RU25098U1 - SYSTEM FOR DETECTION AND MEASUREMENT OF COORDINATES OF GOALS - Google Patents

Description

A system for detecting and measuring target coordinates.

A utility model relates to the field of radar, specifically to diversity radar systems.

A known system for detecting and measuring coordinates of targets. The theoretical basis of radar. /Under. ed. POISON. Shirman. - M.: Sov. Radio, 1970, p. 274-310, containing a transmitter of pulsed radio signals and spaced receiving devices connected to a common center for processing radio signals by communication lines. At the same time, the transmitter and spaced receiving devices are installed on ground-based equipment in the form of stationary transmitting and receiving stations with remote or extendable antennas, and the communication lines are made by cable.

A disadvantage of the known system is the insufficient size of its detection zone, due to the curvature of the Earth's surface.

The basis of this utility model is the task of creating a system for detecting and measuring coordinates of targets, the design of which allows you to increase the size of its target detection zone.

The solution of this problem is achieved by the fact that in the system for detecting and measuring the coordinates of targets containing a transmitter of pulsed radio signals and spaced receiving devices connected to a common center for processing radio signals by radio links, according to a utility model, the transmitter is mounted on

a spacecraft with a geostationary or near-Earth orbit.

In this case, the receiving devices of the system are made stationary or mobile. Mobile receiving devices are installed on water, land or air transport, and communication lines are made in the form of digital radio links.

Maintaining these differences allows you to reduce the effect of the Earth's curvature on the target detection process and, thereby, increase the size of the system’s detection zone.

In FIG. A functional diagram of a system for detecting and measuring the coordinates of targets with the size of a transmitter on a spacecraft with a geostationary orbit is presented.

The system comprises a transmitter 1 of pulsed radio signals mounted on a spacecraft with a geostationary or near-earth orbit. The transmitting radiation pattern 3 of the transmitter 1 is aligned with the total field of view of the spaced receiving devices 4. The receiving devices 4 are stationary 5 or mobile. Mobile receiving devices are installed on water 7, land 8 or air (not shown in the figure) transport. Diversity receiving devices 4 comprise a series-connected antenna, a digital radio receiver, a computing unit, and a radar information transmission unit. The output of the radar information transmission unit of each of the devices 4 is connected to a common center 9 for processing radio signals by radio links 10. The center 9 for processing radio signals is made in the form of a stationary station containing

serially connected transceiver device 11, computing means for calculating coordinates and identifying targets, as well as means for displaying radar information.

The system operates as follows. The transmitter 1 of the spacecraft 2 with a given frequency, for example 400 Hz, generates short sounding radio pulses irradiating the air space of the Earth in the angular sector 3. These radio pulses are received by spaced receiving devices 4 and are used to synchronously open their amplification paths for the required time of receiving signals from the target between probing signals, In the case of the appearance in sector 3 of target 12, which reflects the signals of transmitter 1, the diffuse signal from target 12 passes through the amplification path of the receiving devices 4, in the zone of their goal of sight 12. In the receiving device 4, receive signals from the target 12, measured angular direction of the target point relative to the location of spaced receivers 4, the time delay and Doppler frequency of the multipath signal relative to the probe. Information about the goals and coordinates of the receiving devices 4 are transmitted from the latter via lines 10 in the form of pulse-code sequences of radio pulses to station 9. At station 9 (based on the data of the separated receiving devices 4 about the relative coordinates of the targets, the absolute values of the coordinates of the receiving devices 4 and the parameters received signals), the identification of targets, the calculation of the absolute coordinates, speed and trajectory of the movement of goals.

The calculated target parameters are transmitted to the means for displaying radar information of the center 9.

This utility model is not limited to the above example of its implementation. Within the framework of this utility model, another constructive solution of the system is also possible. The communication lines 10 between the center 9 and the devices 5 diversity can be performed using repeaters. The transmitter 1 can be installed on one or more spacecraft (satellites) 2 not with a geostationary, but with near-Earth orbit. In this case, when the next satellite 2 enters the zone of responsibility of the system, its transmitter 1 is launched into the pulse generation mode from the transmitter 11 of station 9. The transmitter 1 is turned off in the same manner when satellite 2 leaves the zone of responsibility of the system.

Claims (3)

1. A system for detecting and measuring coordinates of targets, comprising a transmitter of pulsed radio signals and spaced receiving devices connected to a common center for processing radio signals by communication lines, characterized in that the transmitter is mounted on a spacecraft with a geostationary or near-Earth orbit.  2. The system according to claim 1, characterized in that the receiving devices are stationary and / or mobile. 3. The system according to claim 3, characterized in that the mobile receiving devices are installed on water, land or air transport.