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    BEIDOU M4 can be found in the following categories:
    Beidou Navigation System

    NORAD ID: 38251
    Int'l Code: 2012-018B
    Perigee: 21,455.4 km
    Apogee: 21,600.0 km
    Inclination: 55.7 °
    Period: 773.2 minutes
    Semi major axis: 27905 km
    Launch date: April 29, 2012
    Source: People's Republic of China (PRC)
    Comments: BEIDOU M4 is a Chinese navigation satellite. China launched two navigation satellites on this mission, Beidou M3 and Beidou M4. This is the first time China launched a dual-satellite primary payload into high-altitude orbit. A dual-payload adapter was developed to launch the satellites one on top of the other inside the Long March nose fairing. Both satellites, Beidou M4 and Beidou M3, are part of the Beidou navigation constellation, also known as the Compass Navigation Satellite System (CNSS), China's second-generation satellite navigation system. CNSS is capable of providing continuous, real-time passive 3D geo-spatial positioning and speed measurement. The system will be dual use, based around a civilian service that will provide an accuracy of 10 meters in the user position, with the military and authorized user's service, providing higher accuracies. The long-term goal is to develop a global navigation satellite network consisting of a constellation of 35 vehicles by 2020. The satellites have a lifespan of 12 to 15 years.

    Two Line Element Set (TLE):

    1 38251U 12018B   15108.07291681 -.00000013  00000-0  10000-3 0  9999
    2 38251 055.6535 080.2429 0025904 205.5022 233.6017 01.86234274 20349
    Source: AFSPC

    NASA's NSSDC Master Catalog entry for BEIDOU M4

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