The simulation of the linear object

 

(57) Abstract:

The invention relates to a method of masking troops and objects and can be used to simulate in radar wavelength range and protection against high-precision weapons long linear features in winter conditions. The method allows to increase the efficiency of disguise and imitation of extended objects in winter conditions. The invention consists in that the surface of the ice clear of snow cover and align, then a layer of ice make longitudinal or transverse grooves V-shaped with the angle of aperture 90oand on side surfaces of the grooves put a layer of electrically conductive composition. The axis of symmetry of the grooves have a perpendicular purified and aligned with the surface of the ice. 3 C.p. f-crystals, 4 Il.

The invention relates to the field of camouflage troops and objects and can be used to simulate in radar) range of wavelengths and protection against high-precision weapons, equipped with radar homing, long linear features, such as bridges, bridge crossings, dams, dams and other in winter conditions.

The known method simulation of linear objects such as soil, ice, water surface) separate radar reflectors (SART) in increments not exceeding range resolution (or azimuth) of the probing radar (radar). This method is described in the sources of information [1, 2, 3] and is the prototype.

As disadvantages of this method (prototype) the following should be noted. The method is rather time-consuming and requires substantial investment of time to prepare for the installation and the installation manually SART. At the same time to ensure the effectiveness of simulation required to strictly keep to a specific step of the installation. If this does not match the orientation of the individual SART, for example due to strong winds, currents, or so forth, relative to the radar indicator station or radar images can be failures in the formation of a simulated continuous linear image of the object, thus reducing the probability of making the simulated false for the true. In addition, it is known that used to simulate object trihedral corner reflectors GRI application for reconnaissance purposes of cross-polarization radar signals, for example with circular polarization with a parallel reception, do not give the mark on the indicator is promyshlennogo manufacturing, so may not always be available or sufficient in the army.

The present invention aims at improving the efficiency of disguise and imitation in winter conditions extended linear facilities, located mostly on the water obstacles, using available resources, tools, and materials.

The solution of the stated technical problem is achieved by the fact that in the proposed method, which consists in placing on the surface of the ice radar reflectors, the ice surface is pre-cleaned from snow and level, then in a layer of ice make parallel grooves V-shaped with the angle of aperture 90oand on side surfaces of the grooves put a layer of electrically conductive composition.

To ensure the sustainability of the reflector from external influences and increasing time finding it in working condition after applying the electrically conductive composition of the grooves fill with snow or ice.

To increase the detection probability of the simulated linear object with corners sensing radar, close to the small, out of every three parallel furrows two adjacent furrows perform the offset direction may allow more uniform reception and reflection of radio waves from any direction (azimuth) of the furrows on the surface of the ice feature in the form of a continuous "snake".

In Fig. 1 shows in General form type formed on the surface of the ice in the described action of the grooves in the form of extended dihedral radar reflector. In Fig. 2 shows a similar reflector (in section) filled with snow (ice). In Fig. 3 shows three adjacent grooves, characterized by the direction of their aperture (according to p. 3 claims). In Fig. 4 schematically shows an arrangement of grooves in the form of a continuous "snake".

On these figures the numbers denote: 1 - ice; 2 - snow; 3 - water; 4 - grooves V-shaped with the angle of aperture 90o, 5 - side surface (edge) of the formed furrow; 6 - conductive layer.

The proposed method is implemented by execution of a particular sequence of actions is as follows.

Original ice platform, which assumes the formation of extended radar reflector to simulate the linear object is rendered. To do this, first the surface of the ice with machines equipped with a bulldozer or universal waste, or manually using cleaning equipment is removed in the direction of the layer of snow (snow cover). Then using those W is sootvetstvujushej form, the layer of ice make (cut) a longitudinal and / or transverse grooves. Furrow perform V-shaped. In this case the angle between the side surfaces (faces) of furrows withstand 90oand the axis of symmetry of the grooves have a perpendicular purified and aligned with the surface of the ice.

Then, using the appropriate equipment for spraying or manually on side surfaces of the grooves put a layer of electrically conductive composition. As the electroconductive composition, ensuring the reflection of waves from the side surfaces (faces) can be used, for example, aluminum or bronze powder in powder form.

Thus, on the surface of ice is formed extended dihedral radar reflector (Fig. 1) simulating a linear object.

