Stellar scintillations in spacecraft occultation experiment for atmospheric irregularities with variable anisotropy

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• 作者：V. Kan
• 关键词：spacecraft sounding of atmosphere ; variable anisotropy of density irregularities ; stellar scintillations ; spectra of week scintillations
• 刊名：Atmospheric and Oceanic Optics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：29
• 期：1
• 页码：42-55
• 全文大小：747 KB
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• 作者单位：V. Kan (1)
  
  1. M. Obukhov Institute of Atmospheric Physics, Pyzhevskii per. 3, Moscow, 109017, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Applied Optics, Optoelectronics and Optical Devices
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：2070-0393

文摘

The properties of stellar scintillations are studied in an occultation experiment during synchronous sounding of the atmosphere at different wavelengths. The scintillation auto and coherence spectra are calculated for the model of three-dimensional (3D) spectrum of atmospheric irregularities with variable anisotropy. In the calculations, we used the dependence of the anisotropy coefficient on the irregularity scale derived from chromatic stellar scintillation measurements with fast GOMOS (Global Ozone Monitoring by Occultation of Stars) photometers in tangential occultations. Calculations are carried out in approximations of the equivalent phase screen and weak scintillations. The regime of weak scintillations for low-orbit satellites corresponds to altitudes of ray perigee above 25–30 km. The scintillation spectra are compared for models of 3D spectrum of atmospheric irregularities with variable and constant anisotropy, and their common parameters and features are found.