Performance Analysis of COMPASS for the Asia-Pacific Region

Based on 18 stations of the Asia-Pacific region, satellite visibility, dilution of precision (DOP), availability, positioning accuracy of COMPASS are calculated and analyzed in detail. Simulation results reveal that the constellation performances, such as satellite visibility, DOP, availability, positioning accuracy of COMPASS are good, under the low mask angle such as 10 degrees, but the performances have a trend of becoming bad with the increase of mask angle, especially in the middle high latitudes, the performance drops quickly, for the Asia-Pacific region. Some methods, such as integrated navigation system, differential positioning technology, and so on, ought to be employed to enhance performance.