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Radio-Frequency Energy from the Sun


RADIO-FREQUENCY radiation in the ten-metre range of wave-lengths which appeared to originate in the region of the Milky Way was reported by Jansky1 in 1933. He observed no measurable effect from the sun, despite the fact that its thermal radiation immensely exceeds the total from all other stars, and deduced that this 'cosmic static' originated in interstellar space. Later observers, Reber2 (2 metres), English Army observers3 (5 metres) and Royal New Zealand Air Force radar personnel4 (1.5 metres), have since reported small or large effects from the sun itself.

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  1. Jansky, Proc. Inst. Radio Eng., 21, 1387 (1933).

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  2. Reber, Astrophys. J., 279 (Nov. 1944).

  3. Army Operational Research Group (British). Report No. 275. (Restricted report.)

  4. Alexander, Radio Development Laboratory Report No. RD. 1/518. (D.S.I.R., New Zealand.) (Restricted report.)

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PAWSEY, J., PAYNE-SOOTT, R. & McCREADY, L. Radio-Frequency Energy from the Sun. Nature 157, 158–159 (1946).

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