Word: signalization
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Dates: during 1960-1969
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That was the signal for administration aides to go frantically to work. At one point Deputy Attorney General Nicholas Katzenbach phoned Minnesota Republican Clark MacGregor, a member of the Judiciary Committee, and asked: "Do you know of anything we can do?" Replied MacGregor: "Of course I do. You can go get the Republican civil rights bills that you told us this summer you hadn't bothered to read, and you can look at what's in them and you can draw up a package containing what's in them and have the President say publicly...
...first observed to emit intense radio radiation in 1942. At the end of World War Two the advances in radio receivers were turned to peaceful studies of extra-terrestrial signals. Astronomical radio telescopes were set up to observe solar radio waves at fixed frequencies, recording changes in signal intensity...
...soon found that at some frequencies the solar signal remained quite steady, while in other areas of the radio spectrum the intensity might suddenly become a million times more powerful. These giant outbursts appeared to be associated with sunspots which could be seen on the sun's surface with optical telescopes. In 1949, J. P. Wild and L. L. McCready made the first sweep-frequency observations of the sun at Dapto, Australia, 20 miles south of Sydney. Instead of recording radiation at a single of fixed frequency, their receivers were able to record intensity at all frequencies from...
...straight line, synchronized so that as the receiver sweeps from higher to lower frequencies the spot seep from bottom to top of the screen. Thus the vertical displacement of the spot corresponds to frequency, and the intensity of the spot is made to vary with intensity of the solar signal at that frequency...
...together a theory for the general mechanism which causes giant explosions on the face of the sun--solar flares. The most important concept for analyzing the records is the fact that the frequency of a radio outburst corresponds to the height above the sun's surface emit high frequency signals; bases higher in the solar corona radiate at lower frequencies. Thus, a change in the frequency of a solar signal is caused by a change in the height of the emitting region. With this in mind four general types of solar outbursts have been distinguished...