An estimate model of line of sight(LOS) angular velocity aimed at radome error slope was presented.Based on the optimal filtering theory of structure stochastic jump system

a new algorithm for estimating LOS and correcting the radome error was proposed.At the same time

other two simple algorithms were deduced.The results of simulations show that when radome error slope stochastically changes in a wide range

all above three algorithms can correct the radome error

precisely estimate LOS angular velocity and reduce the missing distance obviously.But three algorithms are with different complexity and precision.According to different requirements of computing time and memory size in the application

the appropriate algorithm is selected to meet all the conditions in the project.