Abstract
Dunes (such as linear dunes oriented in a constant direction), their size, and interdune spacing are very regular in the deserts. Therefore, they manifest a periodic pattern in terms of spatial distribution. There are several modulation transfer functions between SAR images and the actual periodic surface parameters, and the image brightness is sensitive to the local incidence angle. According to previous studies, a linear mapping process can describe these modulation processes. This study proposes an algorithm for estimating the linear dune features including linear dune direction (the prevailing wind direction), interdune spacing, and rms slope and dune height from SAR images. To estimate rms slope, two algorithms were developed, a local incidence angle method and a modulation transfer function method. The linear dune height was then calculated based on the rms slope of the surface. Finally, the obtained results were compared with the truth data from field investigations. The estimated physical quantities did not completely agree with the truth data, and possible error sources are discussed.
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.
