sferics การใช้

• Those waves cause three of the most commonly heard radio noises : sferics ( short for atmospherics ), tweeks and whistlers.
• Beside atomic physics Betz searched on Sferics, where he leads a science-group on the Munich Ludwig-Maximilians-University.
• Sferics may propagate from their lightning source without major attenuation in the Earth-Ionosphere waveguide, and can be received thousands of kilometers from their source.
• The radio signals from a lightning strike are often called " sferics . " Like all other radio waves, they travel approximately at the speed of light.
• The dispersion characteristics of the Earth-ionospheric waveguide can be used for locating thunderstorm activity by measurements of the difference of the group time delay of lightning signals ( sferics ) at adjacent frequencies up to distances of 10000 km.
• These are the sferics, which can be followed by a tweek, a clear falling tone like a bird chirp less than one second long that is caused by a radio signal traveling through, and being dispersed by, the ionosphere.
• Sunspot activity is projected to be at a peak over the next few years, signaling an increase in magnetic storms and a prime time for radio explorers in search of sferics, whistlers, tweeks and chorus, as these sounds have been classified.
• For smaller aircraft, especially in general aviation, there are two main brands of lightning detectors ( often referred to as sferics, short for radio atmospherics ) : " Stormscope ", produced originally by Ryan ( later B . F . Goodrich ) and currently by L-3 Communications, and the " Strikefinder ", produced by Insight.
• Besides its appearance in rock and jazz music, the EBow also made its way in the domain of contemporary art music, being used by John Cage in his harp piece " A Postcard from Heaven " ( 1982 ), Karlheinz Essl in " Sequitur VIII " ( 2008 ) for electric guitar and live-electronics, Elliott Sharp on " SFERICS " ( 1996 ), Arnold Dreyblatt in " E-Bow Blues " ( 1998 ) and David First in " A Bet on Transcendence Favors the House " ( 2008 ).