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pro vyhledávání: '"Karel Pitas"'
Publikováno v:
2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA).
This document describes automatic classification of targets detected by the FMICW radar. These targets are counted and sorted to three groups (incoming, outgoing and static targets). We derived this information from the output of the neural network w
Publikováno v:
2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA).
The height of rain and the zero isotherm height serves as an important parameter to define the satellite link length in the rain volume. This enables to estimate the important rain attenuation. We introduce 5 known models of rain height and computed
Autor:
Ondrej Fiser, Karel Pitas
Publikováno v:
2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA).
In this contribution the one year period of the rain rate measurement in the Czech Republic was analyzed. The measurement was located at the experimental site of the Institute of Atmospheric Physics in the town of Hradec Kralove. The measurement was
Autor:
Karel Pitas, Ondrej Fiser
Publikováno v:
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring).
In this contribution we discuss the possibilities of the distrometer or videodistrometer measurement. Firstly we describe briefly what outputs are given through the videodistrometer measurement: equivolumetric rain drop diameter, fall velocity, oblat
Autor:
Karel Pitas, Ondrej Fiser
Publikováno v:
2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA).
During first experiments with weather radar PCDR 35 a question of calibration arose. Comparing pixel measurement with the measurement of the same pixel by operational radar we estimated the radar constant to be C 3 = 2. 62∙108, which is tuned to th
Autor:
Dong Si Thien Chau, Pavel Chmelar, Karel Pitas, Pavel Bezousek, Lubos Rejfek, Ondrej Fiser, Phuong T. Tran
Publikováno v:
2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA).
In this paper, FMICW radars and processing of the signals from these systems are described. Main part of the paper is a system for automatic analysis of the signals. An algorithm is applied on the two-dimensional Fast Fourier Transform. In paper, the
Publikováno v:
2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA).
In this paper is described the measurement of the Total Electron Content by the single-frequency GPS receiver. Disadvantage of this method is that it cannot be used for real-time processing. The advantages of the proposed method are that the device i