What is the safe distance between the weather radar tower and the residential area?

The intensity of electromagnetic radiation is inversely proportional to the square of distance. The safety value of electromagnetic radiation intensity stipulated by the Ministry of Health is 17 microwatts/cm2. Therefore, it depends on the transmission power of the excited base station. Generally speaking, if the feeding surface of the base station is facing home, there is no obstacle in the middle, and the distance should be at least 50 meters.

Extended data:

Weather radar uses a wide range of radio wavelengths, from 1 cm to 1000 cm. They are usually divided into different bands to represent the main functions of radar. The wavelengths of 1, 3, 5, 10 and 20cm commonly used in weather radar correspond to K-band (wavelength 0.75 ~ 2.4cm), X-band (wavelength 2.4 ~ 3.75cm) and C-band (wavelength 3.75 ~ 7.5cm) respectively.

In S-band (wavelength 7.5 ~ 15cm) and L-band (wavelength 15 ~ 30cm), the wavelength ranges of UHF and VHF radars are 10 ~ 100cm and100 ~1respectively. The performance of radar in detecting atmospheric targets is closely related to its working wavelength. Considering the scattering and absorption of radio waves by cloud and rain particles, various bands have only a certain scope of application.

K-band radar is often used to detect clouds that do not produce precipitation, while X-band radar, C-band radar and S-band radar are used to detect precipitation. Among them, S-band radar is most suitable for detecting rainstorm and hail, and ultra-high frequency and ultra-high frequency radar with high sensitivity can detect the clear sky flow field in troposphere-stratosphere-middle layer.

Baidu Encyclopedia-Weather Radar