Abstract
The use of interplanetary scintillations for probing otherwise inaccessible regions of the solar wind is reviewed. A comparison with space-craft observations in the ecliptic is used as a calibration for the scintillation observations. Recent observations at high latitudes and near the Sun are discussed from this viewpoint. A new analysis which uses both scintillation and angular scattering observations to estimate the electron density spectrum is introduced. The spectrum appears to have a high frequency ‘cutoff’ which varies slowly with solar distances and may also have a relatively flat region just below the cutoff frequency.
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Armstrong, J. A.: 1975, ‘Observations of Interplanetary Scintillation at 74 MHz’, Ph.D. Thesis, University of California, San Diego.
Armstrong, J. A. and Coles, W. A.: 1972, ‘Analysis of Three Station Interplanetary Scintillation’, J. Geophys. Res. 77, 4602.
Blessing, R. G. and Dennison, P. A.: 1972, ‘Coronal Broadening of the Crab Nebula 1969–1971’, Proc. ASA 2, 84.
Bourgois, G.: 1969, ‘Scintillations Interplanétaire des radiosources à 2695 MHz’, Astron. Astrophys. 2, 209.
Bourgois, G. and Cheynet, C.: 1972, ‘Observations of the Interplanetary Medium and of the Structure of Radio Scources Using Higher Moments of Interplanetary Scintillations’, Astron. Astrophys. 21, 25.
Brandt, J. C., Harrington, R. S., and Rosen, R. G.: 1975, ‘Interplanetary gas, 20, Does the radial solar wind speed increase with latitude?’, Astrophys. J. 196, 877.
Cohen, M. H. and Gundermann, E. J.: 1969, ‘Interplanetary Scintillations IV, Observations near the Sun’, Astrophys. J. 155, 645.
Cohen, M. H., Gundermann, E. J., and Harris, D. E.: 1967, ‘New Limits on the Diameters of Radio Sources’, Astrophys. J. 150, 767.
Coles, W. A., Harmon, J. K., Lazarus, A. J., and Sullivan, J. D.: 1975, ‘Comparison of 74 MHz IPS and IMP7 Observations of the Solar Wind during 1973’, EOS (Trans. AGU) 56, 440.
Coles, W. A. and Rickett, B. J.: 1976, ‘IPS Observations of the Solar Wind Speed out of the Ecliptic’, J. Geophys. Res. 81, 4797.
Dennison, P. A. and Hewish, A.: 1967, ‘The Solar Wind outside the Plane of the Ecliptic’, Nature 213, 343.
Ekers, R. D. and Little, L. T.: 1971, ‘The Motion of the Solar Wind close to the Sun’, Astron. Astrophys. 10, 310.
Erickson, W. C.: 1969, ‘The Radio-wave Scattering Properties of the Solar Corona’, Astrophys. J. 139, 1290.
Goldstein, R. M.: 1969, ‘Superior Conjunction of Pioneer 6’, Science 166, 598.
Harmon, J. K.: 1975, ‘Scintillation Studies of the Density Microstructure of the Solar Wind Plasma’, Ph.D. Thesis, University of California, San Diego.
Hewish, A. and Wyndham, J. D.: 1963, ‘The Solar Corona in Interplanetary Space’, Monthly Notices Roy. Astron. Soc. 126, 469.
Hewish, A., Scott, P. F., and Wills, D.: 1964, ‘Interplanetary Scintillation of Small Diameter Radio Sources’, Nature 203, 1214.
Intriligator, D. S. and Wolfe, J. H.: 1970, ‘Preliminary Power Spectra of the Interplanetary Plasma’, Astrophys. J. 162, L187.
Kaufman, J. J.: 1976, ‘Measurements of Solar Wind Velocity and Compact Radio Source Structure from 74 MHz Interplanetary Scintillations’, Ph.D. Thesis, University of California at San Diego.
