RADARSAT Applications: Review of GlobeSAR Program
1996; Taylor & Francis; Volume: 22; Issue: 4 Linguagem: Inglês
10.1080/07038992.1996.10874664
ISSN1712-798X
AutoresR.J. Brown, Brian Brisco, Marc A. D'Iorio, C Prévost, Robert A. Ryerson, V. Singhroy,
Tópico(s)Advanced SAR Imaging Techniques
ResumoRÉSUMÉLa capacité d'acquérir des images au travers les nuages ou la nuit rend les capteurs radar très utiles pour diverses applications.Lors de la dernière décennie, on a assisté à une explosion dans le développement de la technologie et des applications des données radars satellitaires à des fins civiles. L'une de ces initiatives est RADARSAT, un satellite canadien à vocation commerciale dôté d'un capteur radar à synthèse d'ouverture (RSO). Pour stimuler l'utilisation des données RADARSAT à l'échelle internationale, le programme GlobeSAR fut mis sur pied en 1993. Le but de ce programme était le transfert de technologie et de développement des ressources humaines dans des pays en voie de développement dans le domaine des applications du RSO.La possibilité pour l'usager de choisir le mode d'acquisition de RADARSAT se traduit cependant par un niveau de complexité plus élevé lors de la commande et du choix des images. Un compromis est alors nécessaire entre couverture spatiale, résolution, nombre de visées et angle d'incidence lors de la commande, du traitement et de l'analyse des données.Cet article passe en revue quelques applications menées sous l'égide du programme GlobeSAR et fait des recommendations préliminaires pour le choix du mode d'acquisition optimal en fonction de l'application. On y traite aussi de l'utilisation de données auxiliaires pour complémenter celles du RSO. Finalement, on présente quelques images RADARSAT pour appuyer les résultats.SUMMARYRadar imagery, which can be acquired through clouds or at night, is ideal for many applications. These images, besides offering virtually guaranteed data collection, are useful for many applications on their own or in conjunction with imagery acquired in the visible and near-infrared portions of the electromagnetic spectrum. The last decade has seen a significant growth in radar remote sensing technology and applications with several satellite radar systems now available for civilian use. One of these, RADARSAT, is a Canadian led spaceborne program with a flexible synthetic aperture radar (SAR) to facilitate application development and operational/commercial use of radar imagery. In order to facilitate the international use of RADARSAT data a program called GlobeSAR was initiated in 1993. This has been a highly successful international program designed to transfer technology on SAR from Canada to the participating countries and to further develop applications of RADARSAT. While the flexibility in RADARSAT's beam modes and configuration enhances the use of the SAR data for geoscience applications it also adds complexity to the data ordering and selection process. The trade-offs between swath coverage, resolution, number of looks, and incidence angle must all be considered when ordering, processing, and analyzing the data. This paper describes applications studied during GlobeSAR and makes preliminary recommendations for selecting the optimum RADARSAT operating mode for these various applications. Ancillary data requirements for successful use of the SAR data are also addressed. This is followed by a presentation of several example images from RADARSAT chosen to illustrate the discussion. Additional informationNotes on contributorsR.J. Brown• R.J. Brown, M.A. D'Iorio, C. Prevost, R.A. Ryerson, and V. Singhroy are Scientists at Canada Centre for Remote Sensing, Natural Resources Canada, 588 Booth Street, Ottawa, Ontario, K1A 0Y7, Tel: (613) 947-1262, Fax:(613) 947-1385, e-mail: ron.brown@ccrs.nrcan.gc.caB. Brisco• B. Brisco is with Intermap Technologies, 2 Gurdwara Rd., Suite 200, Nepean, ON, Canada K2E 1A2, Tel: (613) 947-1262, Fax: (613) 947-1385 e-mail: brian.brisco@ccrs.nrcan.gc.caM.A. D'Iorio• R.J. Brown, M.A. D'Iorio, C. Prevost, R.A. Ryerson, and V. Singhroy are Scientists at Canada Centre for Remote Sensing, Natural Resources Canada, 588 Booth Street, Ottawa, Ontario, K1A 0Y7, Tel: (613) 947-1262, Fax:(613) 947-1385, e-mail: ron.brown@ccrs.nrcan.gc.caC. Prevost• R.J. Brown, M.A. D'Iorio, C. Prevost, R.A. Ryerson, and V. Singhroy are Scientists at Canada Centre for Remote Sensing, Natural Resources Canada, 588 Booth Street, Ottawa, Ontario, K1A 0Y7, Tel: (613) 947-1262, Fax:(613) 947-1385, e-mail: ron.brown@ccrs.nrcan.gc.caR.A. Ryerson• R.J. Brown, M.A. D'Iorio, C. Prevost, R.A. Ryerson, and V. Singhroy are Scientists at Canada Centre for Remote Sensing, Natural Resources Canada, 588 Booth Street, Ottawa, Ontario, K1A 0Y7, Tel: (613) 947-1262, Fax:(613) 947-1385, e-mail: ron.brown@ccrs.nrcan.gc.caV. Singhroy• R.J. Brown, M.A. D'Iorio, C. Prevost, R.A. Ryerson, and V. Singhroy are Scientists at Canada Centre for Remote Sensing, Natural Resources Canada, 588 Booth Street, Ottawa, Ontario, K1A 0Y7, Tel: (613) 947-1262, Fax:(613) 947-1385, e-mail: ron.brown@ccrs.nrcan.gc.ca
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