航空兵器
航空兵器
항공병기
HANGKONG BINGQI
2015年
2期
31-33,54
,共4页
机载 GPS 定位%电离层浮点模型%移动基线%模糊度
機載 GPS 定位%電離層浮點模型%移動基線%模糊度
궤재 GPS 정위%전리층부점모형%이동기선%모호도
airborne GPS positioning%ionosphere-floating point model%mobile baseline%ambiguity
周跳检测、准确消除电离层和对流层残差影响、快速固定新星和失锁卫星的模糊度等，都是机载 GPS 载波相位差分定位中定位精度能否达到分米级的关键因素。文中利用电离层残差法和 M －W 组合探测周跳，使用电离层浮点模型和对流层经验模型改正电离层和对流层残差，并用扩展 Kalman 滤波求解 GPS 双差方程，采用 LAMBDA 算法求解模糊度。算例结果表明，该方法能有效探测动态数据周跳，消除电离层和对流层残差影响，恢复失锁卫星和新星模糊度，使得定位达到分米级，并利用飞机上2台 GPS 接收机的移动基线解算结果验证了该定位精度。
週跳檢測、準確消除電離層和對流層殘差影響、快速固定新星和失鎖衛星的模糊度等，都是機載 GPS 載波相位差分定位中定位精度能否達到分米級的關鍵因素。文中利用電離層殘差法和 M －W 組閤探測週跳，使用電離層浮點模型和對流層經驗模型改正電離層和對流層殘差，併用擴展 Kalman 濾波求解 GPS 雙差方程，採用 LAMBDA 算法求解模糊度。算例結果錶明，該方法能有效探測動態數據週跳，消除電離層和對流層殘差影響，恢複失鎖衛星和新星模糊度，使得定位達到分米級，併利用飛機上2檯 GPS 接收機的移動基線解算結果驗證瞭該定位精度。
주도검측、준학소제전리층화대류층잔차영향、쾌속고정신성화실쇄위성적모호도등，도시궤재 GPS 재파상위차분정위중정위정도능부체도분미급적관건인소。문중이용전리층잔차법화 M －W 조합탐측주도，사용전리층부점모형화대류층경험모형개정전리층화대류층잔차，병용확전 Kalman 려파구해 GPS 쌍차방정，채용 LAMBDA 산법구해모호도。산례결과표명，해방법능유효탐측동태수거주도，소제전리층화대류층잔차영향，회복실쇄위성화신성모호도，사득정위체도분미급，병이용비궤상2태 GPS 접수궤적이동기선해산결과험증료해정위정도。
The cycle slip detection, the accuracy for eliminating the residual errors influence of ionosphere and troposphere delay, and the fast ambiguity recovery of the unlock satellite and new satellite are key factor that airborne GPS dual frequency carrier phase positioning decimeter positioning accuracy can be achieved.In this study, the cycle slips can be detected by using ionosphere residual method and M-W combination.The iono-sphere-floating point model and troposphere empirical model are used to correct the ionosphere and troposphere re-sidual error.The GPS dual frequency observables equation is solved by the extend Kalman filter and the ambiguity is solved by the LAMBDA method.The experiment results show, this method could detect the dynamic data of cy-cle slips effectively, remove the residual of the ionosphere and troposphere delay, and recover the ambiguity of the unlock satellite and new satellite.So the precision of the positioning reaches decimeter level and is verified by the calculation of moving baseline of two GPS receivers on the plane.
