Analysis of Snow Coherence Conservation for SWE Retrieval at L-, S-, C-and X-Bands

J. Jorge Ruiz, J. Lemmetyinen, A. Kontu, R. Tarvainen, J. Pulliainen, R. Vehmas, J. Praks

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Accurate measurement of Snow Water Equivalent (SWE) from remote sensors is still an on-going topic with many open challenges. Interferometric Synthetic Aperture Radars (InSAR) offers the possibility of retrieving SWE changes between acquisitions by exploiting the relation between the interferometric phase, the snow depth and the water contained on it. However, it is susceptible to estimation errors due to loss of coherence. Sources of decorrelation in snow have not been exhaustively investigated. Here we present the results from the SWE retrieval during both the 2019–2020 and 2020–2021 winters and an analysis of various environmental parameters on the snow coherence using SodSAR (Sodankylä SAR). SodSAR is a 1-10GHz tower-based fully polarimetric SAR with InSAR capabilities operating in northern Finland. Acquisitions were made every 12 hours for the 2019–2020 winter and every 6 hours for the 2020–2021 winter. In-situ instruments are used for validation and comparison.
Original languageEnglish
Title of host publication2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS
Number of pages4
ISBN (Print)978-1-6654-4762-1
Publication statusPublished - 12 Oct 2021
MoE publication typeA4 Article in a conference publication
EventInternational Geoscience and Remote Sensing Symposium - Virtual, Online, Brussels, Belgium
Duration: 11 Jul 202116 Jul 2021


ConferenceInternational Geoscience and Remote Sensing Symposium
Abbreviated titleIGARSS


  • Degradation
  • Radar remote sensing
  • Estimation error
  • Snow
  • Instruments
  • Coherence
  • Decorrelation


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