雷达论文，麻烦哪位高手帮我把下面这段话翻译成英文，谢谢

About Radar
The concept of radar formed in the early 20th century， before and after the Second World War was the rapid development. The principle of radar， the device is a transmitter antenna through the electromagnetic energy of a shooting at the direction of the space， in the direction of objects encountered reflection of electromagnetic waves; radar antenna to receive the reflected waves， to the receiving equipment to carry out processing， extraction The object was related to some of the information (the target objects to the distance between radar， or the rate of change from the radial velocity， location， height， etc.). CW radar and radar is divided into two major categories of radar pulses. Radar pulse as a result of easy to achieve precise location and receive echo in the resting pulse during the launch， the receiving antennas and antenna can be used to launch the same deputy antennas， and therefore in the development of radar in the main UN status. Measuring the distance is a measure of the actual launch with the pulse-echo pulse of the time difference between， as a result of electromagnetic waves in order to spread the speed of light， which can be converted into the precise distance from the target. The goal is to position the antenna to use sharp beam position measurement. Elevation on the narrow beam angle of elevation measurements. According to the elevation and distance will be able to calculate the target height. When the radar and the relative motion between the target， the radar echoes received by the target frequency radar and launch a different frequency， known as the difference between the Doppler frequency. From the Doppler frequency can be extracted from the main message is one of the radar and the distance between the target rate of change. When the goal of interference with the clutter at the same time present in the same spatial resolution of the radar unit， among them the use of Doppler radar frequency interference from the different clutter in the detection and tracking the target. Radar has the advantage of both day and night to detect long-range goals， and not subject to fog， cloud and rain to stop， with all-weather， all the characteristics and a certain degree of penetration. As a result， it has become not only essential military electronic equipment， and is widely used in socio-economic development (such as weather forecasting， resource exploration， environmental monitoring， etc.) and scientific research (study of celestial bodies， atmospheric physics， ionospheric structure， etc.). And on-board airborne synthetic aperture radar remote sensing has become a very important sensor. The spatial resolution of up to a few tens of meters， and has nothing to do with distance. Radar in the flood monitoring， sea ice monitoring， soil moisture survey of forest resources inventory， such as the Geological Survey shows a very good application potential.
用翻译机翻得。你改一下明显的错误，很快可以搞定