The picture shows early warning radar
Radar technology has been used in the military field for almost a hundred years. Many countries also have their own radar technology, and the types have become diverse. But what is the use of China’s 40-meter-high giant radar? ? Its height is comparable to a 12-story building, while ordinary radars are often only a few meters high. In order to obtain a 360-degree detection range, they are driven by a motor to rotate around an axis. However, this giant radar is too large in size and weight. , so it cannot rotate, but its powerful detection capabilities can provide a clear view of detection targets within 4,000 kilometers.
The picture shows the early warning radar
The principle of radar is not complicated. It emits electromagnetic waves into the atmosphere. When the electromagnetic waves encounter objects and reflect back, the signals are then collected by the receiver. By analyzing this step, the target's orientation and direction can be obtained. Distance, the wavelength at which radar works, can also be divided into 5 different frequency bands, namely P, L, S, C and X bands. The frequencies of these radar bands are getting faster and faster, but the wavelengths are constantly decreasing, such as X Although the wavelength band is the shortest, its detection accuracy is the highest. The disadvantage is that the detection distance is too short.
The picture shows the X-band radar
Generally speaking, the radar detection range will be affected by the curvature of the earth and often does not exceed 400 kilometers. However, this kind of radar can ignore the limitations of the earth's curvature and increase the detection range to 4,000 kilometers. And often detect in specific directions. For example, during the Cold War, the United States and the Soviet Union were equipped with high-power long-range early warning radars. These radars were mainly used to monitor the other side's missiles. Once the enemy launched a missile and attacked the country, any missiles on the country would be destroyed. The moment they reacted and started the counterattack process, it became their biggest concern.
Although there were already early warning satellites at that time, which could detect the infrared characteristics generated when missiles were launched, the early technology was not mature and was not as accurate as radar early warning. Therefore, the main force of early warning on both sides was still long-range radar. As a big country, China Considering national defense security, we naturally need our own long-range early warning radar, because this kind of radar only needs to know whether other countries have launched missiles and the general direction of missile flight, so as to prepare for whether our own side will launch a nuclear counterattack, so it has no accuracy. The requirements are too high, and P-band radar is enough to meet them.
The picture shows the early warning radar
The current main radars in the United States include the Sea Giant Eye and the Paving Claw. The Sea Giant Eye uses X-band radar and uses an semi-submersible ship as a platform. Usually only the radar is exposed to the water, and it can maneuver around the sea. , thus making up for the shortcomings of insufficient detection range. Therefore, X-band radar can not only play an early warning role, but can also get close to other countries to spy on intelligence. The real main force in early warning is the Pavement Claw radar, which the United States often deploys around potential opponents. Radar.
With the continuous improvement of China's national defense construction needs, missile early warning capabilities also need to be continuously strengthened. After all, only by detecting enemy missiles can the anti-missile system play its due role. Now China has achieved many anti-missile achievements. The successful interception test, coupled with the blessing of long-range early warning radar, is believed to be able to ensure national security.
