The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The initial altitude error (IAE) of high-speed diving vehicle can be as large as several kilometers, which results in serious defocus, position shift and geometry distortion for synthetic aperture radar image. In this paper, a novel IAE estimation method based on the principle of autofocus is proposed. The genetic algorithm (GA) is applied to solve the optimization model with advantages of global...
The autofocus backprojection (BP) algorithm based on image sharpness metric has obtained excellent performance for motion error compensation. However, there are still two serious problems should be considered. Firstly, the spatial variance of motion errors is ignored, which can result in azimuth defocus for targets far away from the invisible reference target. Secondly, the use of redundant antenna...
The back projection (BP) algorithm is an accurate time-domain imaging method for synthetic aperture radar. However, the influences of wind field and turbulence on the platform make the antenna phase centers (APCs) greatly deviate from the designed linear trajectory and degrade the BP performance. Although the inertial measurement unit can be used to measure the trajectory, the measurement error still...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.