非差模糊度整数固定解PPP新方法及实验

基金项目: 国家自然科学基金资助项目(40874017)；国家创新研究群体科学基金资助项目(40721001)；国家973计划资助项目(2006CB701301)

详细信息

A New Method for Zero-Differenced Interger Ambiguity Resolution and Its Application to PPP

¹School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家自然科学基金资助项目(40874017)；国家创新研究群体科学基金资助项目(40721001)；国家973计划资助项目(2006CB701301)

摘要: 分析了标准模型中非差模糊度无法固定的原因,提出了非差模糊度整数解的小数偏差分离(fractional bias isolating,FBI)模型与方法。实验结果表明,使用30min的静态观测数据,即可达到水平方向mm级、高程cm级的定位精度,相比浮点解水平方向精度提高了一个数量级,高程方向也改善了50%～60%,同时,对流层天顶延迟ZPD的精度也有20%～30%的改善。
- 精密单点定位 /
- 非差模糊度固定 /
- 未检验小数偏差 /
- FBI模型 /
- LAMBDA
Abstract: We analyze the reason that zero-differenced ambiguity cann’t be fixed in a standard mode.We proposed the FBI(fractional bias isolation) mode and method for zero-differenced interger ambiguity resolution.We found that with 30 min observations,the accuracy of mm-level in horizontal and cm-level in elevation direction can be achieved,which has respectively enhanced one order of magnitude and has improved approximately 50%-60% in horizontal and elevation direction compared to float solution.In the meantime,the accuracy of ZPD(zenith path delay) estimation has been also ameliorated about 20%-30%.
- precise point positioning /
- zero-differenced ambiguity resolution /
- uncalibrated fractional offsets /
- fractional bias isolating model /
- LAMBDA