| Titre | Satellite SAR observations of river ice cover: a RADARSAT-2 (C-band) and ALOS PALSAR (L-band) comparison |
| |
| Auteur | van der Sanden, J J ; Drouin, H |
| Source | CGU HS Committee on River Ice Processes and the Environment, 16th Workshop on River Ice; 2011 p. 1-19 |
| Image |  |
| Année | 2011 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20110200 |
| Réunion | CGU HS Committee on River Ice Processes and the Environment; 16th Workshop on River Ice; Winnipeg; CA; Septembre 18-22, 2011 |
| Document | livre |
| Lang. | anglais |
| Media | papier |
| Formats | pdf |
| Province | Territoires du Nord-Ouest |
| SNRC | 106M/09; 106M/16; 107B/04; 107B/06 |
| Région | Fleuve Mackenzie; Point Separation; Oniak Island; Inuvik |
| Lat/Long OENS | -134.5000 -134.0000 68.5000 67.5000 |
| Sujets | satellites; imagerie par satellite; télédétection; méthodes radar; imagerie radar; géophysique |
| Illustrations | cartes de localisation; tableaux; histogrammes; graphiques |
| Programme | Science de la télédétection spatiale |
| Diffusé | 2011 01 01 |
| Résumé | (disponible en anglais seulement)
In this paper we discuss the importance of microwave wavelength in terms of the interaction of microwaves with river ice cover and demonstrate its effect
through combined analysis of RADARSAT-2 data (C-band, 5.55 cm nominal wavelength), ALOS PALSAR data (L-band, 23.62 cm nominal wavelength), and ground reference data for ice covers found in the Middle Channel of the Mackenzie River at Inuvik. The
operating wavelength of a given SAR system governs its depth of penetration and affects its sensitivity to surface roughness and the presence of volume scatterers (e.g. air bubbles in the case of river ice). Our results show that RADARSAT-2, thanks
to its shorter operating wavelength, offers more potential for the classification of river ice cover types than ALOS PALSAR. The HV-polarisation represents the best performing linear polarisation but performs less well than selected polarimetric
variables. Both RADARSAT-2 and ALOS PALSAR backscatter measurements are found to make rather weak predictors of river ice cover thickness. To a large degree this is due to the very strong effect of ice structure on radar backscatter. |
| GEOSCAN ID | 289264 |
|
|