准实时性前斜视INS/SAR组合导航滤波算法研究

为消除常规利用正侧视SAR图像辅助导航信息对惯性误差进行修正时的滞后影响，结合前斜视SAR成像工作特性，本文分析提出了新的准实时性组合导航滤波方案和算法，以解决SAR/INS组合导航系统中的量测滞后影响；本文分析了前斜视SAR成像辅助导航系统工作特点，分析了SAR量测输出模型；建立了准实时性前斜视INS/SAR组合导航滤波算法模型，并通过仿真分析了组合导航系统性能。仿真结果表明：采用所提出的惯性/SAR组合方案和算法，可以有效克服成规正侧视SAR辅助匹配输出滞后的影响，有效满足组合系统性能要求。

Research of Quasi Real-time Squint INS/SAR Integrated Navigation Filtering Algorithm

To eliminate the conventional air-borne SAR images using auxiliary information on the inertial navigation error correction lagged effect ,This paper proposed a new analysis of the quasi-real-time navigation filter programs and algorithms to solve the SAR/INS integrated navigation system the lagged effect of the measurement combined with previous squint SAR imaging features; This paper analyzes the squint SAR imaging-aided navigation system work characteristics, analysis of SAR measurement output model; established a quasi-real-time INS/SAR integrated navigation filter algorithm model, and then analysis of the integrated navigation system performance by simulation. Simulation results show that: the proposed INS / SAR combination of programs and algorithms can effectively overcome the lagging impact of the conventions SAR auxiliary navigation systems, and meet performance requirements.