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首页> 外文会议>ION Pacific PNT Meeting >Determination of the Parameters of a Japanese-Regional Klobucher Ionospheric Model Based on GR Models and SCH Analysis by GEONET Data
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Determination of the Parameters of a Japanese-Regional Klobucher Ionospheric Model Based on GR Models and SCH Analysis by GEONET Data

机译：基于GR模型和地理学数据的SCH分析测定日本区域Klobucher电离层模型的参数

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摘要

Ionosheric delay is one of the major error sources in GNSS (Global Navigation Satellite System) positioning. For single frequency system, it is important to effectively correct the ionospheric delay. The so-called Klobuchar's ionospheric model has been widely used due to its simple computation and its generality (globalization). However, it is well known that the model may correct about 50% RMS ionospheric errors. In this paper, therefore, we establish a method of determination of the more accurate parameters of the regional Klobuchar model based on GR (GNSS Regression) models and SCHA (Spherical Cap Harmonics Analysis). By the SCH model, it has been reported that the ionospheric delays can be well modeled in the regional area such as the sky over Japan. However, comparing with the Klobuchar model, the SCH model needs more number of parameters and computational burden. We present the method to derive Japanese-regional Klobuchar model based on minimizing mean square errors of Ionosheric delays between SCH models and the regional Klobuchar model. Finally, we examine the accuracy of VTECs estimation and positioning results using our Japanese-regional Klobuchar model, in comparison with using the original global Klobuchar model broadcasted by GPS. Our experimental results show that our regional Klobuchar model well works. In the single frequency usage, we show that our model can improve more than 50% for using the original Klobuchar model in the positioning accuracy.
机译：Ionosheric Delay是GNSS（全球导航卫星系统）定位的主要误差源之一。对于单频系统，重要的是有效校正电离层延迟。由于其简单的计算及其一般性（全球化），所谓的Klobuchar的电离层模型已被广泛使用。然而，众所周知，该模型可以校正约50％的RMS电离层误差。因此，在本文中，我们建立了一种确定基于GR（GNSS回归）模型和SCHA（球面盖次谐波分析）的区域Klobuchar模型更准确参数的方法。通过SCH模型，据报道，电离层延迟可以在日本天空等地区建模良好。但是，与Klobuchar模型相比，SCH模型需要更多的参数和计算负担。我们提出了基于最小化SCH模型与区域Klobuchar模型的离子主持延迟的均方误差来获得日本区域Klobuchar模型的方法。最后，与使用GPS播放的原始全球Klobuchar模型相比，我们使用日文区域Klobuchar模型来研究VTECS估计和定位结果的准确性。我们的实验结果表明，我们的区域Klobuchar模型很好的工作。在单一频率使用中，我们表明我们的模型可以在定位精度下使用原始klobuchar模型提高50％以上。

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