Robert Watson Watt (1892 April 13 ~ 1973 February 5th) was named SirRobert. Scottish physicist who is famous for developing radar in Britain. 1935, he successfully developed a practical radar system.
Radar is an electronic device that uses electromagnetic waves to detect targets. The radar emits electromagnetic waves to illuminate the target and receives its echoes, thus obtaining information such as the distance from the target to the electromagnetic wave emission point, the rate of change of distance (radial speed), azimuth, altitude and so on.
Various radars have different specific uses and structures, but their basic forms are the same, including transmitter, transmitting antenna, receiver, receiving antenna, processing part and display. There are also auxiliary equipment such as power supply equipment, data acquisition equipment and anti-interference equipment.
Application of radar
The advantage of radar is that it can detect long-distance targets day and night without being blocked by fog, clouds and rain. It has the characteristics of all-weather and all-day, and has certain penetration ability.
Therefore, it is not only an indispensable military electronic equipment, but also widely used in social and economic development (such as weather forecast, resource exploration, environmental monitoring, etc.). ) and scientific research (celestial research, atmospheric physics, ionospheric structure research, etc. Spaceborne and airborne synthetic aperture radars have become very important sensors in remote sensing.
A radar targeting the ground can detect the precise shape of the ground. Its spatial resolution can reach several meters to tens of meters, regardless of distance. Radar also shows good application potential in flood monitoring, sea ice monitoring, soil moisture survey, forest resources inventory, geological survey and so on.