Sea ice and snow thickness retrieval using correlation function in VHF radar

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Summary

In this project, we develop models for electromagnetic wave propagation through multi-layer sea ice media.  Based on the models, we calculate the angular and frequency correlation function (ACF/FCF) of the backscattered waves at the desired frequencies and angles.  The characteristics of the ACF/FCF are investigated, leading to the retrieval of sea ice thickness and snow-cover characteristics.  We develop a model for VHF which will be used to investigate sea ice and we study a model for higher frequency (C, Ku, K band) that can be applied to snow-cover characteristics.  We also perform proof-of-concept experiment on retrieval of material thickness based on this ACF/FCF method. 

Concept of ACF/FCF VHF sensors                          Multi-layer model

Experimental set up schematic and photo

Related publications

• S. Jaruwatanadilok, R. S. Eriksen , and Y. Kuga, "Medium Thickness Estimation Technique Based on Angular-Frequency Correlation Function,"  submitted for publication in IEEE Transactions on Antennas and Propagation, 2006.
• S. Jaruwatanadilok, Y. Kuga, A. Ishimaru, and Z. Hussien, "Snow Sensing Based on Two-Frequency Radiative Transfer Theory," URSI - APS, Washington, DC, July 3-8, 2005.
• R. Eriksen, Y. Kuga,  S. Jaruwatanadilok, and A. Ishimaru, "Experimental verification of the medium thickness estimation technique based on frequency- and angular-correlation functions," URSI - APS, Washington, DC, July 3-8, 2005.
• S. Jaruwatanadilok, A. Ishimaru,  and Y. Kuga, "Snow thickness estimation using correlation function at C-band," IGARSS, Anchorage, AK, September 20-24 2004.
• Z. Hussein, Y. Kuga, A. Ishimaru, S. Jaruwatanadilok, and K. Pak, "Angular and frequency correlation for sea-ice thickness retrieval," IGARSS, Anchorage, AK, September 20-24 2004.

Sponsored by Jet Propulsion Laboratory