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Titlebook: Low Frequency Astrophysics from Space; Proceedings of an In Namir E. Kassim,Kurt W. Weiler Conference proceedings 1990 Springer-Verlag Berl

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51#
發(fā)表于 2025-3-30 10:18:45 | 只看該作者
52#
發(fā)表于 2025-3-30 16:04:51 | 只看該作者
53#
發(fā)表于 2025-3-30 19:12:55 | 只看該作者
Some problems in low frequency solar radio physics,the problem of ionospheric refraction does not exist. Noise storms are believed to occur in closed magnetic loops due to trapped superthermal particles. Recent radioheliograph observations suggest such a magnetic field topology up to altitudes of about 40 MHz emission. The problem of relative locati
54#
發(fā)表于 2025-3-30 23:04:07 | 只看該作者
,Low frequency propagation in the Earth’s magnetosphere, least 2.5R. under conditions of solar maximum. Successful imaging from within the plasmasphere may depend upon the feasibility of correction schemes..Clearly, much more extensive calculations are required, particularly for large radii, both propagation modes, and over a wide range of zenith angles.
55#
發(fā)表于 2025-3-31 01:46:15 | 只看該作者
The low density ionized component of the interstellar medium and free-free absorption at high galaccomponent of the interstellar medium, having a surface density approximately one third that of the H I, a scale height ten times that of the cloud layer, and a power requirement comparable to that available from supernovae. While the origin of this gas is not yet understood, its existence clearly ha
56#
發(fā)表于 2025-3-31 07:17:14 | 只看該作者
Supernovae and supernova remnants at low frequencies,ange can be very useful. An example of a peculiarity at low frequencies is the 38 MHz “flare” observed from Cas A in the mid-1970‘s. Such events could provide the key to understanding the radio emission from a remnant like Cas A..The radio emission from supernovae is so strongly free-free absorbed b
57#
發(fā)表于 2025-3-31 13:08:29 | 只看該作者
,Low frequency propagation in the Earth’s magnetosphere, applied to the solar wind. It is of course recognized that scattering by irregularities will broaden compact sources and ultimately limit the resolution (Dennison and Booth 1987; Spangler 1990). In addition however, large-scale interplanetary refraction and the resulting distortion needs to be evaluated.
58#
發(fā)表于 2025-3-31 16:03:07 | 只看該作者
59#
發(fā)表于 2025-3-31 20:26:41 | 只看該作者
0075-8450 ical need for and possible instrumentation for implementing ground-based, ground-to-space, space-based, and lunar-based observations. The papers cover a wide range of topics such as solar astronomy, planetary science, supernova remnants, pulsars, interstellar thermal material, interstellar plasma re
60#
發(fā)表于 2025-3-31 23:19:19 | 只看該作者
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