Research on characteristics of ionospheric echo based on ocean

摘要

To verify the feasibility of the typhoon detection with the ocean echo data obtained by the shore-based High-Frequance Surface Wave Radar(HFSWR). The data was measured on the Bech Long Vi island of in September 2013. Calculate correlation coefficients of every part data to extract the ionospheric echo data, which infers reason out ionospheric echo variation characteristic. And it calculates the ionospheric echo SNR and analysis its SNR variation characteristics under the influence of typhoon. Ionospheric echo presents daily periodic changes in range-Doppler spectrum; Ionospheric echo SNR under the influence of typhoon decreased by about 5% to 10 %without the influence. It is feasible to detect typhoon with the ionospheric echo variation characteristic extracted from radar echo data.