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dc.contributor.authorGauer, Peter
dc.contributor.authorKern, Martin
dc.contributor.authorKristensen, Krister
dc.contributor.authorLied, Karstein
dc.contributor.authorRammer, Lambert
dc.contributor.authorSchreiber, Helmut
dc.date.accessioned2023-09-05T13:24:30Z
dc.date.available2023-09-05T13:24:30Z
dc.date.issued2007
dc.identifier.citationCold Regions Science and Technology, Vol. 50, No. 1-3, pp. 55-71.en_US
dc.identifier.urihttps://hdl.handle.net/11250/3087548
dc.description.abstractPulsed Doppler radar measurements from several avalanche releases are analyzed to gain an in-depth understanding of avalanche dynamics. A pulsed Doppler radar emits short pulses and samples the echo in distinct time intervals, corresponding to distance intervals (range gates). Frequency analysis of the echo signals, exploiting the Doppler-effect, yields the velocity distribution within the width of a range gate. Thus, it is possible to gain information on the front speed along the track and information on the velocity versus time at a specific location along the track. In addition to the avalanche velocity, information on the magnitude of accelerations/decelerations along the track can be derived. To this end, the velocities of a pair of adjoining range gates are compared. The acceleration/deceleration values can give hints to parameters in the friction terms of commonly used numerical avalanche models. The derived retarding accelerations imply a behavior different to the one proposed in those models. They also indicate a dependency of the retarding acceleration on the stage of the flow.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.subjectFull-Scale Measurementen_US
dc.subjectVelocityen_US
dc.subjectSnow Avalancheen_US
dc.subjectAvalanche-RnDen_US
dc.subjectSnøskred-FoUen_US
dc.titleOn pulsed Doppler radar measurements of avalanches and their implication to avalanche dynamics.en_US
dc.typeJournal articleen_US
dc.rights.holderElsevier B.V.en_US
dc.source.pagenumber55-71en_US
dc.source.volume50en_US
dc.source.journalCold Regions Science and Technologyen_US
dc.source.issue1-3en_US


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