SU1638689A1 - Troposphere perturbation determination method - Google Patents

Abstract

This invention relates to radio meteorology. It can be used to continuously monitor the coordinates and direction of movement of the frontal systems, their scale and speed of movement. The aim of the invention is to increase the information content and accuracy of forecasting of tropospheric disturbances. By changing the characteristics in time and space, the place of occurrence of tropospheric disturbances, their intensity, size and direction of movement are recorded. 3 il.

Description

The invention relates to radio meteorology and can be used to monitor the dynamic parameters of atmospheric frontal systems.

The aim of the invention is to increase the information content of the method.

Fig. 1 shows examples of amplitude-time variations of the vertical component of the electric field EZ, the envelope of the low frequency (VLF) radiation intensity at a frequency of 8 kHz, and variations in the atmospheric pressure DR; figure 2 - amplitude-time (vV) (EV) E +

 uv - | ™ - + (vV) E - d (EV) v

where v is the air flow rate

Q and viscosity media v:

E2, DR, and VLF radiation characteristics at 3 Hz; FIG. 3 is an example of a dynamic spectrum of VLF radiation. The generation of the quasistatic field Ez and the accompanying radiation can be based on the mechanism of polarization of the dielectric medium in its complex three-dimensional motion. In our case, the dielectric medium with low conductivity is air. We can, by neglecting the compressibility of the medium, write the equation of electrodynamics as

Thu% -}

 -476 E,

(ABOUT

oe with

oo with &

00

with

E is the intensity of the electric field; B, a and d are dimensionless constants depending on electrical

environment settings.

To make you mutually inter-r influence d

the flow of air and electric Q, bounded by the surface of someone's floor, multiply the first of equation-s. Then we get

(1) on pv, and the second on

E and integrate on

 d

(1) on pv, and the second on

E and integrate by volume

l

dt j 2 dQ si Ь I E; D; KEK (rot v) 2dЈ +

+ Pv; + v. + Ј. b (Ev) E. Јv rot

df 7G, i- i J g

+ 5 d J

, i E vdS, d J

five

where Divc 9 v; / 3xK + 3vK / 9x ;.

Equations (2) and (3) determine the change in the energy of motion of the medium and the energy of the electric field with the interdependent behavior of the medium and the field. It is the surface integrals in (2) and (3) that characterize the change in energy due to its transfer (extension) across the boundary S to the volume element Q under consideration. The second volume integrals in (2) and (3) are strictly negative and therefore describe the decrease in energy as a result dissipation due to viscosity and conductivity of the medium. And only the first terms (volume integrals) on the right in (2) and (3) describe the energy transfer between the currents of the air dielectric medium and the electric field in a closed system o Energy transfer rate, which characterizes the degree of instability or the generation of an electric field due to the medium motion and vice versa) is determined by the value E1ID; XEK. Hence the important conclusion: the generation (destruction) of electric

 JE; Di | (EKdQ | (v E rot E dQ + f (v E) E; - - E% 1

Consequently, the degree of change of the electric field in a closed system turns out to be proportional to rot E, i.e. generation, for example, most easily occurs for strongly vortex electric fields. This means that the process of generation (annihilation) of a quasi static electric field during the motion of a dielectric medium is inevitably accompanied (2)

(3)

0

five .

0

five

the second floor is possible only in the presence of a differentiated motion of the medium, since in this case the components of the strain rate tensor 9v; / 9x + 9vk / 9x; are different from zero. The generation or annihilation of a quasistatic electric field depends on the positivity or negativity of the integral value of K and is determined, therefore, by the mutual configuration of the medium flow and the electric field. For example, it can be stated that they will generate electric fields directed along the eigenvectors of the DJK matrix corresponding to a positive eigenvalue . In this case, for a closed system (when the surface integrals disappear), the growth of the field is determined, as it follows from (3), by the equation

--- E2dQ (Л - 4иЈ) J E2 dC, (4).

The qualitative nature of the generated electric field can be estimated using the identity

dS

(five)

is emitted by electromagnetic radiation. The frequency of such radiation can be estimated in the case of a closed system, based on (3), (5) and the equation H / 3t + crot E 0, so

and gt ft (6

where V is the characteristic value of the velocity of the differentiated flow of the medium;

J163

c is the speed of light;

Е „is the integral value of the square of the electric field intensity o

Thus, the frequency of electromagnetic radiation from the region of the differentiated motion of a dielectric medium (the region of generation of a quasistatic electric field) varies with time. Such a change is quite confident on the sonograms. As an example, a sonogram is shown in FIG. 3, which at each instant determines the frequency spectrum of the recorded electromagnetic signals. Curves, indicated by arrows, give the frequency dependence of time for a certain signal.

There is a relationship between the movements of the dielectric medium (in this case air) and the generation of a quasistatic electric field and electromagnetic radiation. Equations (4) and (6) establish the relationship between the motion parameters in the focus, such as the characteristic velocity V of the differentiated flow of the medium and the character

the dimensions L of this flow, with the degree of growth ((iE2 / dt) / Eg of the quasistatic electric field and the frequency GD of the electromagnetic radiation, since it can be argued that E; D; KE K- (V / L) EZ.nPH is polarized electromagnetic radiation is determined by the direction of the generated quasistatic electric field and thus the main axes of the differentiated motion of the medium in the center, and the direction to the center is the direction of arrival of the electromagnetic radiation about

A method for predicting tropospheric disturbances is carried out as follows.

Claims (1)

The direction of arrival of the electromagnetic radiation is determined, which gives direction to the source of disturbance. The location of the disturbance is recorded at two receiving stations. Changing the frequency of the radiation over time using scans (Fig. 3) allows determining the characteristic velocity of the medium in the center and the intensity of the change of the generated quasistatic electric field. By measuring the polarization of electromagnetic radiation, the main directions of the differentiated motion of the medium in the source are judged. An independent measurement of the electric field and its degree of change provides information on the characteristic velocities and characteristic sizes of disturbances in accordance with expression (4). The independent measurement of the pressure drop (Figures L and 2) makes it possible to further determine the characteristic speed and thereby more accurately record the intensity and size of tropospheric disturbances. Invention Formula The method of determining tropospheric disturbances, in which continuous reception of electromagnetic radiation in two directions intersecting in the troposphere is made, determines the dependence of the amplitude of electromagnetic radiation on frequency and processes the measurement results, characterized in that, in order to increase the informability of the method, atmospheric pressure values, vertical the components of the electric field in the air and the polarization of the electromagnetic radiation, determine the changes in the measured values, and when processing the measurement results estimate the intensity, size and direction of movement of the tropospheric disturbance. L ““ “No gig ) tt FIG. i 910H12ttM15 9g 2 I ny I KOmtap I SHITS AND I | MW / p IS miiUr IOOmkbor 11, iflff i- UT (S8 ° 02 c.uj.38020 8j) well & ь  tg ABOUT Editor M Tsitkina Compiled by E.Trofimov Tehred S. Migunova Proofreader A.0saulenko Order 927 Circulation 270 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 FIG. t, c Subscription