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Measurement of snow water equivalent using drone-mounted ultra-wide-band radar

Permanent link
https://hdl.handle.net/10037/22682
DOI
https://doi.org/10.3390/rs13132610
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Date
2021-07-02
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Author
Jenssen, Rolf Ole R.; Jacobsen, Svein Ketil
Abstract
The use of unmanned aerial vehicle (UAV)-mounted radar for obtaining snowpack parameters has seen considerable advances over recent years. However, a robust method of snow density estimation still needs further development. The objective of this work is to develop a method to reliably and remotely estimate snow water equivalent (SWE) using UAV-mounted radar and to perform initial field experiments. In this paper, we present an improved scheme for measuring SWE using ultra-wide-band (UWB) (0.7 to 4.5 GHz) pseudo-noise radar on a moving UAV, which is based on airborne snow depth and density measurements from the same platform. The scheme involves autofocusing procedures with the frequency–wavenumber (F–K) migration algorithm combined with the Dix equation for layered media in addition to altitude correction of the flying platform. Initial results from field experiments show high repeatability (R > 0.92) for depth measurements up to 5.5 m, and good agreement with Monte Carlo simulations for the statistical spread of snow density estimates with standard deviation of 0.108 g/cm3. This paper also outlines needed system improvements to increase the accuracy of a snow density estimator based on an F–K migration technique.
Publisher
MDPI
Citation
Jenssen, Jacobsen. Measurement of snow water equivalent using drone-mounted ultra-wide-band radar. Remote Sensing. 2021;13(13):1-17
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