How does the cloud radar at Daxing Airport escort the aircraft?

13, Beijing Daxing International Airport ushered in the real test flight of four planes. The reporter learned from No.23 Institute of the Second Hospital of China Aerospace Science and Industry Group that the first cloud radar of China Civil Aviation at Daxing Airport has also been installed and will soon enter the business operation.

This Ka-band all-solid-state millimeter-wave cloud radar customized by 23 companies for Daxing Airport can accurately observe clouds, fog, snow and weak precipitation within 60 kilometers around the airport, and obtain data information such as cloud height, water content and particle phase (whether there is water as ice in the cloud). Combined with weather radar, wind profile radar and other equipment, the accuracy of airport weather forecast is improved, which is harmful to aircraft navigation safety.

In addition, two boundary layer wind profiler radars and 1 low tropospheric wind profiler radars developed by 23 research institutes are also expected to be completed in the near future, which will provide more data services for the flight safety of Daxing Airport together with cloud radar.

It is understood that since the development of China's first ground-based cloud radar was completed in 2007, 23 has formed a series of products in the field of millimeter-wave cloud radar, and has provided more than 30 kinds of radar products for meteorological departments, scientific research institutes, universities and other users.

Whenever we hear the words "microwave" and "photon", it always gives people a high sense of science and technology. Just recently, a domestic news once again refreshed our great progress in domestic related research. According to the Science and Technology Daily, on April 27th, at the 20 19 National Symposium on Microwave Photonic Radar Technology, Pan Shilong, vice president of the School of Electronic Information Engineering of Nanjing University of Aeronautics and Astronautics and deputy director of the Key Laboratory of Radar Imaging and Microwave Photonic Technology of the Ministry of Education, told the reporter that China has made great progress in some technical fields of microwave photonic radar, and the resolution of imaging radar reaches 1.3 cm, which is ahead of other countries.

So what is a photon radar? How does it help our national defense security? As we all know, radar is the main means for modern human beings to detect and identify targets rain or shine. The detection mechanism of ordinary radar is mainly to detect targets by emitting electromagnetic waves, that is, "microwaves". But the electromagnetic wave itself still has some defects.

At present, the increasingly complex battlefield environment requires radar to search for both long-range targets and short-range targets. It can not only detect low-altitude targets, but also indicate them. It can not only search and track multiple targets, but also conduct guidance and navigation. It can not only easily identify strong targets, but also effectively detect low, slow, fast, small and hidden low observable targets. It is difficult for traditional radar to detect this. Compared with ordinary electromagnetic waves, microwave photon technology has great advantages. Microwave photon technology can provide arbitrary waveforms with high frequency and multi-frequency, which is unmatched by traditional electromagnetic wave transmitting equipment. At the same time, the size of the equipment for generating microwave photons is much smaller than that of the traditional electromagnetic wave radar.