精密单点定位模糊度固定效果分析

基金项目: 国家自然科学基金资助项目(41174010,41074025);武汉大学精密工程与工业测量国家测绘局重点实验室开放研究基金资助项目(PF2011-17)

详细信息

Accuracy Evaluation of Point Cloud Angular Resolution

¹School of Geodesy & Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China;²Hazard monitoring & prevention Research Center,Wuhan University,Wuhan 430079,China

Funds: 国家自然科学基金资助项目(41174010,41074025);武汉大学精密工程与工业测量国家测绘局重点实验室开放研究基金资助项目(PF2011-17)

摘要: 利用区域GNSS参考网络进行宽巷及窄巷硬件延迟的估计,进而利用硬件延迟估计值对PPP模糊度进行固定。使用重庆CORS数据对该方法进行了实验分析。结果表明,宽巷及窄巷硬件延迟在一段时期内均比较稳定,宽巷及窄巷固定成功率分别达90%、85%左右。相对于浮点解,固定解精度在测站东方向上提高了30%左右。
- 精密单点定位 /
- 模糊度固定 /
- 无电离层组合 /
- 硬件延迟 /
- 星间单差
Abstract: Angular resolution is the dominant factor for determining the extraction ability of a point cloud target.An angular resolution model is derived from average modulation transfer function(AMTF).The AMTF model is affected by sampling interval AMTFS、spot size AMTFb and quantization AMTFq.An accuracy assessment formula for sampling intervals and spot size was derived through an analysis of the error factor of sampling interval and spot size.The Linearization of AMTF model was based on the relationship among AMTF model、the sampling interval and spot size;The standard deviation of the cut-off frequency is derived according to the error propagation law;and an accuracy evaluation for angular resolution is achieved according to the relationship between cut-off frequency and angular resolution.
- angular resolution /
- sampling

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