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1962•Australian Journal of PhysicsOpen access

Wide?Band Bursts of V.L.F. Radio Noise (Hiss) at Hobart

R. L. DOWDEN

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Abstract

Wide-band bursts of radio noise from the upper ionosphere or exosphere have been observed at frequencies from 100 cIs to 250 kc/s. The observed intensity [Wm-2 (C/S)-I] ranges from nearly 10-9 at 100 cIs to 10-19 at 250 kc/s. However, the intensity at the source (above the ionosphere), deduced by subtracting the losses suffered in the ionosphere and below the ionosphere, shows a relatively flat spectrum at a level of the order of 10-10 Wm-2 (C/S)-I.

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Wide-band bursts of radio noise from the upper ionosphere or exosphere have been observed at frequencies from 100 cIs to 250 kc/s. The observed intensity [Wm-2 (C/S)-I] ranges from nearly 10-9 at 100 cIs to 10-19 at 250 kc/s. However, the intensity at the source (above the ionosphere), deduced by subtracting the losses suffered in the ionosphere and below the ionosphere, shows a relatively flat spectrum at a level of the order of 10-10 Wm-2 (C/S)-I.

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Available abstract

Wide-band bursts of radio noise from the upper ionosphere or exosphere have been observed at frequencies from 100 cIs to 250 kc/s. The observed intensity [Wm-2 (C/S)-I] ranges from nearly 10-9 at 100 cIs to 10-19 at 250 kc/s. However, the intensity at the source (above the ionosphere), deduced by subtracting the losses suffered in the ionosphere and below the ionosphere, shows a relatively flat spectrum at a level of the order of 10-10 Wm-2 (C/S)-I.

Key concepts: Ionosphere, Hiss, Physics, Noise (video), Radio spectrum, Intensity (physics), Astrophysics, Whistler

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