AN EXPERIMENTAL TEST OF THE ACOUSTIC-GRAVITY WAVE INTERPRETATION OF TRAVELLING IONOSPHERIC DISTURBANCES
Interim rept. 1 Apr 1967-31 Mar 1968
RAYTHEON CO BURLINGTON MA SPENCER LAB
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The report presents the results of simultaneous HF Doppler and UHF incoherent backscatter measurements of the travelling ionospheric disturbances observed at Arecibo P.R. during the summer of 1967. One of the prime objectives in conducting this series of experiments involving 3 spaced phase path sounders and the backscatter radar is to examine the gravity wave interpretation of the large scale travelling disturbances. The analysis of the observations is based upon three distinct techniques 1 Cross-correlation analysis of the HF Doppler records for an accurate estimate of the wave velocity, 2 HF ray tracing for demonstrating the self-consistency of the HF and the incoherent backscatter data, and 3 the coupling of acoustic gravity waves to the ionospheric plasma. It is concluded from the results of the analysis that the large scale travelling ionospheric disturbances are truly a manifestation of the acoustic-gravity waves. Finally, some aspects of the analysis which will be refined in the next phase of the study are also outlined.
- Atmospheric Physics