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Since its inception 30 years ago perhaps no innovation in radar technology has made such a tremendous impact on the field as that of radar interferometry. Radar interferometry uses two or more observations separated in either time or space to measure fraction of a wavelength scale range differences between the two observations. Radar interferometry is used by scientific, commercial and government...
In this paper, the residue is extended to the second order, which is called second order residue. Second order residue is researched and applied in the interferometric synthetic aperture radar (SAR) phase unwrapping. Similar to the residue, the second order residue reflects the discontinuity in the wrapped phase. In phase unwrapping, the traditional residue is normally used to form the branch cut...
TanDEM-X is an innovative mission with a TerraSAR-X add-on satellite for high-resolution single-pass SAR interferometry. The TanDEM-X mission has the primary objective of generating a consistent, global DEM with an unprecedented accuracy according to the HRTI-3 specifications (2 m height accuracy, 12 m posting). Beyond that, TanDEM-X provides a configurable SAR interferometric platform for demonstrating...
Along track SAR interferometry (AT-InSAR) systems use more than one SAR antennas (typically two), mounted on the same platform and displaced along the platform moving direction. They are used to detect ground moving target. The information about the radial velocity of the moving target is estimated from the interferometric phase of the images. In this paper we show that exploiting not only the interferometric...
In this paper we consider the problem of the estimation of the digital elevation model (DEM) of a ground scene starting from dual baseline interferometric synthetic aperture radar (SAR) signals. classical maximum likelihood (ML) estimation techniques require the knowledge of the joint probability density function (PDF) of the two measured interferometric phases. Usually the joint PDF expression is...
In this paper a technique to conduct tomographic analyses of forested areas through multiple, coherent SAR images is presented. This technique differs from other methods existing in literature in that it may be regarded as a natural extension of SAR interferometry to the case where several distributed targets are present within the system resolution cell. In this way, it is possible to estimate the...
In a synthetic aperture radar (SAR) image of the ground, moving targets appear at locations different from their true instantaneous locations on the ground. In a corresponding interferometric phase image, all points on the ground nominally appear as a continuum of phase differences while the moving targets appear as discontinuities. By threshold comparisons within the intensity and the phase images,...
The introduction of a novel scanning technique, named terrain observation by progressive scan (TOPS) allows the improvement of the DTAR in multi swath radar images. The trade off between resolution in range and revisit time (the number of swaths) is very efficient. Some results of the modeling and simulation of this technique are discussed, as well as an application to ship traffic monitoring, revisiting...
NASApsilas long-term exploration goals include a return to manned missions to the Moon that will culminate in a permanent manned station on the Moon. Prior to embarking on such a mission, a series of precursor unmanned robotic missions are required to ascertain the best locations for manned exploration or a permanent lunar base. These precursor missions will consist of both orbital missions, such...
Multi-Dimensional (MultiD) SAR imaging is a recent technique, based on coherent SAR data combination, aimed to space (full-3D) and space deformation-velocity (4D) analysis. It is an extension of the concepts of SAR Interferometry and Differential Interferometry and offers new options for the analysis and monitoring of ground scenes. In this work, we discuss the current status and the results obtained...
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