Satellite remote sensing of ocean water color is a technology of observing ocean water color by satellite, which mainly obtains ocean water color information by measuring the reflection and absorption of different wave bands of light by seawater. This technology is widely used in marine environmental monitoring, marine ecosystem research, fishery management and other fields.
Visible light sensor plays a key role in ocean color satellite remote sensing. The visible light sensor mainly works in the visible light band, and it can capture the signals reflected and scattered by sunlight on the water surface, thus obtaining the information of the ocean surface. Because the light in visible light band is less affected by water vapor when it propagates in water, the visible light sensor can overcome the influence of water vapor and realize 24-hour monitoring.
Specifically, when the sun shines on the ocean surface, part of the light will be reflected by seawater, and part of the light will penetrate seawater and be reflected or scattered by underwater objects. These rays will eventually pass through the water again, and some of them will be reflected back into the air by seawater again, which is called reflected light. The visible light sensor captures this reflected light to obtain the information of the ocean surface.
Because the light in visible light band is less affected by moisture in the propagation process, even at night or in bad weather (such as foggy days and rainy days). ), visible light sensors can still obtain reliable information of ocean surface. This enables ocean color satellite remote sensing to realize 24-hour uninterrupted monitoring.
Application of satellite remote sensing;
1. Agricultural field: Satellite remote sensing can be used to monitor crop growth, predict yield and monitor land use change. Through the analysis and processing of satellite data, it can provide accurate agricultural management decision support, improve agricultural production efficiency and reduce costs.
2. Forestry: Satellite remote sensing can be used to monitor forest cover, evaluate forest quality and change, and monitor the distribution of wildlife. This is of great significance to forest protection, resource development and ecological construction.
3. Environmental monitoring field: Satellite remote sensing can be used to monitor environmental problems such as air pollution, water pollution and soil pollution, and can also be used for environmental quality evaluation and environmental change prediction. This provides important data support for environmental protection and management.
4. Urban planning: Satellite remote sensing can be used in urban spatial planning, urban traffic planning, urban ecological planning, etc. Through the remote sensing monitoring and analysis of urban space, we can better understand the spatial layout and development trend of the city and provide scientific basis for urban planning.
5. Disaster prevention and mitigation: Satellite remote sensing can be used for disaster early warning, disaster assessment and disaster rescue. Through remote sensing monitoring and analysis of disaster areas, we can find hidden dangers in time, evaluate disaster losses and make rescue plans. And provide important data support for disaster prevention and mitigation.