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Beijing SDI Science & Technology Co.,Ltd was established in 2003, and listed successfully in NEEQ in 2011(Stock Short Name: SDI; Stock code:430088), with main business oriented towards aviation, navigation, armament, electron, electricity, transportation and so on. The head office is located in Zhongguancun Yongfeng high-tech industrial base. The company was awarded the first national high-tech enterprises in December, 2008.SDI devotes to becoming the business leader in the field of Chinese navigation, and persisting in the developing road of independent innovation. What`s more, it focus on the service of development and production, sales, and technology of the products which mainly include GNSS high precision positioning, navigation, timing, attitude measurement and direction-finding of moving carrier and so on. The solid technological base and engineering service experience is contained widespreadly in system integration, data fusion, structural design, environmental adaptability, model algorithm, etc.