= Martin Ryle
{c}
{title2=1918-1984}
{wiki}
= M. Ryle
{c}
{synonym}
= Sir Martin Ryle
{c}
{synonym}
<Martin Ryle> developed <aperture synthesis> in <radio astronomy>. Signals from separated antennas provide spatial information at different baselines; combining those measurements reconstructs source structure with resolving power associated with a much larger aperture.
Earth rotation changes the projected baseline geometry, increasing the available spatial samples. Ryle's Nobel lecture explains how this principle and its instrumental realization made high-resolution radio imaging possible without filling the entire effective aperture with collecting material.<Radio Telescopes of Large Resolving Power by Martin Ryle>[Nobel lecture: interferometry, aperture synthesis and rotation synthesis]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Martin%20Ryle%20%28cropped%29.jpg?width=250]
{title=Portrait of <Martin Ryle>}
{description=Woodruff T. Sullivan III; NRAO/AUI Archives, Sullivan Collection; rights NRAO/AUI/NSF. https://creativecommons.org/licenses/by/4.0/[CC BY 4.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Martin_Ryle_(cropped).jpg}
{width=250}
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