Zobrazeno 1 - 10
of 149
pro vyhledávání: '"A.S. Gurvich"'
Publikováno v:
Advances in Space Research. 14:61-64
The vertical temperature spectra within the middle stratosphere (20–30 km) was measured using two independent techniques. The first technique involves orbital station observations of star scintillation during their occultation by the Earth's atmosp
Autor:
A.S. Gurvich, A.I. Kon
Publikováno v:
Journal of Electromagnetic Waves and Applications. 7:1343-1353
A study is done for the angular dependence of the back scattered signal power from anisotropic turbulent inhomogeneities which is described in Born approximation with the help of the power spectrum model with constant anisotropy. The aspect sensitivi
Autor:
A.S. Gurvich, A.I. Kon
Publikováno v:
Journal of Electromagnetic Waves and Applications. 6:107-118
Publikováno v:
Geophysical Research Letters
Geophysical Research Letters, 2009, 36 (5), pp.L05811. ⟨10.1029/2008GL036726⟩
Geophysical Research Letters, American Geophysical Union, 2009, 36 (5), pp.L05811. ⟨10.1029/2008GL036726⟩
Geophysical Research Letters, 2009, 36 (5), pp.L05811. ⟨10.1029/2008GL036726⟩
Geophysical Research Letters, American Geophysical Union, 2009, 36 (5), pp.L05811. ⟨10.1029/2008GL036726⟩
International audience; Using satellite measurements of stellar scintillation allows quantifying gravity waves (GW) in the stratosphere and their breaking into turbulence. GW and turbulence spectra parameters are retrieved by fitting modeled scintill
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10facade0778ffbe0e71492ba17ba820
https://hal.science/hal-00367488
https://hal.science/hal-00367488
Publikováno v:
Applied optics. 40(6)
We describe refractive and chromatic effects, both regular and random, that occur during star occultations by the Earth's atmosphere. The scintillation that results from random density fluctuations, as well as the consequences of regular chromatic re
Autor:
G.M. Grechko, A.S. Gurvich
Publikováno v:
Advances in Space Research. 10:21-24
Numerous observations from space towards the Earth's horizon have been performed to study the thin structure of the middle atmosphere. The following layers under 1 km thick have been observed: aerosol (altitudes, 8–16 km), ozone (20–30 km), nocti
Autor:
Gilbert Barrot, O. Fanton d' Andon, Laura Thölix, Thorsten Fehr, A.S. Gurvich, Erkki Kyrölä, L. Saavedra, V. Kan, Francis Dalaudier, S. Hassinen, J. L. Bertaux, Viktoria Sofieva, Filip Vanhellemont, M. Guirlet, Johanna Tamminen, Annika Seppälä, Antoine Mangin, R. Fraisse, R. Koopman, Paul Snoeij, Didier Fussen, Leif Backman, Alain Hauchecorne
Publikováno v:
Geophysical Research Letters
Geophysical Research Letters, 2007, 34, pp.L03812. ⟨10.1029/2006GL028132⟩
Geophysical Research Letters, American Geophysical Union, 2007, 34, pp.L03812. ⟨10.1029/2006GL028132⟩
Geophysical Research Letters, 2007, 34, pp.L03812. ⟨10.1029/2006GL028132⟩
Geophysical Research Letters, American Geophysical Union, 2007, 34, pp.L03812. ⟨10.1029/2006GL028132⟩
Stellar scintillations observed through the Earth atmosphere are caused by air density irregularities generated mainly by internal gravity waves and turbulence. We present global analysis of scintillation variance in two seasons of year 2003 based on
Publikováno v:
Journal of Geophysical Research: Atmospheres
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2007, 112 (D12), pp.D12113. ⟨10.1029/2006JD007483⟩
Journal of Geophysical Research: Atmospheres, 2007, 112 (D12), pp.D12113. ⟨10.1029/2006JD007483⟩
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2007, 112 (D12), pp.D12113. ⟨10.1029/2006JD007483⟩
Journal of Geophysical Research: Atmospheres, 2007, 112 (D12), pp.D12113. ⟨10.1029/2006JD007483⟩
Exploitation of stellar scintillation allows studying air density irregularities in the stratosphere. In this paper, we develop a methodology for reconstruction of internal gravity wave (IGW) and turbulence parameters using scintillation measurements
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0792afeda230dface89e1bdc62858f0
https://hal.archives-ouvertes.fr/hal-00161586
https://hal.archives-ouvertes.fr/hal-00161586
Publikováno v:
Journal of Geophysical Research: Atmospheres
Journal of Geophysical Research: Atmospheres, 2005, 110 (11), pp.D11110. ⟨10.1029/2004JD005536⟩
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2005, 110 (11), pp.D11110. ⟨10.1029/2004JD005536⟩
Journal of Geophysical Research: Atmospheres, 2005, 110 (11), pp.D11110. ⟨10.1029/2004JD005536⟩
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2005, 110 (11), pp.D11110. ⟨10.1029/2004JD005536⟩
International audience; The scintillations of stars observed through the Earth's atmosphere are generated by random irregularities of air density. We propose the qualitative theory for description of coherency and correlations of optical scintillatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f811fd3998e4a0c25c1c1d74100c07e4
https://hal.science/hal-00069272/document
https://hal.science/hal-00069272/document
Publikováno v:
Optica Acta: International Journal of Optics. 26:543-553
The paper presents the results of the theoretical and experimental studies of the four-point field coherence function o 4 of a wave propagating in a turbulent medium. On the basis of the asymptotic method, expressions for the complex value of o 4 in