In order to improve a relatively high spatial resolution for spaceborne scatterometer and satisfy the observation requirements of geophysical parameters(such as,snow water equivalent,snow/ice freezing and thawing),the analysis and research is carried on based on the scanning spaceborne microwave radar. Based on the pulse compression processing and Doppler technology,a scanning resolution improvement method is established.For the characteristic that the azimuth is changing with the rotating antenna,a model of different azimuth angles is established.The results show that the azimuth resolution is related to radar Doppler information,and using this relationship can improve the azimuth resolution.The spatial resolution can reach 2 km at side-looking and 2~5 km at inclined front and rear.In view of the snow water equivalent observations,the system Kpc can reach 0.3 when the spatial resolution is 5 km,and can reach 0.3~0.5 when the spatial resolution is 2 km.
