NDLI: Properties of echo spectra observed by mst radars

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Properties of echo spectra observed by mst radars

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wakasugi, K.
Copyright Year	1983
Description	Turbulent scatter and Fresnel reflection are the fundamental echoing mechanisms to interpret the signals observed by Mesosphere-stratosphere-troposphere (MST) radars. Turbulent scattered echoes provide information about the turbulence structure and mean flow of the atmosphere. Observational results with VHF MST radars, however, show the importance of Fresnel reflection due to the infinite gradient of reflectivity at the edges of a scattering layer. This condition is excluded for the weak fluctuation models but it is still possible to include the observed aspect sensitivity by assuming an anisotropic structure of fluctuations. Another explanation of the aspect sensitivity observed by MST radars is advanced. Spectral estimates by the widely used periodogram were related to a four-dimensional spectrum of atmospheric fluctuations with anisotropic structure. Effects of the radar system such as antenna beam width, beam direction and Fast Fourier Transformations (FFT) data length were discussed for the anisotropic turbulent atmosphere. Echo parameters were also estimated.
File Size	177385
Page Count	3
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840019103
Archival Resource Key	ark:/13960/t5t777k06
Language	English
Publisher Date	1983-12-01
Access Restriction	Open
Subject Keyword	Communications And Radar Atmospheric Circulation Electric Pulses Spectra Doppler Effect Fast Fourier Transformations Atmospheric Scattering Atmospheric Turbulence Anisotropy Radar Bandwidth Radar Scattering Very High Frequencies Signal Processing Radar Echoes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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