the experimental Leningrad TV Center (OLTC) was put in action. OLTC worked with 240 lines at 25 fps progressive scan. In Moscow, experimental transmissions of electronic television took place on March 9, 1937, using equipment manufactured by RCA. Regular broadcasting began on December 31, 1938. It was quickly realized that 343 lines of resolution offered by this format would have become insufficient in the long run, thus a specification for 441-line format at 25 fps interlaced was developed in 1940. Television broadcasts were suspended during Great Patriotic War. In 1944, while the war was still raging, a new standard, offering 625 lines of vertical resolution was prepared. This format was ultimately accepted as a national standard. The transmissions in 625-line format started in Moscow on November 4, 1948. Regular broadcasting began on June 16, 1949. Details for this standard were formalized in 1955 specification called GOST 7845-55, basic parameters for black-and-white television broadcast. In particular, frame size was set to 625 lines, frame rate to 25 frames/s interlaced, and video bandwidth to 6 MHz. These basic parameters were accepted by most countries having 50 Hz mains frequency and became the foundation of television systems presently known as PAL and SECAM. Starting in 1951, broadcasting in the 625-line standard was introduced in other major cities of the Soviet Union. Color television broadcast started in 1967, using SECAM color system. Turkey The first Turkish television channel, ITU TV, was launched in 1952. The first national television is TRT 1 and was launched in 1964. Color television was introduced in 1981. Before 1989 there was the only channel, the state broadcasting company TRT, and it broadcast in several times of the dateline. Turkey's first private television channel Star started it broadcast on 26 May 1989. Until then there was only one television channel controlled by the state, but with the wave of liberalization, privately owned broadcasting began. Turkey's television market is defined by a handful of big channels, led by Kanal D, ATV and Show, with 14%, 10% and 9.6% market share, respectively. The most important reception platforms are terrestrial and satellite, with almost 50% of homes using satellite (of these 15% were pay services) at the end of 2009. Three services dominate the multi-channel market: the satellite platforms Digitürk and D-Smart and the cable TV service Türksat. United Kingdom The first British television broadcast was made by Baird Television's electromechanical system over