Accession Number : ADA181333

Title :   Phase Scintillation Under Weak and Strong Scatter Conditions.

Descriptive Note : Technical rept. 13 Mar 85-30 Sep 86,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Livingston,Robert C ; Dabbs,Teri M

PDF Url : ADA181333

Report Date : 30 Sep 1986

Pagination or Media Count : 40

Abstract : Equatorial observations from the DNA Wideband satellite have been analyzed to: (1) characterize the two component phase spectral form, and (2) estimate the effects of diffraction on the phase spectrum during strong scatter conditions. The average two component phase spectrum has a low frequency dependence of 1/f to the 2.3 power, and 1/f to the 3.9 power at high frequencies. These regimes are separated by a spectral break at about 650m. For weak scatter levels up to S sub 4 or = 0.5, diffraction errors are less than one radian, and phase spectral shape is independent of carrier frequency. At higher S sub 4 values, the spectrum is affected by diffraction at all spatial frequencies and its shape depends on carrier frequency. Keywords: Radio wave scintillation; Weak scatter; Strong scatter; Diffraction effects.

Descriptors :   *CARRIER FREQUENCIES, *RADIO WAVES, *SCINTILLATION, *SCATTERING, HIGH FREQUENCY, LOW FREQUENCY, LOW STRENGTH, PHASE, DIFFRACTION, ERRORS, SHAPE, SPATIAL DISTRIBUTION, SPECTRA

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE