This paper introduces a new Spaceborne Polarimetric SAR Data Simulation system

The siumlation method used in this paper is based on the view of real system; and according to the sequence of the transmit pulses

each return wave formed by the reflection of all the targets which are irradiated by the transmit beam is calculated one bye one

all these return wave data form the result. Compared with the usually used method based on single point target simulation

this method is much more efficient especially in case of simulating a large area. It is also conveniently to simulate all kinds of error and keep the correlation and consistency of the errors. At last

a simulation example is also given.