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.
In this letter, an attitude estimation method is presented for space targets by using an inverse synthetic aperture radar (ISAR) image sequence. The line structures, like the boundaries of planar payloads, are extracted from the ISAR image sequence and associated from frame to frame. With the accommodation of the radar looking angle information from the trajectory, the threedimensional attitude of...
The influence of the receiver position on imaging resolution of a passive radar system with multiple GNSS transmitters and a fixed ground receiver was analyzed. The spatial spectrum model is used to analyze the resolution properties of the system in accordance with the Fourier transform connection between the target scattering function and the echo in the spatial spectral domain, and the corresponding...
This paper presents a position correcting method concerning the existing problem in the forward approach to establish component-level parametric scattering center models for known complex radar targets. The forward approach decomposes the target-model of radar into some parts and then extracts the scattering centers and their parameters through radar simulation. In the actual utilization of the forward...
Modern multifunctional radars usually acquire limited and discontinuous wideband pulses of a target, which form sparse aperture (SA) observations. Inverse synthetic aperture radar (ISAR) imaging by exploiting these SA data is essential for multifunctional radars. Herein, we study the full-aperture (FA) reconstruction from SA measurements for SA-ISAR imaging of maneuvering targets. The FA reconstruction...
This paper proposes a novel azimuth scaling algorithm for estimating the relative rotation angle of two continual say sub-aperture inverse synthetic aperture radar (ISAR) images of a rigid space ISAR target by using a feature registration of coordinate locations of interested points extracted from the images above. Specifically, we firstly extract sufficient interested points and feature descriptor...
A novel motion compensation (MoCo) algorithm for high resolution (HR) spotlight SAR imagery is proposed. It is capable of correcting both phase error and range cell migration (RCM) in the post-PFA data domain. It is a robust way to estimate phase error by Map-drift (MD) method, including range-invariant and range-variant ones. What is more, the random characteristic of RCM is also taken into consideration...
A coherent backprojection based approach is presented for 3D shape estimation of small debris in space. The approach utilizes the fact that space debris is in high-speed spinning motion. Making use of the modulated range envelope and Doppler spreading, a backprojection maps the data into a three-dimensional parameter domain, and the spatial coordinates of scatterers can be extracted to reconstruct...
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.