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http://www.nrao.edu/vla/html/rfa.htm Radio frequency bandwidth for astronomy.
http://astrosun.tn.cornell.edu/faculty/haynes/asat/rfi.html The cosmic radio signals that astronomers try to detect from distant stars and galaxies are typically billions of times weaker than radio stations.
http://www.windows.umich.edu/spaceweather/wave_modulation.html Radio waves travel at 186,000 miles per second through air compared to sound waves which travel at only 1/5 of a mile per second.
http://www.arches.uga.edu/~klopfens/broadcastfuture.html Understanding the future of broadcasting gives examples from history.
http://www.nrao.edu/introduction A starting point for some basic facts about radio astronomy, what radio astronomers do, how radio telescopes work and the kinds of research is done and site includes FAQ section.
http://setiathome.ssl.berkeley.edu/rfi Radio frequency interference from SETI@home is an exciting Internet project which uses a simple screensaver program to search for radio signals from extraterrestrial life by using the power of distributed processing.
http://www.adec.edu/tag/spectrum.html Radio frequency bandwidth from the Allocated Radio Spectrum is located between 9 KHz and 300 GHz Bandwidth.
http://www.nrao.edu/vla/html/rfa.htm Radio frequency bandwidth for astronomy.
http://astrosun.tn.cornell.edu/faculty/haynes/asat/rfi.html The cosmic radio signals that astronomers try to detect from distant stars and galaxies are typically billions of times weaker than radio stations.
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