| Autor: |
Lesovoi S.V., Kobets V.S. |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Solar-Terrestrial Physics, Vol 3, Iss 1, Pp 19-25 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2500-0535 |
| DOI: |
10.12737/article_58f96eeb8fa318.06122835 |
| Popis: |
The Siberian Solar Radio Telescope [Grechnev et al., 2011] is now being upgraded. The upgrading is aimed at providing the aperture synthesis imaging in the 4–8 GHz frequency range [Lesovoi et al., 2011, 2014] instead of the single-frequency direct imaging due to the Earth rotation. The first phase of the upgrading is a 48-antenna array — the Siberian Radioheliograph. One type of radioheliograph data represents correlation plots [bada-ry.iszf.irk.ru/srhCorrPlot.php]. In evaluating the covariance of two-level signals, these plots are sums of complex correlations, obtained for different antenna pairs. Bearing in mind that correlation of signals from an antenna pair is related to a spatial frequency, we can say that each value of the plot is an integral over a spatial spectrum. Limits of the integration are defined by the task. Only high spatial frequencies are integrated to obtain dynamics of com-pact sources. The whole spectrum is integrated to reach maximum sensitivity. We show that the covariance of two-level variables up to Van Vleck correction is a correlation coefficient of these variables. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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