In this paper, the author mainly studied multi-sensors target tracking in non-linearity system. In reality system, EKF data fusion arithmetic is used to be used, but the tracking precision of this fusion arithmetic is not enough. In this paper, the author put forward an new filter arithmetic that is distributing conversion measurement Kalman filter tracking arithmetic. After that, the author had an study on the relation between interferometers' location and tracking precision when multi-interferometers were used. After the theory analysis and computer simulation, we have an good method that can improve not only the tracking precision but economize the laser sensor resource in two dimension space.
