卫星导航高精度测速探讨

卫星导航系统具有精度高、全天候、覆盖范围广等优点，若能有效利用其载波和导航电文，可以从中解算出高精度速度信息。本文根据载波跟踪环路的特点及载波跟踪参数的特性，从理论上分析比较了瞬时多普勒测速和载波相位测速的精度。最后通过工程试验验证表明，载波相位测速法相对瞬时多普勒测速有一个数量级的提高，理论与分析基本吻合。

High-Precision Velocity Resolving of Satellite Navigation System

The satellite navigation system has advantages of high-precision, all times and wide-range. The high-precision velocity message including in navigation message can be resolving by specific arithmetic. According to the characteristics of carrier tracking loop and tracking parameters. This paper compares the Doppler velocimetry and the Carrier Phase velocimetry in theories. Experiments show that the Carrier Phase velocimetry is better than the Doppler velocimetry has orders of magnitude increase. The theories and analysis is basically consistent.