operators. Technology Because the broadcasting antenna for Stratovision is usually hung beneath the aircraft ... miles 340 km . A Stratovision 25 kW transmitter operating from 30,000 feet 9 km ... receiving antenna up to 238 miles 383 km away from the aircraft. Early tests Stratovision tests ... that Stratovision would require only eight relay planes to provide a transcontinental network and six ... of Stratovision for Westinghouse said in his report The major technical problems of the system ... this application. Education by Stratovision In 1961 a nonprofit organization, Midwest Program on Airborne Television Instruction , commenced a Stratovision service from the airfield of Purdue University ... it became embroiled in legal action over their application of Stratovision in a controversy with the Westinghouse company. Propaganda by Stratovision Vietnam War During the war in Vietnam, the United States Navy also used Stratovision television technology when it flew Operation Blue Eagle from 1966 ... World Series of October 1965 Stratovision had also been used to bring the games to the troops. The aircraft ..., including Bosnia and Herzegovina Bosnia and Iraq . Pirate television by Stratovision In 1969 news ..., which would transmit commercial television programs to UK Britain by Stratovision. Although these stories ... service has ever operated by means of Stratovision. Stratovision a temporary service Today the Stratovision ... optic cable television systems and direct broadcast satellite services, Stratovision has become unnecessary ... more details
Cleanup date September 2008 Unreferenced date September 2008 The Midwest Program on Airborne Television Instruction MPATI was a special broadcasting initiative designed to broadcast educational television programming to schools, especially in areas where local educational television stations are either hard to receive or unavailable. From 1961 through 1968, MPATI s programming broadcast from two DC 6AB aircraft based at the Purdue University Airport in West Lafayette, Indiana , using a broadcasting technique known as Stratovision . The undertaking began as a three year experiment in 1960, with MPATI organizing, producing, and broadcasting instructional television with seed money from the Ford Foundation . This was a nonprofit organization of educators and television producers that pioneered instructional television for enriching education in public schools throughout the midwest. This was in times prior to the advent of satellite television transmission. By 1963, MPATI moved into its second phase where it relied totally on membership fees but it was never financially stable. MPATI found it difficult to get enough member schools to finance the organization. In its third reorganization, MPATI, unable to meet its expenses through membership fees, ceased producing and broadcasting courses in 1968 and became a tape library. One of the two aircraft would go aloft for six to eight hours at a time take up a twenty minute figure eight station centered over Montpelier, Indiana 35 miles north of Muncie, Indiana at an altitude of 23,000 feet. From this position the range of transmission was approximately 200 miles in diameter stations transmission included both Chicago and Detroit metropolitan areas. When on station the plane would reduce speed, and then lower a forty foot antenna mast which was gyroscopically stabilized so that the antenna always aligned from the aircraft to the center of the earth. This stabilization feature helped to maintain polarization of the signals from ... more details
Channel 72 has been removed from television use in 1983 , but was formerly used by television stations in North America which broadcast on UHF frequencies NA TV Freq 72 MHz. In the United States , channels Channel 70 70 Channel 83 83 served primarily as a translator band containing broadcast translator repeater transmitters to fill gaps in coverage for existing stations The Midwest Program on Airborne Television Instruction MPATI had used UHF channel 76 channels 72 and 76 KS2XGA and KS2XGD, respectively on an experimental basis in stratovision stratocasting operation from 1961 1967. ref radiodxer.bravehost.com MPATI.html RadioDXer on MPATI ref The costs involved ultimately proved prohibitive. ref http www.chicagotelevision.com MPATI.htm Chicago Television MPATI Bot generated title ref KAME TV MyNetworkTV MyTV Reno, Nevada Reno rebroadcaster K72AA Yerington, Nevada , formerly on channel 72, was moved to K06KC channel 6. ref http www.w9wi.com articles gt69.html obsolete Stations above channel 69 . ref KENS TV CBS San Antonio, Texas San Antonio rebroadcaster K72DN Leakey, Texas moved to K45FL channel 45. KFDA TV CBS Amarillo, Texas Amarillo rebroadcaster K72CB Canadian, Texas was moved to K33CQ channel 33. KIRO TV CBS Seattle rebroadcaster K72CI Everett, Washington moved to K58BW channel 58. KVBC TV NBC Las Vegas, Nevada Las Vegas rebroadcaster K72AE Needles, California was moved to K30BQ channel 30. KOIN CBS Portland, Oregon Portland rebroadcaster K72AB K72AY Maupin, Oregon moved to K56CD channel 56. KOLO TV American Broadcasting Company ABC Reno, Nevada Reno rebroadcaster K72AF Battle Mountain, Nevada moved to K13JD channel 13. KPAZ TV Trinity Broadcasting Network TBN Phoenix, Arizona Phoenix rebroadcaster K72CK Globe, Arizona was moved to K41ER channel 41. KREM TV CBS Spokane, Washington Spokane rebroadcaster K72AI Libby, Montana moved to K62DL channel 62. KUED TV PBS Salt Lake City, Utah Salt Lake City rebroadcasters K72CM Helper, Utah and K72AQ Delta, Utah were mo ... more details
