主要介绍了4种GPS测速方法,给出了各种方法的特点与适用范围,得出了4种方法的测速结果。中心平滑微分求速方法克服了常用微分平滑求速方法计算速度慢以及当部分位置数据出现较大跳跃时,计算出的载体速度严重偏离实际速度的缺点。通过对某次试验的GPS实测数据进行处理,采用中心平滑微分求速,得出的载体速度精度高,能够满足绝大部分领域的测速要求。

Four methods for calculating GPS receivers velocity are introduced,and the features and application scopes of each method are presented.By using a group of GPS measurement data,the velocity measurement results of the four methods were calculated out.The result showed that the central-smoothing differential method can overcome the shortcomings of the common differential smoothing method,which is slow in calculation and the calculated velocity may have a great error when some of the raw GPS data are bad.While using the central smoothing differential algorithm,the measured velocity of carrier is high in accuracy,which can satisfy the velocity-measurement precision requirement in many areas.