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Someone found it when they went out at night
The night sky at multiple locations in the urban area of Nanjing
A green laser appeared
It sparked speculation
Illuminated night view? Altman? Where does the mysterious green light come from
The picture taken near the Daguang Road can be seen that the green laser shoots straight forward in the night sky, the range is still very long, the laser seems to come from the roof of the Hongying Building, but in the daytime, it is mysteriously missing. Some people think that the green light is quite poetic, it may be the lighting project of the city's night scene, some people suspect it is a prank, and even joke that it may be ultraman who watched it as a child.
The zero-distance reporter came to the Hongying Building to understand the situation, and followed the property staff to the top floor of the building, and found that the green laser was emitted by a device that resembled a monitoring probe.
Property manager Qian Jun said that this is the environmental monitoring equipment installed by the Nanjing Municipal Environmental Protection Bureau a month ago, and when it was just opened, there were many jokes, and many people complained to the relevant management departments, resulting in urban management and public security successively coming to the door.
What is the use of mysterious green light?
The environmental protection department said that the lidar is covered in many areas of Nanjing, and there are currently eight units, and the one in the Hongying Building will be withdrawn in six months, and there are corresponding considerations when choosing the site.
Operations companies say that radar does not only emit lasers at night, but detects environmental data 24 hours a day. The device interacts with the aerosol in the air through the laser to produce a backward curve, which is then received by the telescope, and the concentration of aerosols in the air and the situation of atmospheric pollutants are calculated by the conversion system and algorithm.
Popular science time:
An aerosol is a gaseous dispersion system consisting of solid or liquid particles suspended in a gaseous medium. Clouds, fog, dust in the sky, and smoke from industry and transportation are concrete examples of aerosols.
According to reports, the equipment can continuously monitor the pollution situation within a radius of 5-10 kilometers. Compared with the past, through the device, you can not only see where the pollution is, but also trace the source.
Source: Nanjing Zero Distance