Multi-sensor SAR data for improved modeling of microwave brightness temperature over boreal forest

Oleg Antropov, Jaakko Seppänen, Thomas Jagdhuber, Hallikainen Martti, Jaan Praks

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

Abstract

Here, we investigate multiple ways of assimilating synthetic aperture radar (SAR) data to L-band Microwave Emission of the Biosphere (L-MEB) model to enhance the model performance over forested areas in the boreal zone. L- and C-band satellite SAR backscatter data, X-band interferometric SAR coherence, as well as auxiliary data layers from forest authorities are used as a proxy in calculating the forest transmissivity, instead of traditionally used leaf area index (LAI) parameter. Our earlier experiments have shown, that when particularly ALOS PALSAR (L-band) and multitemporal composite Sentinel-1 (C-band) data were applied, an improved agreement was achieved between the measured and simulated brightness temperatures (TBs) over forests. Here, we extend our analysis and examine data acquired by ALOS PALSAR, ESA Sentinel-1, and TanDEM-X mission of DLR, as well as several other auxiliary datasets on forest parameters. Our proposed model based approach indicates the potential of an SAR-based estimation of forest volume transmissivity and represents a viable way of active-passive microwave satellite data fusion and incorporating readily available reference data.
Original languageEnglish
Title of host publication2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages361-364
ISBN (Electronic)978-1-5386-7150-4, 978-1-5386-7149-8
ISBN (Print)978-1-5386-7151-1
DOIs
Publication statusPublished - 31 Oct 2018
MoE publication typeA4 Article in a conference publication
Event38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain
Duration: 22 Jul 201827 Jul 2018

Publication series

SeriesIEEE International Geoscience and Remote Sensing Symposium Proceedings
Volume38
ISSN2153-6996

Conference

Conference38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
CountrySpain
CityValencia
Period22/07/1827/07/18

Keywords

  • ALOS PALSAR
  • Forest stem volume
  • Interferometric SAR coherence
  • Microwave radiometry
  • Remote sensing
  • Sentinel-1
  • Soil moisture
  • Synthetic aperture radar (SAR)
  • TanDEM-X

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