Research On The Possibility Of Geostationary Orbit Space-borne Precipitation Radar

One of the main applications of radar is the measurement of precipitation, themeasurement of precipitation has experienced the change from the ground to thesky then to the space, the success of the TRMM-PR marks the beginning of thedevelopment of the spaceborne precipitation radar, the geostationary orbitprecipitation radar can perform more excellent than TRMM-PR, it can measuredirectly from the high orbit the rainfall’s vertical3D-structure without thelimitation of the time or the place so as to achieve the real time monitoring of theregion of interest, it is also the trend of future precipitation radar. This articlefinish a preliminary verification about if spaceborne precipitation radar plan isfeasible from the theory, the main consideration is that if the system can achievethe indicators on the resolution requirements when it meets the other requirementsand the actual situation constraints and if the echo power can meet the detectionthreshold. From these two points, based on the analysis of meteorological target’sRCS the article calculates the rain echo power; then to meet the requirement ofhigh two-dimensional resolution,it completes the antenna arrangement to meet therequirement of hig horizontal resolution, and then it designs reasonable signalparameters, it also give a briefly analysis of the clutter suppression, it completesthe analysis of pulse compression techniques and finds the effective method for therange sidelobe suppression to meet the requirements of vertical resolution, itfocuses on the analysis of sidelobe suppression methods, introduces a neweffective method for sidelobe suppression. Finally,it completes a nonlinearcoordinate transformation on the results, which makes the calculation process andsystem requirements compatible.