of the local objects (LO), spectral bandwidth (turbulence) of the local objects, parameters and structure of the surge suppression rfi filters (SSF). It has been found that the metering error of the parameters of the local objects (LO) had been reduced proportionally to the steepening and depth of the rejection zone of the SSF if the spectra of the local objects had been beyond that zone. The errors had increased significantly if that spectra had been inside the filter rejection zone. The recommendations have been provided as to the choice of the SSF and its use in the SIPs of the existing and perspective impulse doppler weather radars. It has been shown that due to the difficulties of choosing the parameters of the SSF, the SIP must be complemented with the set of filters with different parameters and the possibility to switch on every filter in the SIP promptly.


Keywords: meteoring, local objects, surge suppression filter, correlation coefficient, impulse Doppler weather radar

Reference:
Atamanskyi, D.V. (2018), “Vplyv vidbyttiv vid mistsevykh predmetiv na tochnist otsiniuvannia parametriv meteoutvoren v impulsnykh DMRL” [Influence of the reflection from the local objects on the accuracy of the meteoring parameter estimation in the impulse Doppler weather radar], Science and Technology of the Air Force of Ukraine, No. 2(31), pp. 79-87. https://doi.org/10.30748/nitps.2018.31.10.