Implementation plan of small satellite constellation for environmental and disaster monitoring and prediction

The construction plan of small satellite constellation for environmental and disaster monitoring and forecasting adopts the strategy of step-by-step implementation. The first step is to launch two optical satellites and one synthetic aperture radar satellite (that is, the "2+ 1" scheme), initially forming China's disaster and environmental monitoring capabilities. The second step is to realize the "4+4" constellation scheme consisting of four optical satellites and four synthetic aperture radar satellites, and form the combat capability of using space technology to support disaster and environmental monitoring and forecasting.