全球定位系统2025，Vol.50Issue(2)：54-60,7.DOI:10.12265/j.gnss.2025010
北斗三号的SAR成像分辨性能分析
Analysis of SAR imaging resolution performance of BDS-3
摘要
Abstract
The bistatic synthetic aperture radar system with the global satellite navigation system(GNSS-SAR)as the transmitter possesses advantages such as all-weather operation and strong sustainable monitoring capabilities.Regarding the BeiDou Navigation Satellite System(BDS),previous studies mainly concentrated on the traditional B1I and B3I signals.With the full operation of the BeiDou-3 Navigation Satellite System(BDS-3),the newly added signals such as B1C,B2a,and B2b have a larger bandwidth,presenting new opportunities for the GNSS-SAR system.This paper analyzes the imaging resolution performance of BDS-3 signals under different geometric configurations,employs the generalized ambiguity function(GAF)to analyze the imaging performance of BDS-3 signals,and verifies it through simulation.The research results indicate that the geometric configuration has a considerable influence on the resolution performance of the GNSS-SAR system.The minimum resolution distance of different navigation signals of BDS-3 is approximately 18 m,the maximum resolution distance of B2a and B3I is about 30 m,and the maximum resolution performance difference between B1C and B1I is significant,being 20 m and 50 m respectively.关键词
合成孔径雷达(SAR)/导航卫星/北斗三号导航卫星系统(BDS-3)/广义模糊函数(GAF)/分辨性能Key words
synthetic aperture radar(SAR)/navigation satellite/BDS-3/generalized ambiguity function(GAF)/resolution performance分类
测绘与仪器引用本文复制引用
王叙乔,杜兰,刘泽军,张中凯,周佩元..北斗三号的SAR成像分辨性能分析[J].全球定位系统,2025,50(2):54-60,7.基金项目
国家自然科学基金(42304044,42204041) （42304044,42204041）
