发表机构
Indian Centre for Space Physics（印度空间物理中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出一种自主模型，通过求解电子连续性方程计算D区电子密度并提取Wait参数，利用LWPC框架模拟印度两条VLF路径的日间信号振幅，与观测数据良好吻合，验证了方法的物理一致性和预测潜力。
AI 中文摘要
我们提出了一种自主模型来模拟亚电离层甚低频（VLF）信号振幅的日间变化，该模型首先通过数值求解电子连续性方程（ECE）来计算D区电子密度。从由此得到的随高度变化的电子密度剖面（Ne）中，我们使用对数线性拟合方法提取Wait的电离层参数（h'和β）。本研究聚焦于印度境内的两条VLF传播路径（一条短程和一条中程），它们源自VTX（18.2 kHz）发射机。该模型采用长波传播能力（LWPC）框架来重现日间VLF信号振幅剖面。它准确捕捉了在孟加卢鲁（BAN）站观测到的日间变化，该站地面波分量占主导地位，以及在西孟加拉邦库库尔达（KHK）站的日间变化。模拟振幅（Asim）与观测振幅（Aobs）之间的定量比较显示出良好的一致性，支持了所提出方法的物理一致性和潜在预测能力。
英文摘要
We present an autonomous model to simulate the daytime variation of sub-ionospheric Very Low Frequency (VLF) signal amplitude, beginning with the computation of the D-region electron density by numerically solving the electron continuity equation (ECE). From the resulting altitude-dependent electron density profile (Ne), we extract Wait's ionospheric parameters (h' and beta) using a log-linear fitting method. The study focuses on two VLF propagation paths (one short and one medium in length) in India, originating from the VTX (18.2 kHz) transmitter. The model employs the Long Wave Propagation Capability (LWPC) framework to reproduce the daytime VLF signal amplitude profile. It accurately captures the daytime variations observed at the Bengaluru (BAN) station, where the ground-wave component is dominant, as well as at Khukurdaha, WB (KHK). A quantitative comparison between the simulated (Asim) and observed (Aobs) amplitudes shows good agreement, supporting the physical consistency and potential predictive capability of the proposed approach.
Journal refChakraborty, S., Basak, T., Palit, S. et al. Astrophys Space Sci 371, 8 (2026)
DOI：10.1007/s10509-026-04541-z
