dorsal/arxiv
View SchemaTowards a model of incoherent scatter signal spectra without averaging over sounding runs
| Authors | Oleg . I. Berngardt |
|---|---|
| Categories | |
| ArXiv ID | physics/0208001 |
| URL | https://arxiv.org/abs/physics/0208001 |
Abstract
This paper offers a model for incoherent scatter signal spectra without averaging the received signal over sounding runs (realizations). The model is based on the existent theory of radio waves single scattering from the medium dielectric permittivity irregularities, and on the existing kinetic theory of the plasma thermal irregularities. The proposed model is obtained for the case of monostatic sounding. The model shows that the main contribution to the received signal is made by ion-acoustic waves caused by certain spatial harmonics of the ions number phase density. The model explains the width and form of the signal spectrum by macroscopic characteristics of the medium, and its fine 'peaked' structure by characteristics of the ions number phase density. The notion of the weight volume is introduced to define the domain of wave vectors and velocities in the spatial spectrum of the ions number phase density which makes the main contribution to the formation of the scattered signal. This weight volume depends on the antenna pattern, the form of the sounding signal, and on the time window of spectral processing, as well as on ionospheric plasma macroscopic parameters: electron and ion temperatures, ion composition, and the drift velocity. Within the context of additional assumption about the ions number phase density, the proposed model was tested by the data from the Irkutsk incoherent scatter radar. The test showed a good fit of the model to experiment.
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"abstract": "This paper offers a model for incoherent scatter signal spectra without\naveraging the received signal over sounding runs (realizations). The model is\nbased on the existent theory of radio waves single scattering from the medium\ndielectric permittivity irregularities, and on the existing kinetic theory of\nthe plasma thermal irregularities. The proposed model is obtained for the case\nof monostatic sounding. The model shows that the main contribution to the\nreceived signal is made by ion-acoustic waves caused by certain spatial\nharmonics of the ions number phase density. The model explains the width and\nform of the signal spectrum by macroscopic characteristics of the medium, and\nits fine \u0027peaked\u0027 structure by characteristics of the ions number phase\ndensity. The notion of the weight volume is introduced to define the domain of\nwave vectors and velocities in the spatial spectrum of the ions number phase\ndensity which makes the main contribution to the formation of the scattered\nsignal. This weight volume depends on the antenna pattern, the form of the\nsounding signal, and on the time window of spectral processing, as well as on\nionospheric plasma macroscopic parameters: electron and ion temperatures, ion\ncomposition, and the drift velocity. Within the context of additional\nassumption about the ions number phase density, the proposed model was tested\nby the data from the Irkutsk incoherent scatter radar. The test showed a good\nfit of the model to experiment.",
"arxiv_id": "physics/0208001",
"authors": [
"Oleg . I. Berngardt"
],
"categories": [
"physics.plasm-ph",
"physics.ao-ph"
],
"title": "Towards a model of incoherent scatter signal spectra without averaging over sounding runs",
"url": "https://arxiv.org/abs/physics/0208001"
},
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