Comparison of Different Dielectric Models to Estimate Penetration Depth of L- and S-Band SAR Signals into the Ground Surface

Abhilash Singh, M. Niranjannaik, Shashi Kumar and Kumar Gaurav ()
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Abhilash Singh: Fluvial Geomorphology and Remote Sensing Laboratory, Department of Earth and Environment Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
M. Niranjannaik: Fluvial Geomorphology and Remote Sensing Laboratory, Department of Earth and Environment Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
Shashi Kumar: Department of Photogrammetry and Remote Sensing, Indian Institute of Remote Sensing, ISRO, Dehradun 248001, Uttarakhand, India
Kumar Gaurav: Fluvial Geomorphology and Remote Sensing Laboratory, Department of Earth and Environment Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India

Geographies, 2022, vol. 2, issue 4, 1-9

Abstract: We evaluate the penetration depth of synthetic aperture radar (SAR) signals into the ground surface at different frequencies. We applied dielectric models (Dobson empirical, Hallikainen, and Dobson semi-empirical) on the ground surface composed of different soil types (sandy, loamy, and clayey). These models result in different penetration depths for the same set of sensors and soil properties. The Dobson semi-empirical model is more sensitive to the soil properties, followed by the Hallikainen and Dobson empirical models. We used the Dobson semi-empirical model to study the penetration depth of the upcoming NASA-ISRO synthetic aperture radar (NISAR) mission operated at the L-band (1.25 GHz) and the S-band (3.22 GHz) into the ground. We observed that depending upon the soil types, the penetration depth of the SAR signals ranges between 0 to 10 cm for the S-band and 0 to 25 cm for the L-band.

Keywords: dielectric models; penetration depth; soil moisture; NASA-ISRO SAR (NISAR) mission (search for similar items in EconPapers)
JEL-codes: Q1 Q15 Q5 Q53 Q54 Q56 Q57 (search for similar items in EconPapers)
Date: 2022
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