System parameter design for multi-mode small satellite SAR in scanning mode and transmitting power optimization method

The invention discloses a system parameter design method for a multi-mode small satellite SAR in a scanning mode and a transmitting power optimization method. The system parameter design method is used for providing system working parameters such as the antenna size, signal bandwidth, pulse repetition frequency, scanning wave digit, wave position and the like for system simulation in the scanningmode. According to the transmitting power optimization method, the transmitting power is reduced by fully utilizing the characteristics of high wind speed and strong sea surface microwave scattering under the condition of proper wind direction, so that the starting time of each orbit when the multi-mode small satellite SAR works in an SAR mode is prolonged. A system parameter design result under the scanning mode, an ocean scene simulation result under conventional power and an ocean scene simulation result after power optimization are given. Results show that when the designed system parameters are adopted for system