The inversion ionosphere parameters based on the automatic model for tweek atmospherics (Zhang et al., 2023) recorded by the VLF sensor in Duke Forest during January to April, 2010.

48395 1st-order tweeks in total, the variables are:dt, Occurrence time for each tweek signal h, Reflection height of the tweek signal (Unit: [km])Ne, The electron density at the reflection height (Unit: [cm-3])D, Horizontal propagation distance of the tweek signal (Unit: [km])pos, The source lightning location [latitude, longitude](Note: to trace the source lightning, the NLDN lists are used to compare the lightning stroke time and the start time of the tweek signals)Reference:Zhang, M., Lu, G. P., Huang, H. L., Cheng, Z. W., Chen, Y. Z., Cummer, S. A., Zheng, J. Y., and Lei, J. H. (2023). Automatic recognition of tweek atmospherics and plasma diagnostics in the lower ionosphere with the machine learning method. Earth Planet. Phys., 7(3), 1–7. http://doi.org/10.26464/epp2023039