The effect of radar configuration on effective correlation length

Liujun Zhu, Jeffrey P. Walker, Nan Ye, Christoph Rudiger

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

6 Citations (Scopus)


Soil moisture retrieval from Synthetic Aperture Radar (SAR) over bare soil using the Integral Equation Model (IEM) has not been fully operational for natural conditions, due mainly to the failure of roughness parameterization. Recently, increasing interest has been drawn to improve soil moisture retrieval accuracy of the IEM by introducing an effective correlation length leff. However, its behavior under different radar configurations has not been well studied using in-situ observations. This paper demonstrates the effect of radar configuration (polarization, incidence angle and frequency) on leff using the satellite SAR data available at multiple frequencies, together with coincident ground measurements collected during the SMAPEx-5 airborne field experiment. The results show i) different polarizations had the same leff values; ii) larger leff values were obtained from lower incidence angle observations over the same location, and iii) L-band tends to have larger leff values than C- and X-bands, whereas the C- and X-bands had similar leff values.

Original languageEnglish
Title of host publicationProceedings of the 2016 18th International Conference on Electromagnetics in Advanced Applications (ICEAA 2016)
Subtitle of host publicationCairns, Australia, 19-23 September 2016
Place of PublicationPiscataway NJ
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Electronic)9781467398114
ISBN (Print)9781467398121
Publication statusPublished - 2 Nov 2016
Event18th International Conference on Electromagnetics in Advanced Applications, ICEAA 2016 - Cairns, Australia
Duration: 19 Sept 201623 Sept 2016


Conference18th International Conference on Electromagnetics in Advanced Applications, ICEAA 2016

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