Advanced search
1 file | 5.37 MB

Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles

(2009) SENSORS. 9(2). p.1067-1093
Author
Organization
Abstract
In the past decades, many studies on soil moisture retrieval from SAR demonstrated a poor correlation between the top layer soil moisture content and observed backscatter coefficients, which mainly has been attributed to difficulties involved in the parameterization of surface roughness. The present paper describes a theoretical study, performed on synthetical surface profiles, which investigates how errors on roughness parameters are introduced by standard measurement techniques, and how they will propagate through the commonly used Integral Equation Model (IEM) into a corresponding soil moisture retrieval error for some of the currently most used SAR configurations. Key aspects influencing the error on the roughness parameterization and consequently on soil moisture retrieval are: the length of the surface profile, the number of profile measurements, the horizontal and vertical accuracy of profile measurements and the removal of trends along profiles. Moreover, it is found that soil moisture retrieval with C-band configuration generally is less sensitive to inaccuracies in roughness parameterization than retrieval with L-band configuration.
Keywords
soil roughness parameterization, soil moisture, SAR, MICROWAVE DIELECTRIC BEHAVIOR, APERTURE RADAR, BARE SOIL, MULTI-INCIDENCE, WET SOIL, SAR DATA, RETRIEVAL, MODELS, BACKSCATTERING, SCATTERING

Downloads

  • Lievens 2009 Sensors 9 2 1067.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 5.37 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Lievens, Hans, Hilde Vernieuwe, Jesus Alvarez-Mozos, Bernard De Baets, and Niko Verhoest. 2009. “Error in Radar-derived Soil Moisture Due to Roughness Parameterization: An Analysis Based on Synthetical Surface Profiles.” Sensors 9 (2): 1067–1093.
APA
Lievens, H., Vernieuwe, H., Alvarez-Mozos, J., De Baets, B., & Verhoest, N. (2009). Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles. SENSORS, 9(2), 1067–1093.
Vancouver
1.
Lievens H, Vernieuwe H, Alvarez-Mozos J, De Baets B, Verhoest N. Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles. SENSORS. 2009;9(2):1067–93.
MLA
Lievens, Hans et al. “Error in Radar-derived Soil Moisture Due to Roughness Parameterization: An Analysis Based on Synthetical Surface Profiles.” SENSORS 9.2 (2009): 1067–1093. Print.
@article{693843,
  abstract     = {In the past decades, many studies on soil moisture retrieval from SAR demonstrated a poor correlation between the top layer soil moisture content and observed backscatter coefficients, which mainly has been attributed to difficulties involved in the parameterization of surface roughness. The present paper describes a theoretical study, performed on synthetical surface profiles, which investigates how errors on roughness parameters are introduced by standard measurement techniques, and how they will propagate through the commonly used Integral Equation Model (IEM) into a corresponding soil moisture retrieval error for some of the currently most used SAR configurations. Key aspects influencing the error on the roughness parameterization and consequently on soil moisture retrieval are: the length of the surface profile, the number of profile measurements, the horizontal and vertical accuracy of profile measurements and the removal of trends along profiles. Moreover, it is found that soil moisture retrieval with C-band configuration generally is less sensitive to inaccuracies in roughness parameterization than retrieval with L-band configuration.},
  author       = {Lievens, Hans and Vernieuwe, Hilde and Alvarez-Mozos, Jesus and De Baets, Bernard and Verhoest, Niko},
  issn         = {1424-8220},
  journal      = {SENSORS},
  language     = {eng},
  number       = {2},
  pages        = {1067--1093},
  title        = {Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles},
  url          = {http://dx.doi.org/10.3390/s90201067},
  volume       = {9},
  year         = {2009},
}

Altmetric
View in Altmetric
Web of Science
Times cited: