2018-2019年全球电离层格网样本数据

2018-2019年全球电离层格网样本数据提供了全球范围内的格网点处的电离层总电子含量TEC信息，格网以纬度2.5度经度5度的空间分辨率给出，其单位为0.1TECu；该数据产生方式为加工处理数据；数据源为自主产生。利用全球均匀分布的GNSS接收机观测数据，采用非差非组合精密单点定位方法提取GNSS接收机上电离层延迟信息，利用球谐函数建立全球电离层模型，采用自研的全球电离层产品生成软件，基于电离层/接收机差分码偏差同步估计方法，通过最小二乘法解算电离层球谐函数模型系数，并根据全球电离层格网划分方案生成全球电离层格网产品数据；该数据精度优于2.0TECu，可为用户提供全球电离层TEC信息，用于GNSS高精度定位、电离层空间天气监测等，具有非常高的应用价值。

2018–2019 Global Ionospheric Grid Sample Dataset provides total electron content (TEC) information at global grid points, with a spatial resolution of 2.5° in latitude and 5° in longitude, and the unit is 0.1 TECu. This is a processed dataset with a self-generated source. Observation data from globally uniformly distributed GNSS receivers are used to extract ionospheric delay information at the receivers via the un-differenced and uncombined precise point positioning (PPP) method. A global ionospheric model is then established using spherical harmonic functions. Leveraging a self-developed global ionospheric product generation software, and based on the synchronous estimation method for ionospheric and receiver differential code biases, the coefficients of the ionospheric spherical harmonic model are solved through the least squares method. Finally, the global ionospheric grid product data is generated in accordance with the global ionospheric grid division scheme. This dataset achieves an accuracy superior to 2.0 TECu, and can provide users with global ionospheric TEC information for applications such as GNSS high-precision positioning and ionospheric space weather monitoring, featuring extremely high application value.

搜集汇总

背景与挑战

背景概述

该数据集为2018-2019年全球电离层格网样本数据，提供全球尺度的总电子含量（TEC）信息，空间分辨率为纬度2.5度、经度5度。数据基于GNSS接收器观测，采用非差非组合精密单点定位方法和球谐函数建模生成，精度优于2.0 TECu，适用于GNSS高精度定位和电离层空间天气监测等应用。