It is known that the structure of ice, snow and water mixture will be permeable to electromagnetic waves, and that these surfaces for radio waves length = 0,8...3.2 cm at the corners of the sensing SART relative to the surface 0o45owill be almost a mirror reflection of radio waves even for differently oriented elementary flat areas, and at angles sodirova the surface of the ice creates sustainable reflected signal, providing significant radar contrast between simulated object and the underlying surface (background). Moreover, if the effective specific surface scattering (EPR) ice on the element resolution radar will be practically negligible, then the maximum ESR of only one reflector in the form of one continuous furrows on the same item resolution calculated by the formula [4]

< / BR>
where S is the area of the face of the reflector: - wavelength radar, if the width of the verge of a = 5 cm, length of element permissions 1 = 5 m and wavelength = 3.2 cm will be 1533,2 m2.

Co-hosting three furrows sizes specified maximum total EPR will be about 4600 m2. These values are comparable to the EPR trihedral corner reflectors used in the prototype. Moreover, the dihedral corner reflector unlike trihedral will have the same EPR on horizontal, vertical and two circular polarizations in parallel, and on sloping polarizations [4].

Thus, the proposed method provides a higher efficiency of imitation of a number of long linear features in winter conditions.

To provide the input voltage to it in a good condition after applying the conductive composition on the side surfaces of the grooves can be filled with snow or ice (Fig. 2), which, as is well known [5] , have the lowest average dielectric constant = 1,2...4 and, thus, cannot have a significant impact on the amount of WIA reflector.

It is also known that the angle at which the EPR dihedral reflector is equal to not less than 0.5 of the maximum value of ESR is just 30o[4]. Therefore, to enhance the detection of simulated linear object with corners sensing radar, close to small, i.e., 15offers out of every three parallel furrows (reflectors) two adjacent grooves with respect to the Central run with the offset direction of maximum scattering phase function on the 30oin different directions (Fig. 3). That is extreme furrow proposed to do with asymmetrical faces and inclined faces 30oon respective sides of the middle furrow. Thereby, it is possible to extend the indicatrix of scattering reflectors at the level of half the EPR in the plane of symmetry of the Central (middle) of the furrow and to increase the probability of detection.

To enable a more uniform from any direction (azimuth) of reception and reflection of radio waves grooves include using existing devices, tools and materials. The method may be further implemented and used also in other fields, such as aviation radar or navigation to identify the limits of the ice airfields, as passive radar beacons and other

Sources of information

1. Paly A. I. Electronic warfare. - 2nd ed., Rev. and supplementary): Voenizdat, 1989, 138-139 C. (prototype).

2. Instructions for use of corner reflectors WMD. - M.: Voenizdat, 1960, S. 12-16.

3. Levacic N. F. The disguise. - M.: Moscow state University, 1982, S. 50-55.

4. Kobak C. O. Radar reflectors. - M.: Owls. radio, 1975, S. 138, 181.

5. Krasyuk N. P., Koblov B. N., Krasyuk Century. N. The influence of the troposphere and the underlying surface on the radar operation. - M.: Radio and communication, 1988, S. 82, 115, 116.

1. The simulation of the linear object, which consists in placing on the surface of the ice radar reflectors, characterized in that the ice surface is pre-cleaned from snow and level, then in a layer of ice make parallel grooves V-shaped with the angle of aperture 90oand on side surfaces of the grooves put a layer of electrically conductive composition.

2. The simulation of the linear object under item 1, different Way to simulate linear object under item 1, characterized in that each of the three parallel furrows two adjacent grooves with respect to the Central comply with an offset direction of maximum scattering phase function on the 30oin different directions.

4. The simulation of the linear object under item 1, characterized in that the grooves on the surface of the ice feature in the form of a continuous "snake".

 

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SUBSTANCE: the method consists in the fact that colored or uncolored foam is continuously or periodically applied onto the water surface upstream the water section or onto the water basin section having no stream. The starting foaming solution, foam ratio, as well as the device for realization of the method are described. The device includes a reservoir connected through a liquid channel to a pump and unspotters located across or in the area of the water basin.

EFFECT: improved camouflage properties of the water surface.

13 cl, 8 dwg, 3 ex, 1 tbl

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