Channel 76 has been removed from television use in 1983 , but was formerly used by television stations in North America which broadcast on UHF frequencies NA TV Freq 76 MHz. In the United States , channels Channel 70 70 Channel 83 83 were rarely used and served primarily as a translator band containing low power broadcast translator repeater transmitters to fill gaps in coverage for existing stations. Many are defunct the rest have moved to other frequencies The Midwest Program on Airborne Television Instruction MPATI had used UHF channel 72 channels 72 and 76 KS2XGA and KS2XGD, respectively on an experimental basis in stratovision stratocasting operation from 1961 1967 . The project was abandoned as the cost was prohibitive. ref http www.chicagotelevision.com MPATI.htm Chicago Television MPATI . ref CBLFT Radio Canada rebroadcaster CBLFT 8 Kitchener, Ontario moved to channel 61 in 1983. KCBS TV CBS Los Angeles, California Los Angeles rebroadcaster K76AJ 29 Palms, California moved to K49DC channel 49. ref http www.w9wi.com articles gt69.html obsolete Stations above channel 69 . ref KTVX TV American Broadcasting Company ABC Salt Lake City, Utah Salt Lake City rebroadcaster K76CI Price, Utah moved to K04IW channel 4 . KEZI American Broadcasting Company ABC Eugene, Oregon Eugene rebroadcaster K76AY Florence, Oregon was moved to K56DL channel 56. KGW TV NBC Portland, Oregon Portland rebroadcaster K76AM Tillamook, Oregon moved to K40EG channel 40. KHQ TV NBC Spokane, Washington Spokane rebroadcaster K76AH Lewiston, Idaho moved to K35BW channel 35. KOAT TV American Broadcasting Company ABC Albuquerque, New Mexico Albuquerque rebroadcasters K76AS Tucumcari, New Mexico and K76BE Truth or Consequences, New Mexico have been moved to K42CR channel 42 and K64CG channel 64. KOLO TV American Broadcasting Company ABC Reno, Nevada Reno rebroadcaster K76AB Winnemucca, Nevada moved to K47CH channel 47. KPTV TV Fox TV Fox Portland, Oregon Portland rebroadcasters K76AA Prineville, Oreg ... more details
POV date January 2010 Refimprove date January 2010 Terrestrial television is a mode of television broadcasting which does not involve satellite transmission or cable television cable s typically using radio waves through transmitting and receiving Antenna radio antennas or aerials. The term is more common in Europe, while in the United States it is referred to as broadcast television or sometimes over the air television . Terrestrial television broadcasting dates back to the very beginnings of television as a medium itself with the first long distance public television broadcast from Washington, D.C. , on April 7, 1927. The BBC began broadcasting television to the public in 1929, and had a regular schedule of programmes in 1930. Aside from transmission by high flying planes moving in a loop using a system developed by Westinghouse Electric Corporation Westinghouse called Stratovision , there was virtually no other method of television delivery until the 1950s with the beginnings of cable television , or community antenna television CATV . The first non terrestrial method of delivering television signals that in no way depended on a signal originating from a traditional terrestrial source began with the use of communications satellite s during the 1960s and 1970s. Europe In Europe, a planning conference ST61 held under the auspices of the International Telecommunications Union in Stockholm in 1961 allocated frequencies the Bands IV and V for the first time for broadcast television use. It also superseded the 1951 Plan also made in Stockholm which had first allocated Band II frequencies for FM radio and Band III frequencies for television. Following the ST61 conference, UHF frequencies were first used in the United Kingdom UK in 1964 with the introduction of BBC Two BBC2 . In UK, VHF channels were kept on the old 405 line system, while UHF was used solely for 625 line broadcasts which later used PAL colour . Television broadcasting in the 405 line system continued aft ... more details
employed as flying television transmitters for the Stratovision company. The type was finally retired ... under the name of Stratovision . File Boeing WB 29A 53 WRS 1954.jpg thumb right WB 29A of 53 Weather ... more details
Encyclopedia
top
