What is remote sensing?

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Remote sensing, English name is Remote Sensing, abbreviated as RS, and remote sensing technology can be called RS technology. Remote sensing refers to all non-contact long-distance detection technologies.

Broad sense: that is, remote sensing refers to all non-contact remote detection. Such as satellites, cameras, human eyes, etc.

Narrow definition: refers to the technology of using detection instruments (such as satellites and cameras). ) without direct contact with the target, so as to record the electromagnetic wave characteristics of the target, and through the analysis, processing and interpretation of the characteristics and changing laws of the ground objects. It can be simply understood as the process that the camera shoots an object, then processes and analyzes the film, and then presents the photo to the human eye.

Remote sensing science is an interdisciplinary subject, which combines geography, surveying, physics and computer science.

Remote sensing technology can quickly obtain information, save time and effort, and can quickly carry out large-scale monitoring.

At present, remote sensing technology has been continuously recognized and developed, and all countries have launched satellites (called satellite remote sensing) to detect the earth, the moon and Mars. Nowadays, remote sensing technology has been widely used in agriculture, meteorology, hydrology, military, ocean and other fields.

Weather forecast-meteorological satellite

It can predict precipitation, temperature, typhoon, fire, sandstorm and so on.

Agricultural remote sensing

Remote sensing is used to monitor crop planting area and crop growth, and to estimate crop yield on a global, national and regional scale.

Remote sensing of water body

Monitoring water quality, ocean remote sensing, monitoring fish, etc.

Other applications include: satellite navigation (such as car navigation) and exploration of unknown areas (such as the moon and Mars). ), urban and rural planning. Remote sensing has been applied to all aspects of this country.