Effect of incorrect sound velocity on synthetic aperture sonar resolution
نویسندگان
چکیده
منابع مشابه
Effect of Multipath on Synthetic Aperture Sonar
Abstract The performance of real or synthetic aperture sonar (SAS) in shallow waters is degraded by multipath, which leads to ghost targets and reduced image contrast. This loss of image contrast fills in acoustic shadows and is therefore an important limitation for high resolution SAS applications such as minehunting, where target recognition exploits the shape and size of the shadow in additi...
متن کاملInterferometric Synthetic Aperture Sonar
Interferometric Synthetic Aperture Sonar (ISAS) offers the possibility of high resolution, three-dimensional images of objects on the ocean floor. The height of objects is identified from the phase difference between two synthetic aperture images of the object obtained using two receivers separated by a short distance. A central problem is the need to unwrap the phase difference in the presence...
متن کاملMotion Compensation for High-resolution Synthetic-aperture Sonar Imaging
This paper presents a motion estimation and correction technique for the realization of synthetic-aperture sonar imaging. It utilizes the redundancy provided by the multiple-element receiver array and physical-array sub-images are used for the estimate the motion errors between adjacent receiver positions in the form of phase errors. Subsequently, motion errors can be corrected accordingly by m...
متن کاملMotion Compensation in High Resolution Synthetic Aperture Sonar (SAS) Images
The sequence of echoes detected by an active Synthetic Aperture Sonar (SAS) is coherently added in an appropriate way to produce an image with greatly enhanced resolution in the azimuth, or along-track direction when compared with an image obtained from a standard Side Looking Sonar (SLS). The SAS processing originates from the Synthetic Aperture Radar (SAR) concept. A complete introduction to ...
متن کاملIncoherent Synthetic Aperture Sonar Processing
This chapter investigates the incoherent approach applied in synthetic aperture sonar processing. The details of implementation are shown, and the technical properties of this technique are presented. Simulations are presented along the way for purposes of illustrations and comparisons. Discussions of the potential and limitation of this approach are made. All the simulations and analytical inv...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: MATEC Web of Conferences
سال: 2019
ISSN: 2261-236X
DOI: 10.1051/matecconf/201928304013