NEHRP Clearinghouse
- Title
- An Engineering Feasibility Study of an Ionospheric Technique to Improve Tsunami Warning Systems.
- File
- PB298987.pdf
- Author(s)
- Najita, K.
- Source
- National Science Foundation, Washington, DC. Engineering and Applied Science., September 30, 1976, 210 p.
- Abstract
- This is the second report to the National Science Foundation on a research program designed to establish the feasibility of a tsunami warning system based on data obtained using an HF Doppler technique which measures changes in the upper atmosphere caused by fast Rayleigh waves from a tsunamigenic earthquake. This report describes the studies carried out to better interpret the ionospheric Doppler recording. The study covers the acoustic waves from the launch point to ionospheric heights through the atmosphere. It reports on the different aspects of determining the accuracy to which one could determine the propagation path and the travel time for these long period acoustic waves. It describes the work carried out thus far on the determination of the initial phases of the Rayleigh waves and points out the extreme accuracy required of the recording and analysis of the data.
- Keywords
- Doppler effect; Ray tracing; Fortran 4 programming language; Ionosphere; Rayleigh waves; Elastic waves; Tsunamis; Computer programs; Warning systems; Fortran; Infrasonic radiation; Earthquakes; Ionospheric disturbance