SU1569759A1 - Radiolocational method of determining characteristics of wind velocity - Google Patents

Abstract

The invention relates to radar, to methods for remote determination of wind speed, and can be used to quickly diagnose synoptic processes. The method consists in irradiating the path with signals of two sources located at the first end of the path and separated by a known distance across the path, receiving these signals at two points located at the second end of the path and separated by the same distance as the sources, determining the coefficients of mutual correlations on converging and diverging paths, radio wave propagation, and calculating the cross-correlation coefficients of the transverse and angular components of the wind speed. 2 Il.

Description

The invention relates to radar, and in particular to methods for determining the wind speed on the track, and can be used for the rapid diagnosis of synoptic processes.

The aim of the invention is to determine the angular component of the wind speed on the track.

FIG. 1 shows the layout of the radiation sources and receivers, the paths formed and the geometrical values for the implementation of the proposed method; in fig. 2 is a block diagram of a device for implementing the proposed method.

The device implementing the method contains sources 1 and 2 of radiation with antenna devices, receivers 3 and 4, selectors 5-8 of signals passed through different paths, blocks 9 and 10 of determining the position of maxima of the mutually correlation functions and calculator 1 1.

The method is carried out as follows.

one oo with

SP

QD

The path is irradiated with a source signal located at one end of the path, signals are received at two points located at the other end of the path and separated by a distance L across the path, measured during the time T of amplitude signals fluctuations in the first A., (t) and second A (t) receiving points, simultaneously irradiate, the signal path of the second identical source spaced from the first across the path to the distance L, the signals of the second source at the first and second reception points are measured, the signal is measured during the amplitude fluctuation time T In the first A (t) and the second A (t) reception points, they determine the mutual correlation functions.

signals on parallel tracks

T-

Rp (t - Af (t) A4 (t +) dt

about

and intersecting routes

RC (O ™ Ј S Aa (t) A3 (t + Odt,

as well as the time intervals between

, with their maxima, and calculate

and,

mean values of transverse and angular components of wind speed for time T according to the formulas

 "- b, x V p (xM}

„2L, 1 L and),

35

) 2) 3

40

45

- IFIF Mpb,

25, Wed 1 4, i av2-H | zM / s p

 ) (1 + h (o) M +

ID -c5 i-c J Jé

D - path length |

Vy - the angular velocity of the vortex on

track, glad / s. The device that implements the method works as follows.

The signals from the outputs of sources 1 and 2 irradiate the troposphere. The scattered signals of the sources are fed to the inputs of receivers 3 and 4, the signals from the output of receiver 3 are fed to the inputs of selectors 7 and 8, and the signals from the output of receiver 4 to the inputs of selectors 5 and 6. The selectors separate the signals that have passed through different paths. To the input of the maxi position detection unit

0

0

five

0

35

40

45

A mutually correlated function 9 is supplied from the outputs of the selectors 6 and 7, From the outputs of blocks 9 and 10, the signals are fed to the calculator 11, where the transverse and angular components of the wind speed are calculated separately.

As radiation sources, two identical transmitters with antenna devices spaced across the path to the distance L, which emit .- pulsed electromagnetic energy with the same frequency of the radiation, can be used, for example, with different repetition frequencies of the emitted pulses, to ensure that the signals can be separated. , at the output of receivers passed on various routes.

Receiver-impulse units can be used as receivers, providing reception of pulsed electromagnetic energy in this wavelength range, with antenna devices spaced across the path for the same distance as transmitter antenna devices. Selectors for the source pulse repetition are connected to the receiver output. The outputs of which are connected to the device selection of the envelopes of a sequence of video pulses. Slowly varying fluctuating voltages corresponding to the envelope signals passed through different paths are fed to the inputs of the measuring units of the position of maxima of the mutual correlation functions, the values of the measured positions of the maxima of the mutually correlation functions are taken and fed to the calculator, which can be used any computing device.

Claims (1)

Invention Formula Radar method for determining the characteristics of wind speed on a path, based on the path being irradiated with a signal from a first source located at one end of the path, receiving signals at two points located at the other end of the path and spaced L distance across the path, measured in them during T the instantaneous amplitude values of the signals A ((t) at the first and A. (t) at the second reception points, which means that, in order to extend the functionality by determining the angular component of the wind speed, The trace is received by the signal of the second source spaced from the first across the path to the distance L, the signals of the second source A3 (t) in the first and A (t) are received at the second reception points, the correlation functions of the signals A (t) and A4 (t ), Aa (t) and A3 (t) s measure the time intervals between their maxima, respectively, and Cs calculate the average values for the transverse and angular components T of the wind speed using the formulas .Lt f X., FLLt f h w.hGm G. e. NF L 5S T | 4 / I P A V + {k; 1 + 5 (s:} J UTe0 6 tt . - 4 h, 1 1 П1 «гi P. + teF (1 + 5 (€;}} J) ;; D is the path length; -, V, - the angular velocity of the vortex on highway, glad / s; Vft - transverse wind speed. 1