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Université de Sherbrooke

1. Laliberté, Jacob. Détection de la stratigraphie en milieu de neige sèche à l'aide d'un radar à onde continue modulé en fréquence (FMCW) de 24 GHz.

Degree: 2020, Université de Sherbrooke

Abstract : Considering the increased popularity for backcountry mountain recreation activities, problematic snowpack interfaces are currently of great interest given their impact on snow stability. As such, the identification of interface vertical locations in the snowpack and their spatial variability is essential for avalanche danger forecasting. The Gaspé Peninsula specific climate (strong winds, rain-on-snow events, winter thaw and prolonged very cold temperatures) often leads to a complex snowpack development, where the need of improved monitoring is important. The goal of this research is to asses an automated method to detect contrasted snow interfaces (i.e. contrasted layers) using a 24 GHz Frequency Modulated Continuous Wave (FMCW) portable radar. Based on different in-situ configurations (upward and downward looking), we compared the radar amplitude signals with in-situ snow geophysical measurements, including Snow Micro Penetrometer. Radar measurements have been done following two different protocols: 1) mobile radar looking-up and down in order to understand the radar-snow wave interactions and optimize its parameters for spatial variability assessment of contrasted snow layers and 2) fixed radar mounted on a tripod looking down to evaluate its potential to study snow stratigraphy temporal variability in one fixed location. Results show good agreements with compared validation data with 80% of manually identified interfaces detection and a vertical positioning error of 3 cm. The presented FMCW radar appears to have a good potential for spatial and temporal variability assessment of snowpack stratigraphy. Advisors/Committee Members: Langlois, Alexandre (advisor), Gauthier, Francis (advisor).

Subjects/Keywords: Radar FMCW 24 GHz; Neige; Stratigraphie; Variabilité temporelle; Variabilité spatiale; Snow Micro Penetrometer; Avalanche; Chic-Chocs

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Laliberté, J. (2020). Détection de la stratigraphie en milieu de neige sèche à l'aide d'un radar à onde continue modulé en fréquence (FMCW) de 24 GHz. (Masters Thesis). Université de Sherbrooke. Retrieved from http://hdl.handle.net/11143/17848

Chicago Manual of Style (16th Edition):

Laliberté, Jacob. “Détection de la stratigraphie en milieu de neige sèche à l'aide d'un radar à onde continue modulé en fréquence (FMCW) de 24 GHz.” 2020. Masters Thesis, Université de Sherbrooke. Accessed March 01, 2021. http://hdl.handle.net/11143/17848.

MLA Handbook (7th Edition):

Laliberté, Jacob. “Détection de la stratigraphie en milieu de neige sèche à l'aide d'un radar à onde continue modulé en fréquence (FMCW) de 24 GHz.” 2020. Web. 01 Mar 2021.

Vancouver:

Laliberté J. Détection de la stratigraphie en milieu de neige sèche à l'aide d'un radar à onde continue modulé en fréquence (FMCW) de 24 GHz. [Internet] [Masters thesis]. Université de Sherbrooke; 2020. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11143/17848.

Council of Science Editors:

Laliberté J. Détection de la stratigraphie en milieu de neige sèche à l'aide d'un radar à onde continue modulé en fréquence (FMCW) de 24 GHz. [Masters Thesis]. Université de Sherbrooke; 2020. Available from: http://hdl.handle.net/11143/17848

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