Accession Number : AD0781043

Title :   Pulse Sounding with Closely Spaced Receivers as a Tool for Measuring Atmospheric Motions and Fine Structure in the Ionosphere. VI. Spectral Analysis of Interlaced Sets of Data.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Pfister,W.

Report Date : 07 MAR 1974

Pagination or Media Count : 22

Abstract : A pulse sounding system, like LTIRF's complex amplitude multifrequency scanner (CAMS), can be used to sample the returned echo on many parameters (antennas, frequencies, range gates). If the number of parameters is reduced, the sampling rate can be increased and used in a spectrum analysis either to improve the signal-to-noise ratio or to extend the Doppler range. The fact that for this application the data are not equally spaced, but consist of two, three or more interlaced sets of equally spaced data, requires a special treatment. The problem is formulated with three sets, according to the format of CAMS. Examples of spectral measurements are included. The case for two or four interlaced sets is discussed in Appendixes A and B. (Author)

Descriptors :   *Atmospheric sounding, *Ionosphere, Atmospheric motion, Doppler effect, Fourier analysis, Spectrum analysis

Subject Categories : Atmospheric Physics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE