A good example includes those used in the search for radiations emitted by electromagnetic materials. Further, researchers also make use of Radio Telescope in investigating cosmos through installation of large antennas. There was some study in the middle of the 20th century on the possibility of using the microwave spectrum in this search. It was in the early 1960s that the first search using a 26-meter Radio Telescope was done. The interest was increased and the Soviet Union carried out SETI searches in the same period using omnidirectional antennas. The University of California, Berkeley, launched SETI Project in 1979 (Shuch 2011). After seven years (1986), second SETI efforts were done by UC Berkeley. Many advances have been made by this university. Last year, March 2014, UC Berkely started an all-sky survey, using the Arecibo Radio Telescope. It was in the early 1980s that Paul Horowitz, a physicist, proposed a spectrum analyzer. This would reach for SETI transmissions on narrow bands channels (Lamb 2001). Consequently, around 8.4 million channels were analyzed in the 1985 Project "META," which followed its observation in October 1995. .
In late 1970s, NASA SETI program was heavily criticized by members of the Congress. This led to its funding being withdrawn by the Congress, in 1981. However, this took only two years because in 1982, funding was restored. These events prompted formation of SETI League, Inc. in 1994, as a response to the cancellation of NASA SETI program by the Congress. The aim was to fund some projects such as pioneering of the backyard conversion of the satellite TV dishes. There have been several collaborations in recent years such as that of SETI Institute and Radio Astronomy at the UC Berkeley, in developing Radio Telescope Array for specialized SETI programs (Lamb 2001). .
SETI Projects have continued to progress despite criticism from some scientists who consider early studies as too euphoric.
