Zobrazeno 1 - 10 of 96 pro vyhledávání: '"M. Petitdidier"'
1
Akademický článek
West African equatorial ionospheric parameters climatology based on Ouagadougou ionosonde station data from June 1966 to February 1998
Autor: F. Ouattara, C. Amory-Mazaudier, R. Fleury, P. Lassudrie Duchesne, P. Vila, M. Petitdidier
Publikováno v: Annales Geophysicae, Vol 27, Pp 2503-2514 (2009)
This study is the first which gives the climatology of West African equatorial ionosphere by using Ouagadougou station through three solar cycles. It has permitted to show the complete morphology of ionosphere parameters by analyzing yearly variat
Externí odkaz: https://doaj.org/article/b26f51c8eac5419dad03e546bf5f050b
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2
Akademický článek
Climatology of gravity wave activity during the West African Monsoon
Autor: P. Kafando, F. Chane-Ming, M. Petitdidier
Publikováno v: Annales Geophysicae, Vol 26, Pp 4081-4089 (2008)
Gravity wave activity is analysed in the lower stratosphere using 6 year radiosonde data (2001–2006) above two meteorological stations in the West African tropical region such as Niamey (13.47° N; 2.16° E) and Ouagadougou (12.35° N; 1.51° W)
Externí odkaz: https://doaj.org/article/856e6ea47c3e469bb8c68d0d6e3ce6d7
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3
Akademický článek
Equinox transition at the magnetic equator in Africa: analysis of ESF ionograms
Autor: B. J.-P. Adohi, P. M. Vila, C. Amory-Mazaudier, M. Petitdidier
Publikováno v: Annales Geophysicae, Vol 26, Pp 1777-1792 (2008)
We study equatorial night-time F layer behaviour from quarter-hourly ionograms at Korhogo/Ivory Coast (9.2° N, 5° W, dip lat. −2.4°) during local Spring March–April 1995, declining solar flux period, according to the magnetic activity. The
Externí odkaz: https://doaj.org/article/b99184ec45554d22b8317b82b8ecee61
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4
Akademický článek
Sun-Earth System Interaction studies over Vietnam: an international cooperative project
Autor: C. Amory-Mazaudier, M. Le Huy, Y. Cohen, V. Doumbia, A. Bourdillon, R. Fleury, B. Fontaine, C. Ha Duyen, A. Kobea, P. Laroche, P. Lassudrie-Duchesne, H. Le Viet, T. Le Truong, H. Luu Viet, M. Menvielle, T. Nguyen Chien, A. Nguyen Xuan, F. Ouattara, M. Petitdidier, H. Pham Thi Thu, T. Pham Xuan, N. Philippon, L. Tran Thi, H. Vu Thien, P. Vila
Publikováno v: Annales Geophysicae, Vol 24, Pp 3313-3327 (2006)
During many past decades, scientists from various countries have studied separately the atmospheric motions in the lower atmosphere, in the Earth's magnetic field, in the magnetospheric currents, etc. All of these separate studies lead today to th
Externí odkaz: https://doaj.org/article/8a9ab59a58a14b8a9a0a2f41addb0308
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5
Akademický článek
An attempt to calibrate the UHF strato-tropospheric radar at Arecibo using NexRad radar and disdrometer data
Autor: P. Kafando, M. Petitdidier
Publikováno v: Annales Geophysicae, Vol 22, Pp 4025-4034 (2004)
The goal of this paper is to present a methodology to calibrate the reflectivity of the UHF Strato-Tropospheric (ST) radar located at NAIC in Puerto Rico. The UHF lower relevant altitude is at 5.9km, the melting layer being at around 4.8km. The da
Externí odkaz: https://doaj.org/article/d812e539c82640b58afc434c62164fe8
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6
Akademický článek
Stochastic Maximum Likelihood (SML) parametric estimation of overlapped Doppler echoes
Autor: E. Boyer, M. Petitdidier, P. Larzabal
Publikováno v: Annales Geophysicae, Vol 22, Pp 3983-3993 (2004)
This paper investigates the area of overlapped echo data processing. In such cases, classical methods, such as Fourier-like techniques or pulse pair methods, fail to estimate the first three spectral moments of the echoes because of their lack of
Externí odkaz: https://doaj.org/article/19d9b14b4b1242b8ba7ddd4e2dfb2bd3
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7
Akademický článek
Application of model-based spectral analysis to wind-profiler radar observations
Autor: E. Boyer, M. Petitdidier, W. Corneil, C. Adnet, P. Larzabal
Publikováno v: Annales Geophysicae, Vol 19, Pp 815-824 (2001)
A classical way to reduce a radar’s data is to compute the spectrum using FFT and then to identify the different peak contributions. But in case an overlapping between the different echoes (atmospheric echo, clutter, hydrometeor echo. . . ) e
Externí odkaz: https://doaj.org/article/c2dd9f96559641e2b55dc1aeaa0d8db3
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10
Gome ozone profiles retrieved by neural network techniques: A global validation with lidar measurements
Autor: Stefano Casadio, M. Iapaolo, D. P. J. Swart, Yasjka Meijer, Georg Hansen, Sophie Godin-Beekmann, I. S. McDermid, Thierry Leblanc, F. Del Frate, M. Petitdidier, Kerstin Stebel
Publikováno v: Journal of Quantitative Spectroscopy and Radiative Transfer
Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2007, 107 (1), pp.105-119. ⟨10.1016/j.jqsrt.2007.02.015⟩
Journal of Quantitative Spectroscopy and Radiative Transfer, 2007, 107 (1), pp.105-119. ⟨10.1016/j.jqsrt.2007.02.015⟩
Ozone profiles retrieved from Global Ozone Monitoring Experiment (GOME, flying on ERS-2 satellite) spectra from July 1995 to June 2003 by means of 2 independent neural network (NN) schemes have been validated with ozone lidar measurements performed a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b39a29e96d337e90902aa564cd0bf8f9
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