In this paper

STAP(space time adaptive processing) for an airborne fire-control radar to detect slowly moving ground targets is discussed.The system of this kind is characterized by its forward looking antenna

short wavelength

high flight velocity and low PRF

which results in the highly ambiguous Doppler frequency of ground clutter and large Doppler bandwidth of mainbeam clutter.Conventional processing can not give good performance of detection.This paper is focused on the features of detection of slowly moving ground targets by use of the airborne fire-control radar

and the cascade processing and joint processing are compared.Finally

simulation results are included to validate the conclusions.