WCSP-FM, also known as C-SPAN Radio, is a radio station owned by the Cable-Satellite Public Affairs Network (C-SPAN) in Washington, D.C. The station is licensed to C-SPAN's corporate owner, the National Cable Satellite Corporation, and broadcasts on 90.1 MHz 24 hours a day. Its studios are located near Capitol Hill in C-SPAN’s headquarters. In addition to WCSP-FM, C-SPAN Radio programming is also available online at c-span.org and via satellite radio on SiriusXM channel 455. WCSP-FM broadcasts in the HD (digital) format. Prior to C-SPAN's acquisition of the 90.1 frequency in 1997, the station operated as WGTB-FM, the student radio station of Georgetown University, from 1960 to 1979. Increasingly contentious relations between students and university administration led Georgetown to sell the license to the University of the District of Columbia, which operated a jazz-format station as WDCU from 1982 to 1997. History WGTB at Georgetown University On May 25, 1960, Georgetown University received a construction permit to build a new noncommercial radio station which would operate with 771 watts on 90.1 MHz, a move five years in the planning. WGTB had operated since 1946 as a carrier current station, but new buildings on the Georgetown campus were not being equipped to radiate the station. At the time of WGTB's debut on FM, programming included discussions on issues, taped programs from other colleges, Georgetown sports, and "every kind of music with the exception of rock and roll". Like many campus stations of its day, WGTB only broadcast during the school year. Carrier current broadcasts were discontinued in 1963, citing poor performance and high costs. Few people outside the campus listened; a 1968 survey showed that WGTB had the second-lowest FM listenership in Washington, only ahead of WAMU at American University. As the 1960s became the 1970s, WGTB-FM transformed from a small educational outlet into a much more powerful station with a defined format. The station went to 24-hour broadcasting by February 1970; that June, the Federal Communications Commission approved a major power increase for the station, to 14,720 watts. Both changes in format and technical parameters brought growing pains, however. The station's new progressive rock format, eliminating all block programming, made it a bastion of liberalism on a rather conservative campus. In late 1970, Rev. Francis Heyden, former WGTB faculty moderator, leveled charges at the station that it had failed to conform to its approved format, played "indecent and anti-Semitic" records, and