Ambiguity resolution in precise point positioning with hourly data for global single receiver
Ambiguity resolution in precise point positioning with hourly data for global single receiver
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全球单一接收器每小时数据精确单点定位的模糊度解析
DOI：
10.1016/j.asr.2012.08.008
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发表时间：
2013-01-01
影响因子：
2.6
通讯作者：
Guo, Fei
中科院分区：
文献类型：
--
作者：
Zhang, Xiaohong;Li, Pan;Guo, Fei
整周模糊度解算(JAR)可以显著提高精密单点定位(PPP)的精度。近年来，用于PPP的JAR成为全球定位系统(GPS)界的一个热点话题。越来越多的研究者开始关注这一问题。最近几年取得了进展。本文旨在通过为宽车道和窄车道提供常规的零差分分数偏移量(UFO)来研究和演示全球零差(ZD)PPP JAR服务为GPS用户提供的性能。使用从2010年DOY 1、100、200和300收集的所有IGS站的数据集来验证和演示这项全球服务。静态实验结果表明，固定模糊度的PPP解在水平方向精度优于1 cm，垂直方向精度在1-2 cm之间。与PPP浮选方案相比，所有测试站点的东部、北部和垂直方向的平均改善分别达到58.2%、28.3%和23.8%。运动学实验结果表明，运动PPP溶液的均方根值可以从21.6、16.6和37.7 mm分别提高到12.2、13.3和34.3 mm。静态和动态实验表明，可以生成所有卫星的宽车道和窄车道UFO产品，并以常规方式随卫星轨道和时钟产品提供给世界各地的PPP用户，以获得准确可靠的模糊固定PPP解决方案。(C)2012年空间研委会。爱思唯尔有限公司出版。保留所有权利。
Integer ambiguity resolution (JAR) can improve precise point positioning (PPP) performance significantly. JAR for PPP became a highlight topic in global positioning system (GPS) community in recent years. More and more researchers focus on this issue. Progress has been made in the latest years. In this paper, we aim at investigating and demonstrating the performance of a global zero-differenced (ZD) PPP JAR service for GPS users by providing routine ZD uncalibrated fractional offsets (UFOs) for wide-lane and narrow-lane. Data sets from all IGS stations collected on DOY 1, 100, 200 and 300 of 2010 are used to validate and demonstrate this global service. Static experiment results show that an accuracy better than 1 cm in horizontal and 1-2 cm in vertical could be achieved in ambiguity-fixed PPP solution with only hourly data. Compared with PPP float solution, an average improvement reaches 58.2% in east, 28.3% in north and 23.8% in vertical for all tested stations. Results of kinematic experiments show that the RMS of kinematic PPP solutions can be improved from 21.6, 16.6 and 37.7 mm to 12.2, 13.3 and 34.3 mm for the fixed solutions in the east, north and vertical components, respectively. Both static and kinematic experiments show that wide-lane and narrow-lane UFO products of all satellites can be generated and provided in a routine way accompanying satellite orbit and clock products for the PPP user anywhere around the world, to obtain accurate and reliable ambiguity-fixed PPP solutions. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.