This paper investigates the problem on simultaneously estimating the velocity and position of the target for range-based multi-USV positioning systems. According to the range measurement and kinematics model of the target. we formulate this problem in a mixed linear/nonlinear discrete-time system. In this system. https://www.ngetikin.com/super-value-1-2-in-Tobacco-Road-Acacia-Distressed-Engineered-Hardwood-Flooring-4-8-in-Wide-Sample-quick-super/