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| Titre : |
C-Band radar cross section of the Guyana rain forest : possible use a reference terget for spaceborne radars
|
| Titre de série : | Remote Sensing of Environment, Vol 27 - n°1 |
| Auteur(s) : |
R. Bernard, Auteur (et co-auteur)
Daniel Vidal-Madjar, Auteur (et co-auteur) |
| Type de document : | Tiré à part |
| Sujets : | Radar ; Guyane française ; Télédétection ; Forêt tropicale humide |
| Résumé : |
The results of a C-band radar campaign over the French Guyana rain forest are analyzed, showing the stability and homogeneity of the forest when seen by a low resolution radar. A β value of - 8.35 ± 0.3 dB has been measured during the campaign, nearly constant with the incidence angle. Some possible diurnal variation or rain effect have been identified, of the order of 0.5 dB, with a maximum NRCS at the end of the night (0600 LT), as it was already observed by the SEASAT scatterometer in Ku band. Such a constant γ is well represented by a pure and isotropic volume diffusion model, and depends mainly on the single scattering albedo, ratio of the volume extinction to the volume backscattering coefficients. This campaign, organized by the European Space Agency, has shown that the tropica[...] The results of a C-band radar campaign over the French Guyana rain forest are analyzed, showing the stability and homogeneity of the forest when seen by a low resolution radar. A β value of - 8.35 ± 0.3 dB has been measured during the campaign, nearly constant with the incidence angle. Some possible diurnal variation or rain effect have been identified, of the order of 0.5 dB, with a maximum NRCS at the end of the night (0600 LT), as it was already observed by the SEASAT scatterometer in Ku band. Such a constant γ is well represented by a pure and isotropic volume diffusion model, and depends mainly on the single scattering albedo, ratio of the volume extinction to the volume backscattering coefficients. This campaign, organized by the European Space Agency, has shown that the tropical rain forests such as the Amazon Forest can provide a good reference distributed target for the calibration of spaceborne scatterometers, even at C-band, which will be the frequency of the ERS-1 Wind Scatterometer. |
| Date de publication : | 1989 |
| Format : | pp. 25-36 / graph., réf. |
| Langue(s) : | Anglais |
| Lien vers la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=149854 |
Exemplaires (1)
| Localisation | Emplacement | Pôle | Section | Cote | Support | Disponibilité |
|---|---|---|---|---|---|---|
| Kourou | Archives | AgroParisTech-Kourou | TP15046 | Papier Périodique | Empruntable Disponible |