USE OF REFRACTIVE SCATTERING TO EXPLAIN SHF SCINTILLATIONS

被引:25
作者
CRAIN, CM
BOOKER, HG
FERGUSON, JA
机构
[1] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92039
[2] USN,CTR OCEAN SYST,SAN DIEGO,CA 92152
关键词
D O I
10.1029/RS014i001p00125
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Ionization structure perpendicular to the line of sight can cause total internal reflection at glancing incidence, leading to refractive scattering that can dominate diffractive scattering. The long‐wave cutoff in the spectrum of amplitude fluctuations then occurs, not at the Fresnel scale but at a larger scale that increases as the percentage fluctuation of ionization density increases. The additional amplitude fluctuation arising from the band of scales extending from the usual diffractive cutoff scale up to the refractive cutoff scale is capable of explaining strong SHF scintillation. It also lowers the estimates of the fluctuation of ionization density needed to explain strong VHF scintillation. The concept of refractive scattering is also likely to be applicable to SHF‐EHF scintillation phenomena in the troposphere. This paper is not subject to U.S. copyright. Published in 1979 by the American Geophysical Union.
引用
收藏
页码:125 / 134
页数:10
相关论文
共 35 条
  • [11] CRAFT HD, 1972, 10TH AIAA AER SCI M
  • [12] FREMOUW EJ, 1976, COSPAR S GEOPHYSICAL
  • [13] EVIDENCE FOR A RAYLEIGH-TAYLOR TYPE INSTABILITY AND UPWELLING OF DEPLETED DENSITY REGIONS DURING EQUATORIAL SPREAD-F
    KELLEY, MC
    HAERENDEL, G
    KAPPLER, H
    VALENZUELA, A
    BALSLEY, BB
    CARTER, DA
    ECKLUND, WL
    CARLSON, CW
    HAUSLER, B
    TORBERT, R
    [J]. GEOPHYSICAL RESEARCH LETTERS, 1976, 3 (08) : 448 - 450
  • [14] KLOSTERMEYER J, J GEOPHYS RES
  • [15] MODEL COMPUTATIONS OF POWER SPECTRA FOR IONOSPHERIC SCINTILLATIONS AT GHZ FREQUENCIES
    LIU, CH
    YEH, KC
    [J]. JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1977, 39 (02): : 149 - 156
  • [16] COMPUTED SCINTILLATION SPECTRA FOR STRONG TURBULENCE
    MARIANS, M
    [J]. RADIO SCIENCE, 1975, 10 (01) : 115 - 119
  • [17] PLASMA BUBBLES AND IRREGULARITIES IN EQUATORIAL IONOSPHERE
    MCCLURE, JP
    HANSON, WB
    HOFFMAN, JH
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1977, 82 (19): : 2650 - 2656
  • [18] ROTTGER J, J ATMOS TERR PHYS
  • [19] SCINTILLATIONS DUE TO A CONCENTRATED LAYER WITH A POWER-LAW TURBULENCE SPECTRUM
    RUMSEY, VH
    [J]. RADIO SCIENCE, 1975, 10 (01) : 107 - 114
  • [20] INTERPLANETARY SCINTILLATIONS .I. THEORY
    SALPETER, EE
    [J]. ASTROPHYSICAL JOURNAL, 1967, 147 (02) : 433 - +