Abstract
DURING the past year, a survey of radio sources at 195, 430, and 611 Mc/s has been undertaken at the Arecibo Ionospheric Observatory to determine the sources which scintillate as a result of irregularities in the interplanetary medium. The degree of the intensity scintillations observed on the Earth depends on the integrated fluctuations in the electron density along the line of sight in the interplanetary medium and on the scale size of these fluctuations1. Thus, by monitoring those sources which scintillate, some of the gross features of the interplanetary medium can be deduced. In particular, it should be possible to plot the passage of shock waves and the ejection of turbulent plasma associated with large solar flares, as the disturbance moves out from the Sun into the interplanetary region.
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References
Salpeter, E., Interplanetary Scintillations I., Theory, Cornell Univ., CRSR Rep. No. 242 (1966). Astrophys. J. (in the press).
Cohen, M., Gundermann, E., Hardebeck, H., and Sharp, L. E., Interplanetary Scintillations II., Observations, Cornell Univ., CRSR Report No. 241 (1966). Astrophys. J. (in the press).
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Neugebauer, M., and Snyder, C. W., J. Geophys. Res., 71, 4469 (1966).
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SHARP, L., HARRIS, D. Enhanced Interplanetary Scintillations associated with Solar Flares. Nature 213, 377–378 (1967). https://doi.org/10.1038/213377a0
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DOI: https://doi.org/10.1038/213377a0
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