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Chayka ((ロシア語:Чайка), lit. "seagull") is a Russian terrestrial radio navigation system, similar to LORAN-C. It operates on similar frequencies around 100 kHz, and uses the same techniques of comparing both the envelope and the signal phase to accurately determine location. The systems differ primarily in details. ==Chayka-Chains== Chayka, like LORAN-C, uses different pulse repetition frequencies (GRIs) to allow the identification of different stations operating on the same frequencies. There are 5 Chayka chains in use: *GRI 8000 — Western (European) Russia Chayka Chain (1969, RSDN-3/10) *GRI 7950 — Eastern Russia Chayka Chain (1986, RSDN-4) *GRI 5980 — Russian-American Chayka Chain (1995) *GRI 5960 — Northern Chayka Chain (1996, RSDN-5) *GRI 4970 — North-Western Chayka Chain *And also North-Caucasian, South-Ural (GRI 5970), Siberian, Angarsk, Sayansk, Transbaikalian, Far East chains deployed on the basis of low-power mobile stations RSDN-10. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「CHAYKA」の詳細全文を読む スポンサード リンク
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