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Learn radio interferometry principles and imaging techniques in this 40-minute lecture delivered as part of the Fast Radio Transient Sky (FTSky) 2025 program at the International Centre for Theoretical Sciences. Explore the fundamental concepts behind radio interferometers and their application in astronomical imaging, with particular focus on techniques relevant to fast radio transient detection and localization. Discover how multiple radio telescopes work together to create high-resolution images of the sky, understand the mathematical foundations of interferometric imaging, and examine practical considerations for processing interferometric data. Master the principles of aperture synthesis, beam formation, and image reconstruction techniques essential for modern radio astronomy. Gain insights into how these imaging methods are applied to study fast radio bursts, rotating radio transients, and other transient phenomena across both galactic and cosmological distances. This lecture forms part of a comprehensive training program designed to equip the next generation of time-domain astronomers with essential skills for multi-wavelength fast transient studies.
