How do you view the satellite images of the Central Meteorological Observatory?

The satellite image is green. The deeper the green, the stronger the ground radiation and the better the weather. When the sky is covered with clouds and rain, the satellite observes the infrared radiation from the cloud top into space, which is white or grayish white.

White indicates that the ground radiation is very weak, the temperature is very low, the cloud system is very thick and dense, and the rainfall intensity is also very high. The transition zone between clear sky area and cloudy and rainy area is usually covered by dark gray, gray and light gray clouds, indicating that there are clouds with different thicknesses and no obvious precipitation. On satellite images displayed on TV, the surface and ocean are usually represented by green and blue.

The visible light cloud pictures taken by meteorological satellites from space are taken by using the scattered light generated by the coarse-grained scattering of sunlight by cloud droplets and ice crystals. White on the cloud image indicates strong sunlight reflection, and gray and black places indicate weak reflection.

Because the reflection ability of the land is higher than that of the ocean, the land on the visible light cloud map is gray, the ocean is black, and the area covered by ice, snow and deep clouds is generally white.

Extended data According to the different instruments and equipment on the satellite, satellite cloud pictures can be divided into two categories: one is the cloud picture taken by the TV camera on the satellite, that is, the TV cloud picture; The other is the cloud image obtained by radiometer scanning and detecting the earth's atmosphere. On the TV cloud image, the black and white degree of the image indicates the reflectivity of the surface and various clouds to solar radiation, white indicates the strongest reflectivity, and black indicates the weakest reflectivity.

There are two kinds of satellite images detected by scanning radiometer:

(1) When using radiometer to measure the reflected radiation intensity of clouds and different land surfaces to a certain wavelength band (such as 0.52 ~ 0.73 micron), cloud images similar to TV cloud images can be obtained due to the different reflection abilities of different clouds and different land surfaces. This kind of cloud image and TV cloud image are collectively called visible light cloud image.

② Using radiometer to measure infrared radiation emitted by cloud top or ground in atmospheric window band (8.5 ~ 1 1 micron). This observation value can be converted into the radiation temperature of cloud top or surface, and the temperature can be expressed in black and white, thus obtaining the distribution images of clouds and surface with different properties. This kind of image is called infrared cloud image.

Baidu Encyclopedia-Satellite Cloud Map