|
EL/M-2070 TecSAR,〔http://www.iai.co.il/35683-41695-EN/Euronaval_2010_Products_EO.aspx〕 also known as TechSAR, Polaris and Ofek-8, is an Israeli reconnaissance satellite, equipped with synthetic aperture radar developed by Elta Systems. It was successfully launched at 03:45 GMT (09:15 local time) on 21 January 2008, by PSLV C-10 Launch Vehicle, from the Satish Dhawan Space Centre in India. The TecSAR satellite is fitted with a large dish-like antenna to transmit and receive radar signals that can penetrate darkness and thick clouds. Built by Israel Aerospace Industries, TecSAR ranks among the world's most advanced space systems.〔Ninan Koshy, "(India and Israel Eye Iran )", ''Foreign Policy in Focus'', 13 February 2008.〕 Elta Systems Ltd cooperates with Azerbaijan to produce a TecSAR reconnaissance satellite system for the country.〔(Azerbaijan Mum about Israeli Spy Plane, Satellite Projects )〕 According to Azerbaijani military experts, this is an indispensable system for military operations in the mountainous terrains of Azerbaijan.〔(Israel rearms Azerbaijani army )〕 ==Launch== The satellite was successfully delivered into its target orbit about twenty minutes after launch. The four-stage PSLV rocket flew in the CA, or "Core Alone" configuration, with no strap-on solid rocket boosters. PSLV-C10, as the rocket used to launch TecSAR was designated, was the second flight of a PSLV-CA, and the twelfth overall for the PSLV series. Launch was contracted by the Antrix Corporation, the commercial department of the Indian Space Research Organisation, ISRO. The TecSAR represents the first Israeli use of the Indian PSLV launcher. This made possible an orbit that could not be reached from Israel, with an altitude of 450-580 kilometers and inclination of 41 degrees. As a result, TecSAR cruises from west to east, unlike all the other surveillance satellites launched from Israel itself. The PSLV was selected as TecSAR's launch vehicle since the Shavit rocket that was used to launch the Ofeq series of satellites put constraints on possible satellite orbits. Any launch from Israeli territory must be directed westwards, towards the sea, in order to prevent the launcher's first stages (or the satellite itself, in case of a malfunction) from falling on populated areas or on foreign territory. A westward launch, that is, against the direction of the Earth's rotation, seriously restricts the weight of the satellite that the launch vehicle can carry. In the past, Israel also experienced several failures - the most recent example being the attempted Ofeq-6 launch in March 2004. In such cases, security links and the operational experience of another partner can allow alternative launches when needed.〔(Yiftah Shapir: Launch Of Israel's TecSAR Satellite )〕 The launch was delayed several times for unclear reasons. At one point, it was rumoured that the launch had been cancelled completely due to pressure from the US Government.〔 〕〔(JTA - Satellite launch delayed again )〕 Indian and Israeli authorities denied this, however, citing technical problems instead.〔(The Hindu - Israeli satellite launch by ISRO runs into 'tech difficulties' )〕 In Israel it was rumoured that the launch had been delayed due to Iranian pressure on the Indian government.〔Yaakov Katz, "(Iran delayed satellite launch )", ''The Jerusalem Post,'' 22 January 2008, accessed 13 February 2008.〕 However this was eventually proven to be baseless speculation. 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「TecSAR」の詳細全文を読む スポンサード リンク
|