Synthetic Aperture Radar (SAR) imaging techniques have evolved to become a cornerstone in remote sensing, offering the ability to capture high-resolution images regardless of weather or lighting ...

The H2S radom (antenna covering, above) and antenna (below). Ground mapping (or imaging the ground terrain) using microwave radar was done routinely in the Second World War by the Royal Air Force for ...

Fundamental diffraction physics says that a larger aperture improves both resolution and penetration. However, aperture size has historically been limited by system complexity and unknown benefit in ...

Synthetic aperture radar is a remarkable imaging technique that produces high-resolution 2-D and 3-D pictures from radar reflections. Because it relies on radio or microwaves rather than visible light ...

Engineers at Rice and Northwestern universities in the US say that they have built a prototype lens-free camera capable of high-resolution imaging in the visible range. Similar in principle to the ...

Scientists have unveiled a new way to capture ultra-sharp optical images without lenses or painstaking alignment. The approach uses multiple sensors to collect raw light patterns independently, then ...