摘要
在精密单点定位中,能否准确可靠地探测载波相位观测量中出现的周跳,直接影响到定位的精度及可靠性。本文概述了Blewitt周跳探测方法的基础原理,并对周跳的探测算法进行了改进,将电离层残差组合观测量一次差的变化是否超限作为周跳存在与否的判断依据。最后利用一段人为加入了几个典型周跳组合的双频观测数据进行验证,结果表明,改进后的算法能准确探测出两个载波上大于1周的任意周跳,提高了周跳探测的准确性。
Positioning accuracy and reliability are directly affected by carrier phase cycle slip detection.In this paper,a method of Blewitt cycle slip detection is generalized,and an improvement is made for phase cycle slip detection.The gist is whether the single geometry-free difference is beyond the normal limit.A section of double frequency data with some typical cycle slips is adopted to verify the improvement.The results indicate that cycle slips more than 1 cycle can be successfully detected.The improvement increases the accuracy of cycle slip detection.
出处
《飞行器测控学报》
2011年第2期80-83,共4页
Journal of Spacecraft TT&C Technology
