Analysis and Application of Geometric Dilution of Precision Based on Altitude-Assisted INS/SAR Integrated Navigation
作者： Jiazhen Lu , Lili Ye , Songlai Han
关键词:
摘要: The inertial navigation system/synthetic aperture radar (INS/SAR) integrated system can provide all-weather information both day and night. Altitude is often used as independent to assist the in reducing vertical channel errors. In this study, GPS geometric dilution of precision (GDOP) analysis method introduced into INS/SAR navigation. By comparing effects presence or absence altitude assistance different distributions SAR measurement ground points on observability accuracy, results based GDOP are provided. simulation show that an altitude-assisted with two sides achieves best observability. addition, there a positive correlation between elevation angle. flight experiment verify effectiveness proposed consistent results.
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