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Two additional Compass/Beidou-2 spacecraft were launched by China

The BeiDou satellite navigation system is a global satellite navigation system independently developed by China, which is capable of providing not only positioning, navigation and time synchronisation services, but also short message communication services. The construction of the Beidou system is an important achievement in the field of Chinese aerospace science and technology, and it marks China's remarkable progress in satellite navigation technology.

According to the information you have provided, the two satellites launched on 19 September 2012 are the 14th and 15th satellites of the Beidou system, and they may be medium earth orbit (MEO) satellites. The construction of the BeiDou system has been carried out in phases. Starting from 2007, China has launched a number of satellites to build the BeiDou-2 system, with the ultimate goal of forming a global network of 35 satellites.

The development of the BeiDou system is of great significance in improving China's national security, promoting economic and social development and enhancing China's influence in the field of global navigation satellite systems. It can provide services not only for Chinese users, but also for users in the Asia-Pacific region and even globally, enhancing China's competitiveness in the global satellite navigation market.

The construction of the Beidou system is a microcosm of the rapid development of China's aerospace industry, reflecting China's determination to continuously pursue independent innovation and breakthroughs in the field of high technology. With the continuous improvement and development of the Beidou system, it will play an increasingly important role in many fields such as transport, fishery, meteorology and rescue.

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