NDLI: Spectral characteristics of the return

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Spectral characteristics of the return

Content Provider	NASA Technical Reports Server (NTRS)
Author	Rottger, J.
Copyright Year	1983
Description	Doppler spectra of VHF radar returns typically indicate a Gaussian back-ground shape with superimposed spikes. An average of 10 Doppler spectra are shown which are calculated from a time series of seven min of complex data. A proper Gaussian fit to the background distribution is possible by neglecting the strong amplitude spikes. If this background distribution is due to beam width broadening, either diffuse reflection or rather isotropic scattering is required. If beam width broadening is neglected, the width of the distribution is given by turbulent velocity fluctuations. The reflected component is about 1/3 of the scattered component. It is assumed that the amplitude spikes due to diffuse reflection indicate a Gaussian frequency distribution such as for the amplitudes due to scattering.
File Size	148388
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840019027
Archival Resource Key	ark:/13960/t4pk57303
Language	English
Publisher Date	1983-12-01
Access Restriction	Open
Subject Keyword	Communications And Radar Normal Density Functions Spike Potentials Mesosphere Doppler Effect Radar Transmission Radar Beams Atmospheric Turbulence Electromagnetic Scattering Spectrum Analysis Bandwidth Radar Signatures Radar Echoes Velocity Measurement 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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