Amplitude scintillations in Global Navigation Satellite System (GNSS) signals are commonly observed at low latitudes and are frequently associated with equatorial plasma bubbles. The scintillation severity is enhanced around the equatorial ionization anomaly, being controlled, in great part, by the ionospheric F-region background density. This work proposes the use of collocated observations from space-based and distributed ground-based monitors to quantify the relationship between the background F-region peak electron density (NmF2) and scintillation severity. To test the proposed approach and its feasibility, NmF2 observations from the Global-scale Observations of the Limb and Disk (GOLD) instrument and L-band scintillation measurements made by a network of GNSS-based scintillation monitors were used. The observations were made at low latitudes in October 2022, during the ascending phase of solar cycle 25. Results show the influence of background NmF2 on scintillation severity. The results also quantify the control of the latitudinal distribution of maximum S₄ values [S_{4 (max)}] by the latitudinal variation of NmF2. An empirical relationship between NmF2 and S_{4 (max)} for a given local time was also derived for the time of GOLD observations. An application of the empirical relationship between NmF2 and maximum S₄ is illustrated with regional (Brazilian) maps of potential maximum scintillation severity using GOLD-like data. Encouraging results include showing that S_{4 (max)} can be estimated from independent observations for a distinct longitude sector, but similar solar flux and season. Future studies will address to what extent the relationship between NmF2 and S_{4 (max)} varies for different geophysical conditions.

全球导航卫星系统（GNSS）信号中的振幅闪烁通常在低纬度地区观察到，并且经常与赤道等离子体气泡相关。赤道电离异常周围的闪烁严重程度增强，很大程度上受电离层 F 区背景密度的控制。这项工作建议使用来自天基和分布式地面监测器的并置观测来量化背景 F 区域峰值电子密度 (NmF2) 和闪烁强度之间的关系。为了测试所提出的方法及其可行性，使用了来自全球尺度肢体和盘观测（GOLD）仪器的 NmF2 观测以及基于 GNSS 的闪烁监测器网络进行的 L 波段闪烁测量。这些观测是在 2022 年 10 月第 25 太阳周期的上升阶段在低纬度地区进行的。结果显示了背景 NmF2 对闪烁强度的影响。结果还量化了 NmF2 的纬度变化对最大S ₄值 [ S _{4 (max)} ]纬度分布的控制。还针对 GOLD 观测时间导出了给定当地时间的NmF2 和S _{4 (max)}之间的经验关系。NmF2 和最大S ₄之间的经验关系的应用通过使用类似 GOLD 数据的潜在最大闪烁强度的区域（巴西）地图来说明。令人鼓舞的结果包括表明S _{4（最大值）}可以根据不同经度扇区的独立观测来估计，但太阳通量和季节相似。未来的研究将解决 NmF2 和S _{4 (max)}之间的关系在不同的地球物理条件下变化的程度。