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Is vhf fresnel reflectivity due to low frequency buoyancy waves?
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Vanzandt, T. E. Vincent, R. A. |
| Copyright Year | 1983 |
| Description | VHF radar echoes are greatly enhanced near the zenith relative to other directions. This enhancement must be due to reflection from horizontally stratified laminate of refractive index. The refractivity laminate are due to the displacements of low frequency buoyancy (internal gravity) waves acting on the background vertical gradient of refractivity. VANZANDT (1982) has shown that the observed spectra of mesoscale wind fluctuations in the troposphere and lower stratosphere are modeled by a universal spectrum of buoyancy (internal gravity) waves. Since the observed frequency spectrum is red, the buoyancy wave model of the vertical displacement spectrum is strongly enhanced near the zenith. In other terms, the resulting refractivity irregularities are strongly stratified. |
| File Size | 205034 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840019021 |
| Archival Resource Key | ark:/13960/t6b32pz24 |
| Language | English |
| Publisher Date | 1983-12-01 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Viscosity Atmospheric Models Spectrum Analysis Refractivity Troposphere Very High Frequencies Mesoscale Phenomena Radar Echoes Fresnel Diffraction Internal Waves Gravity Waves Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