Little, L. T. and Matheson, D. N.: 1971, ‘Angular Distribution of Radio Waves scattered by the Interplanetary Medium’, Nature 234, 29.
Marians, M.: 1975, ‘Computed Scintillation Spectra for Strong Turbulence’, Radio Sci. 10, 115.
Milne, R.: 1975, private communication.
Neugebauer, M.: 1976, ‘The Enhancement of Solar Wind Fluctuations at the Proton Thermal Gyroradius’, J. Geophys. Res. 81, 2447.
Okoye, S. E. and Hewish, A.: 1967, ‘Irregularities of Plasma Density in the Solar Neighborhood’, Monthly Notices Roy. Astron. Soc. 137, 287.
Prokhorov, A. M., Bunkin, F. V., Gochelashvily, K. S., and Shishov, V. I.: 1975, ‘Laser Irradiance Propagation in Turbulent Media’, Proc. Inst. Elec. Electron. Engrs. 63, 790.
Purcell, G. H.: 1973, Ph.D. Thesis, California Institute of Technology.
Rao, A. P., Bhandari, S. M., and Ananthakrishan, S.: 1974, ‘Observations of Interplanetary Scintillations at 327 MHz’, Aust. J. Phys. 27, 105.
Rhodes, E. J., Jr. and Smith, E. J.: 1975, ‘Multi-spacecraft Study of the Solar Wind velocity at Interplanetary Sector Boundaries’, J. Geophys. Res. 80, 917.
Rickett, B. J., Sime, D. G., Sheeley, Jr., N. R., Crockett, W. R., and Tousey, R.: 1976, J. Geophys. Res. 81, 3845.
Rumsey, V. H.: 1975, ‘Scintillations due to a Concentrated Layer with a Power-law Turbulence Spectrum’, Radio Sci. 10, 107.
Scott, S. L.: 1976, ‘Interpretation of Multi-station High Frequency Observations of Interplanetary Scintillations’, M.Sc. Thesis, University of California, San Diego.
Sime, D. G.: 1976, ‘Structure of the Solar Wind inferred from Interplanetary Scintillations’, Ph.D. Thesis, University of California, San Diego.
Slee, O. B.: 1966, ‘The Outer Solar Corona during the Declining Portion of the Solar Activity Cycle’, Planet. Space Sci. 14, 255.
Sullivan, J. D., Belcher, J. W., and Lazarus, A. J.: 1975, ‘Microscale Density Fluctuations and Their Relation to Solar Wind Stream Structure’, EOS (Trans. AGU) 56, 440.
Unti, T. W., Neigebauer, M., and Goldstein, B. E.: 1973, ‘Direct Measurements of Solar Wind Fluctuations between 0.0048 and 13.3 Hz’, Astrophys. J. 180, 591.
Vandenberg, N. R.: 1974, ‘Meter-wavelength Observations of Pulsars Using Very-long-baseline Interferometry’, Ph. D. Thesis, University of Maryland.
Vitkevich, V. V. and Vlasov, V. I.: 1970, ‘Radio-astronomical Investigations of the Drift of the Inhomogeneous Interplaneatry Plasma’, Soviet Astron., AJ 13, 669.
Ward, B. D.: 1975, ‘Radiowave Scattering in the Interplanetary Medium’, Ph.D. Thesis, Adelaide University.
Watanabe, T. and Kakinuma, T.: 1972, ‘The Recurrent Solar Wind Streams observed by Interplanetary Scintillation of 3C48’, Publ. Astron. Soc. Japan 24, 459.
Watanabe, T., Shibasaki, K., and Kakinuma, T.: 1974, ‘Latitudinal Distribution of Solar Wind Velocity and its Relation to Solar EOV Corona’, J. Geophys. Res. 79, 3891.
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Coles, W.A. Interplanetary scintillation. Space Sci Rev 21, 411–425 (1978). https://doi.org/10.1007/BF00173067
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DOI: https://doi.org/10.1007/BF00173067