A vegetation correction methodology applied for soil moisture retrieval from C-band radar observations

A.T. Joseph, R. van der Velde, P.E. O'Neill, R. Lang, T. Gish

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Abstract

This research presents a methodology to correct backscatter (sigmadeg) observations for vegetation effects. The proposed methodology is based on the concept that the ratio between the surface scattering over the total amount of scattering (sigmadeg surface /sigmadeg soil ) is affected only by the vegetation and can be described as a function of the vegetation water content. The data set used in this study was collected at USDA's Optimizing Production Inputs for Economic and Environmental Enhancement (OPE 3 ) experimental site in Beltsville, Maryland (USA) over a corn growth cycle in 2002 and includes C-band (4.75 GHz) HH- and VV-polarized observations acquired at incidence angles of 15, 35 and 55 degrees. During this period the corn crops reached peak biomass of 6.6 kg m -2 and a soil moisture range varying from 0.02 to 0.26 cm 3 cm -3 . The results show that through application of the proposed vegetation correction methodology the soil moisture retrieval accuracy can be improved from 0.033 to 0.032 cm 3 cm -3 , 0.049 to 0.033 cm 3 cm -3 , and 0.079 to 0.047 cm 3 cm -3 at incidence angles of 15, 35 and 55 degrees, respectively.
Original languageEnglish
Title of host publicationIGARSS 2008 : Proceedings of the 2008 IEEE international geoscience and remote sensing sympsosium : Geoscience and remote sensing, the next generation, 6-11 July 2008 Boston, MA, USA. Piscataway : IEEE, 2008. ISBN 978-1-4244-2807-6. pp. II 398 - II 401
Place of PublicationBoston, USA
PublisherIEEE
PagesII 398 - II 401
ISBN (Print)978-1-4244-2807-6, 978-1-4244-2808-3 (CD)
DOIs
Publication statusPublished - 2008

Publication series

NameProceedings IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
PublisherIEEE
Volume2008
ISSN (Print)2153-6996
ISSN (Electronic)2153-7003

Keywords

  • ADLIB-ART-1603
  • WRS

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  • A vegetation correction methodology applied for soil moisture retrieval from C-band radar observations

    Joseph, A. T., van der Velde, R., O'Neill, P. E., Lang, R. & Gish, T., 2009, 2009 IEEE International Geoscience and Remote Sensing Symposium. Piscataway, NJ: IEEE, p. III 49 - III 52 (Proceedings IEEE International Geoscience and Remote Sensing Symposium (IGARSS); vol. 2009).

    Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

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