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GNSS provides signals from space, which help determine the location of the user by using the timing and position of the data transmitted from the space. GNSS radio signals are complex, as they have a frequency of about 1.5 GHz (gigahertz) per 1.5 billion cycles per second. GNSS requires frequencies that are higher than FM radio, but lower than a microwave oven, for proper functioning. 更多
