What can remote sensing technology do?

Remote sensing technology has been widely used in meteorological observation, earth resources investigation, environmental pollution monitoring, earthquake monitoring, ocean monitoring, land use planning, vegetation classification, crop yield investigation and crop diseases and insect pests monitoring.

At present, the main research direction of remote sensing technology is to improve the resolution of remote sensor and the ability of comprehensive utilization of information, develop advanced remote sensor and information transmission and processing equipment, realize all-weather work of remote sensing system and real-time acquisition of information, and gradually expand from ultraviolet spectrum to X-ray and γ-ray, and from single electromagnetic wave to comprehensive application of acoustic wave, gravitational wave and seismic wave.

Remote sensor is an instrument that remotely senses radiation or reflects electromagnetic waves from the ground environment. Now there are more than 20 kinds of common cameras, besides visible light cameras, infrared cameras and ultraviolet cameras, there are also infrared scanners, multispectral scanners, microwave radiation and scatterers, side-looking radars, thematic imagers and imaging spectrometers.

Basic principles of remote sensing technology;

Any object has spectral characteristics, specifically, they all have different absorption, reflection and radiation spectral characteristics. In the same spectral region, various objects reflect different situations, and the same object also reflects different spectra. Even the same object will have different reflection and absorption spectra at different times and places due to different angles of sunlight.

Remote sensing technology is based on these principles to judge objects. Remote sensing technology usually uses three spectral bands of green light, red light and infrared light for detection. The green part is generally used to detect the characteristics of groundwater, rocks and soil; The red light part detects plant growth, change and water pollution; Infrared detection of land, minerals and resources.