利用相位率和多普勒确定载体速度的比较
Comparison Between Phase-Rate and Doppler to Determine Velocity
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摘要: 利用GPS可以测定载体的运动速度,多普勒观测值可以用于测速,由相位观测值导出的相位变化率(即相位率)也可以用于速度测定,但是它们的精度和特性有很大的区别。阐述了两者之间的异同点,提出了一种新的周跳探测方法——双差相位率粗差法,然后分别使用GPS测量数据中这两种不同的观测值计算了载体速度,对处理结果进行了对比和分析。Abstract: Doppler and phase-rates are used to evaluate velocities.The different characters of the two methods are put forward.A new method of detection of cycle slips-double differentiated phase-rate bias is shown.The results indicate that the accuracy of velocity deduced from raw Doppler observations is 20~70 mm/s and that from derived Doppler can be 1~3 mm/s.
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