A Novel Single Satellite Passive Location Method Based on One-Dimensional Cosine Angle and Doppler Rate of Changing

For the characteristics of microsatellites such as small size, light weight, and limited equipment resources, a novel single-satellite passive location method that combines one-dimensional (ID) cosine angle and Doppler rate of changing is proposed. Compared with the conventional single satellite method using two-dimensional interferometers, the proposed method can reduce the system cost. Aiming at dealing with the high degree of non-linearity between measurement equations and the emitter position, an orthogonal cosine angle parameterization based multi-hypothesis nonlinear least square (OCAP-MHNLS) algorithm is proposed here. The performance influenced by angle between the direction of receiving antenna linear array and the satellite movement heading is analyzed by the geometric dilution of precision (GDOP). Computer simulations show that the location algorithm proposed in this paper can reach Cramer-Rao lower bound (CRLB) under the condition of typical measurement errors.