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Joseph Lade Pawsey (14 May 1908 30 November 1962) was an Australian scientist, radiophysicist and radio astronomer.
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Pawsey was born in rural Victoria (Australia) and graduated from the University of Melbourne in 1929 with his first degree in physics. He obtained a Ph. D degree in physics from the Cavendish Laboratory, University of Cambridge (UK) in 1934 having worked with J.A. Ratcliffe on ionosphere research. In 1939 he was one of the first scientific staff at the newly founded secret Radiophysics Laboratory in Sydney, Australia, working on radars that were to be used successfully in the Pacific war against the Japanese from 1941-1945. 
In 1944, Pawsey and Ruby Payne-Scott carried out the first radio astronomy observations in Australia, observing at 10 cm using a small antenna. Many of the concepts of the calibration of radio telescope systems were derived for the first time. In October 1945, Pawsey lead the first successful "solar noise" observations using an airforce radar antenna as a passive radio telescope. The following January, Pawsey and Payne-Scott carried out the first radio interferometry in radio astronomy, using the former Australian Army coastal radar at 200 MHz at Dover Heights Sydney. Fringes from the massive Type I bursts were detected, indicating a non-thermal origin for the time variable radio sources associated with a massive sunspot on 26 January 1946 (Australia Day). In the publication of these results the principles of aperture synthesis (called Fourier synthesis) were described for the first time. 
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Miller Goss colloquium: J. L. Pawsey (1908-1962) -- Father of Australian Radio Astronomy

In 1944, Pawsey and Ruby Payne-Scott carried out the first radio astronomy observations in Australia, observing at 10 cm using a small antenna. Many of the concepts of the calibration of radio telescope systems were derived for the first time. In October 1945, Pawsey lead the first successful "solar noise" observations using an airforce radar antenna as a passive radio telescope. The following January, Pawsey and Payne-Scott carried out the first radio interferometry in radio astronomy, using the former Australian Army coastal radar at 200 MHz at Dover Heights Sydney. Fringes from the massive Type I bursts were detected, indicating a non-thermal origin for the time variable radio sources associated with a massive sunspot on 26 January 1946 (Australia Day). In the publication of these results the principles of aperture synthesis (called Fourier synthesis) were described for the first time.
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Joseph Lade Pawsey (14 May 1908 - 30 November 1962) was an Australian scientist, radiophysicist and radio astronomer.
At the end of World War II he became a pioneer of the new science of radio astronomy, his interest being stirred by the discovery of radio waves from the Galaxy and by reports of intense interference in metre-wave radar receivers caused by disturbances on the Sun. To investigate the latter Pawsey, with Ruby Payne-Scott and Lindsay McCready, used an existing Royal Australian Air Force antenna at Collaroy, a northern Sydney suburb. In addition to confirming that the Sun was a source of radio noise their data also showed that the temperature in some regions of the Sun were as high as one million degrees. This temperature was far higher than was thought possible at the time. Work by the physicist David Forbes Martyn showed that temperatures peak in the Sun's corona at one million degrees. The observations with the Collaroy antenna not only marked the beginning of radio astronomy in Australia, but also the first time radio astronomy had provided important information on a problem in traditional optical astronomy.
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