基于电离层模型虚高修正的短波时差定位OA

To address the current status and development requirements of shortwave detection and positioning,this study conducts research on High Frequency Time Difference of Arrival(HF-TDOA)positioning based on ionospheric model virtual height correction.This paper first establishes an HF ionospheric propagation TDOA positioning model using numerical three-dimensional ray tracing,then derives the specific application mechanism of the ionospheric model virtual height correction in the HF-TDOA positioning algorithm,and finally validates the proposed algorithm using measured TDOA positioning data and compares it with the traditional HF-TDOA positioning algorithm based on joint estimation of virtual height and position.Real data processing results show that the HF-TDOA positioning algorithm based on ionospheric model virtual height correction exhibits more stable positioning performance.The circular error probable values in the morning,noon,afternoon,and evening periods are 12.28 km,13.13km,12.82 km and 13.29 km,respectively;compared with the HF-TDOA positioning algorithm based on joint estimation of virtual height and position,the positing error in the four periods are reduced by 36%,63%,65%and 61%,respectively.