| Autor: | M. L. Kaiser, Yu. V. Tokarev, J.-L. Bougeret, Michael T. Rietveld, G. N. Boiko, G. P. Komrakov, Keith Goetz, V. A. Alimov, P. Rodriguez |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Nuclear and High Energy Physics Spacecraft business.industry Astronomy and Astrophysics Statistical and Nonlinear Physics Geodesy Spectral line Physics::Geophysics Electronic Optical and Magnetic Materials Intensity (physics) Interferometry Physics::Space Physics Angular resolution Electrical and Electronic Engineering Ionosphere business Decametre Radio wave Remote sensing |
| Zdroj: | Radiophysics and Quantum Electronics. 44:751-762 |
| ISSN: | 0033-8443 |
| DOI: | 10.1023/a:1013785430356 |
| Popis: | Results of the 1999 experiments on receiving radio-frequency signals from the SURA and EISCAT facilities on the WIND spacecraft at 5475 kHz are presented. Power and frequency distortions imposed by near-Earth plasmas on the response of SURA-EISCAT, an active decameter radio interferometer with a superlong baseline of ∼2000 km, are studied. Quasi-oscillatory variations in the intensity of the received radiation with a period of several tenths of a second and the corresponding maximum in the intensity fluctuation spectrum are observed during synchronized operation of the facilities under both quiet and perturbed geophysical conditions including the occurrence of mid-latitude F spread. Variations in the mean frequency of the spectral line both because of the motion of the spacecraft and the large-scale traveling ionospheric disturbances are detected. The obtained results are compared with the modern theoretical concept of propagation of short radio waves in a randomly irregular ionospheric plasma. The possibility to realize the limiting angular resolution of a ground-based decameter interferometer with a superlong baseline for observations of discrete space radio sources is discussed. |
| Databáze: | OpenAIRE |
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