Frequency Correlation of HF Skywave Ground Backscatter Doppler Spectra

摘要

The frequency correlation of Doppler spectra from ionospherically propagated ground backscatter measured on 17 October 1980 is presented. As with direct sea-echo backscatter spectra, there is no significant frequency correlation other than that caused by the window (weighting function) used for the spectral analysis. This result supports a previous assumption used to analyze skywave sea-echo backscatter that ionospheric reflection does not introduce frequency correlation.