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- W1663934879 abstract "Wavelike disturbances were observed in the ionosphere following several nuclear explosions in early 1960's. Supersonic shock waves within the atmosphere generated by large rockets can cause ionospheric electron density perturbations. A CW phase path Doppler array in the New York area was operated during the Saturn-Apollo 12 and 13 launches and recorded Doppler frequency fluctuations due to rocket launchings. Cross correlation and power spectral analyses of the phase path-path Doppler frequency variation records showed that the phase velocities of the signal arrivals were from south of the array with 700 - 800 m/sec corresponding to periods in the range of 2 to 4 minutes. Ionograms taken every 60 seconds from Wallops Islands showed clearly ionospheric disturbances due to rockets. The group velocities were estimated to be of the order of 450 m/sec 1 obtained from the earliest visible disturbances seen on CW phase path Doppler records and ionograms together with the rocket trajectory data." @default.
- W1663934879 created "2016-06-24" @default.
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- W1663934879 date "1972-10-01" @default.
- W1663934879 modified "2023-09-27" @default.
- W1663934879 title "Ionospheric disturbances caused by long period sound waves generated by Saturn-Apollo launches" @default.
- W1663934879 hasPublicationYear "1972" @default.
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