Whistler-mode signals - Group delay by crosscorrelation

Details Whistler-mode signals - Group delay by crosscorrelation Whistler-mode signals - Group delay by crosscorrelation

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..451t&link_type=abstract

Geophysical Research Letters, vol. 2, Oct. 1975, p. 451, 452.

Other

1

Correlation Detection, Group Velocity, Radio Transmission, Signal Measurement, Whistlers, Cross Correlation, Frequency Shift Keying, Minicomputers, Vlf Emission Recorders

Scientific paper

Group travel times of 18.6 kHz whistler-mode signals from NLK, Seattle, to Wellington, New Zealand, are now being measured using the normal FSK transmissions. This is done using a minicomputer programmed to perform real-time cross correlations between two receivers: one receiver gets its signal from a whip aerial on which the ground wave (subionospheric mode) dominates, while the other gets its signal from a loop oriented for minimum ground wave. Group travel time can thus be measured continuously while there are whistler-mode signals present. Delays of 0.2 to 0.8 seconds have been found.

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