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A Brief History of Microwaves
Published in Iain H. Woodhouse, Introduction to Microwave Remote Sensing, 2006
An important development in 1952 was the technique of “Doppler beam sharpening” developed by Carl Wiley of the Goodyear Aircraft Corporation as a means of improving the spatial resolution of long wavelength imaging radar. The longer wavelengths required unfeasibly larger antennas to achieve the same spatial resolution, so Wiley developed a means of using the Doppler shift in the echoes to achieve a much higher resolution. This technique is now referred to as aperture synthesis, as it allows a small antenna to achieve the effective resolution of a much larger, synthesised antenna (or aperture). Aperture Synthesis
Light, Waves, and Rays
Published in Vincent Toal, Introduction to Holography, 2011
A second method called aperture synthesis [7] is used extensively in radio astronomy and radar. The basic principle is that a large hologram may be assembled from a set of holograms from a number of CCD arrays whose locations in the x',y' plane are known very precisely. Alternatively, a single CCD array may be used to record holograms in various precisely known and specified locations in the plane. One could, in principle, record as large a hologram as required.
All About Wave Equations
Published in Bahman Zohuri, Patrick J. McDaniel, Electrical Brain Stimulation for the Treatment of Neurological Disorders, 2019
Bahman Zohuri, Patrick J. McDaniel
An astronomical interferometer achieves high-resolution observations using the technique of aperture synthesis, mixing signals from a cluster of comparatively small telescopes rather than a single very expensive monolithic telescope
Application of the SBAS-DInSAR technique for deformation monitoring in Tunis City and Mornag plain
Published in Geomatics, Natural Hazards and Risk, 2020
Anis Chaabani, Benoit Deffontaines
Indeed, the SBAS approach makes it possible to identify and follow the temporal evolution of the earth deformation with a high degree of spatial and temporal coverage. In particular, this technique is based on the utilization of a large number of SLC (single look complex) radar images based on the principle of SAR aperture synthesis and implements an easy combination of differential interferograms. This process makes it possible to obtain from multiple unwrapped interferograms, displacement time series and velocity maps.