New results of ionospheric Total Electron Content (TEC) measurements obtained from a newly installed low-cost multi-frequency Global Navigation Satellite System (GNSS) U-BLOX receiver at Abuja-Nigeria (Geographic: 8.99° N, 7.38° E; Geomagnetic: 1.6° S) is presented. The paper motivates the use of the U-BLOX receiver for TEC studies in the African equatorial region. Data obtained for the periods of July-August and November-December 2020 are used. TEC data from the U-BLOX are compared with TEC obtained from a nearby high-cost GNSS receiver, and with COSMIC – RO (Constellation Observing System for Meteorology Ionosphere and Climate – Radio Occultation) TEC measurements. Corresponding TEC values from the AfriTEC and NeQuick ionospheric models are also presented. The results show an excellent level of agreement between the U-BLOX and high-cost GNSS receiver measurements. The COSMIC values were typically less than the U-BLOX and high-cost receiver values, and this is mainly attributed to the difference in TEC integration heights used for the two systems. The correlation coefficients between the U-BLOX values and values from the other four datasets are mostly greater than 0.9. The root-mean-square differences (RMSDs) between the U-BLOX and high-cost receiver values are about 2 TECU and less. The RMSDs between the U-BLOX values and values from each of the AfriTEC and NeQuick models are less than 5 TECU. The values are comparable and even lower than values computed in previous research that used TEC from high-cost receivers. There is also consistent and significant agreement between 30-second ROT values computed from both the low-cost and high-cost receivers. These results summarily indicate that the U-BLOX is a good candidate for TEC studies in the region, just like the high-cost receivers.

从阿布贾-尼日利亚（地理：8.99° N，7.38° E；地磁： 1.6° S)。该论文激发了在非洲赤道地区使用 U-BLOX 接收器进行 TEC 研究的动机。使用了 2020 年 7 月至 8 月和 11 月至 12 月期间获得的数据。来自 U-BLOX 的 TEC 数据与从附近的高成本 GNSS 接收器获得的 TEC 以及 COSMIC – RO（气象电离层和气候星座观测系统 – 无线电掩星）的 TEC 测量值进行了比较。还提供了来自 AfriTEC 和 NeQuick 电离层模型的相应 TEC 值。结果表明 U-BLOX 和高成本 GNSS 接收器测量之间的一致性非常好。COSMIC 值通常小于 U-BLOX 和高成本接收器值，这主要归因于用于两个系统的 TEC 集成高度的差异。U-BLOX 值与来自其他四个数据集的值之间的相关系数大多大于 0.9。U-BLOX 和高成本接收器值之间的均方根差 (RMSD) 约为 2 TECU 或更少。U-BLOX 值与每个 AfriTEC 和 NeQuick 模型的值之间的 RMSD 小于 5 TECU。这些值具有可比性，甚至低于之前使用来自高成本接收器的 TEC 的研究计算的值。从低成本和高成本接收器计算的 30 秒 ROT 值之间也存在一致且重要的一致性。这些结果概括地表明 U-BLOX 是该地区 TEC 研究的良好候选者，就像高成本接收器一样。