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- W1999677654 abstract "Simultaneous bearing observations are made on colooated HF transmitters radiating on different frequencies and, out of many days' measurement, the results for one day are presented. The bearing data clearly show the presence of bearing fluctuations with periodicities ranging from about 12 to 20 minutes. Those with the longer periodicities show a good correlation with one another at relatively wide separations (about 4.5 MHz) of the radiated frequencies; furthermore, they exhibit a phase advancement with height which would be expected from theory if the bearing perturbations arose from gravity waves. However, the fluctuations with periodicities of the order of 12 minutes are only well correlated when the radiated frequencies differ by less than about 2 MHz and it is suggested that they are, physically, very much smaller disturbances." @default.
- W1999677654 created "2016-06-24" @default.
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- W1999677654 date "1975-03-01" @default.
- W1999677654 modified "2023-09-26" @default.
- W1999677654 title "The effect of frequency separation on the correlation of bearing errors measured on ionospherically propagated HF signals from colocated transmitters" @default.
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- W1999677654 doi "https://doi.org/10.1016/0021-9169(75)90180-4" @default.
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