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P-18 radar
The P-18 or 1RL131 Terek (also referred to by the NATO reporting name "Spoon Rest D" in the west) is a 2D VHF radar developed and operated by the former Soviet Union.
== Development ==
The P-18 early warning radar is a development of the earlier P-12 radar, the P-18 radar being accepted into service in 1970 following the successful completion of the radars test program. The P-18 was developed by the SKB Design Bureau, a division of State Plant No.197 named after V. I. Lenin who developed the previous P-12, the predecessor of the current Nizhny Novgorod Research Institute of Radio Engineering (NNIIRT). In 1979 a new secondary IFF radar the 1L22 "Parol" entered into service to complement the P-18, unlike the previous secondary radar NRS-12 (NATO "Score Board") the new interrogator was carried on a separate truck.
The P-18 is still in service today and was widely exported, many companies offer upgrade options to improve the performance and reliability of the radar and to replace out-dated components. NNIIRT offers an upgrade package for the P-18 which includes the installation of a solid state transmitter and receiver, automatic jammer suppression equipment as well as PC based signal processing, test and interface equipment.〔 These upgraded variants of the P-18 can be referred to as the P-18M, P-18-1 or P-18-2 depending on the manufacturer, modification and radar nationality. The P-18 was superseded by the 1L13 "Nebo" VHF surveillance radar in 1984. Currently, the Russian-Belarusian company Defense Systems provides upgrades for P-18 radars.〔(JSC Defense Systems )〕 Also Retia, a Czech civil and military electronics company, developed its own, fundamental modernisation of the P-18 under the name ReVEAL. It is now solid state, digitized and fitted with upgraded IFF system, while allowing to utilise also the legacy IFF. The whole equipment is repackaged into a standard container and already sold in several dozen units.〔()〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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