On the estimation of temporal changes of snow water equivalent by spaceborne SAR interferometry: a new application for the Sentinel-1 mission

Title:

On the estimation of temporal changes of snow water equivalent by spaceborne SAR interferometry: a new application for the Sentinel-1 mission

Creator:

Conde, Vasco, Nico, Giovanni, Mateus, Pedro, Catalão, João, Kontu, Anna, and Gritsevich, Maria

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6c012ab1-0bde-48df-891f-d9981401e430
uuid:6c012ab1-0bde-48df-891f-d9981401e430
doi:10.2478/johh-2018-0003

Subject:

Snow Water Equivalent (SWE), Synthetic Aperture Radar (SAR), SAR interferometry (InSAR), and Sentinel-1

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In this work we present a methodology for the mapping of Snow Water Equivalent (SWE) temporal variations based on the Synthetic Aperture Radar (SAR) Interferometry technique and Sentinel-1 data. The shift in the interferometric phase caused by the refraction of the microwave signal penetrating the snow layer is isolated and exploited to generate maps of temporal variation of SWE from coherent SAR interferograms. The main advantage of the proposed methodology with respect to those based on the inversion of microwave SAR backscattering models is its simplicity and the reduced number of required in-situ SWE measurements. The maps, updated up to every 6 days, can attain a spatial resolution up to 20 m with sub-centimetre ΔSWE measurement accuracy in any weather and sun illumination condition. We present results obtained using the proposed methodology over a study area in Finland. These results are compared with in-situ measurements of ΔSWE, showing a reasonable match with a mean accuracy of about 6 mm.

Language:

Slovak

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

Journal of hydrology and hydromechanics | 2019 Volume:67 | Number:1

Harvested from:

CDK

Metadata only:

false