RS is the abbreviation of remote sensing. Remote sensing refers to non-contact and long-distance detection technology. Generally, it refers to the detection of electromagnetic radiation and reflection characteristics of objects by sensors/remote sensors. Remote sensing is to detect the target object by remote sensors and other instruments sensitive to electromagnetic waves under the condition of being far away from the target and not touching the target object.

It is a science and technology to obtain reflected, radiated or scattered electromagnetic wave information (such as electric field, magnetic field, electromagnetic wave, seismic wave, etc.). ) and extraction, judgment, processing, analysis and application. Remote sensing is a comprehensive earth observation technology, and its realization requires not only a set of technical equipment, but also the participation and cooperation of many disciplines, so the implementation of remote sensing is a complex system engineering.

Characteristics of remote sensing technology

Remote sensing detection can dynamically reflect the changes of things on the ground, and can periodically and repeatedly observe the same area, which is helpful for people to discover and dynamically track the changes of many things on the earth through the obtained remote sensing data. Study the changing laws of nature. Especially in monitoring weather conditions, natural disasters, environmental pollution and even military targets, the application of remote sensing is particularly important.

The data obtained are comprehensive. At the same time, remote sensing data covering a large area are obtained. These data comprehensively show many natural and human phenomena on the earth, macroscopically reflect the shape and distribution of various things on the earth, and truly reflect the characteristics of geology, geomorphology, soil, vegetation, hydrology, artificial structures and so on.

Refer to the above content: Baidu Encyclopedia-Remote Sensing