Sökning: onr:"swepub:oai:DiVA.org:uu-97796" >
Ionospheric plasma ...
Ionospheric plasma density irregularities measured by stimulated electromagnetic emission
-
- Norin, Lars (författare)
- Uppsala universitet,Astronomi och rymdfysik,Institutet för rymdfysik, Uppsalaavdelningen
-
Grach, S. M. (författare)
-
- Leyser, Thomas (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
-
visa fler...
-
- Thidé, Bo (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
-
Sergeev, E. N. (författare)
-
Berlin, M. (författare)
-
visa färre...
-
(creator_code:org_t)
- 2008
- 2008
- Engelska.
-
Ingår i: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 113:A9, s. A09314-
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- It is well known that ionospheric plasma turbulence can be conveniently generated by controlled injection of powerful high-frequency radio beams from the ground. Irradiation of the ionosphere with such radio waves leads to the formation of plasma density structures, striations, and the generation of secondary electromagnetic radiation, a phenomenon known as stimulated electromagnetic emission (SEE). In this paper we present experimental results of the dependence of SEE on decreasing excitation levels of the striations. In the experiments the frequency of the injected radio beam was varied near the fifth harmonic of the local ionospheric electron gyro frequency. We use the SEE measurements to obtain transverse length scales of the striations involved in the generation of the SEE. Our results show that different spectral features of the SEE display different temporal dynamics, suggesting that they are related to striations with different transverse length scales (1 less than or similar to L-perpendicular to less than or similar to 25 m).
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Astronomy and astrophysics
- Astronomi och astrofysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas