Abstract
In passive microwave remote sensing, the change of ocean emissivity is very small due to the roughness and salinity change, particularly for the polar region. This puts forward a strict requirement of the simulation accuracy. The ultra-wideband software-defined microwave radiometer (UWBRAD) is developed to measure the ocean salinity over polar region using wide-frequency microwave from 0.5 GHz to 2 GHz. In this paper, in order to meet the high accuracy requirement for sea surface salinity detection with UWBRAD, the Nystrom method is used in solving surface integral equations with moment method (MoM). A neighborhood impedance boundary condition (NIBC) technique is also applied to solve the matrix equation efficiently. Moreover, to save the memory and further accelerate the calculation speed, the sparse matrix canonical grid (SMCG) method is firstly combined with Nystrom/NIBC. Simulation results are illustrated for 0.5-2 GHz and show that emissivities using Nystrom/NIBC combined with SMCG are accurate to the magnitude of 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-4</sup> , which meet the accuracy requirement of retrieving polar ocean salinity within 0.2 psu.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
