What is remote sensing?

(1): Remote sensing, that is, remote sensing. English name "Remote Sensing".

Remote sensing in a broad sense refers to all non-contact long-distance detection.

Narrow sense of remote sensing: a comprehensive technology to detect the battery wave reflection or transmit information from different working platforms in the air and on the ground (such as towers, balloons, airplanes, rockets, artificial earth satellites, spaceships, space shuttles, etc.). ), and then through transmission, processing, interpretation and analysis, to detect and detect the resources and environment of the earth.

(2): The application is probably in five aspects.

1. Remote sensing of resources: For example, in mineral resources, remote sensing analysis is used for prospecting, and in land resources, there are land cover, land use, land resource evaluation and land dynamic detection.

2. Urban remote sensing: such as urban expansion, urban ecological environment, urban population estimation and urban planning can all be realized by remote sensing technology;

3. Environmental remote sensing: such as the detection of ozone layer, aerosol and atmospheric thermal pollution in the atmospheric environment; Water pollution, marine oil pollution detection, etc. Vegetation detection, desertification detection and soil erosion detection in natural ecological environment;

4. Disaster remote sensing: such as flood remote sensing, fire remote sensing and geological disaster remote sensing;

5. Agricultural remote sensing: such as spectral characteristics of plants, crop yield estimation, agricultural pest detection, etc.

At present, China has done a lot of remote sensing work on land, but the remote sensing technology on the ocean is still relatively lacking.