Hi, While searching for information on the antenna system this link has some information. http://html.rhhz.net/GCDZXB/html/20190322.htm. Need to use Google Translate. Regards, Edgar Moonah, Tasmania.
Hi Edgar, A most informative link, thank you. They seem to be operative from 0.1...300 Hz. In 2015 they started transmitting. Maybe Paul can still find a carrier transmission in his data storage. I c
Source: "Ran, Wang Ruo, Pei Qingyun, et al. 2019. Signal detection test of extremely low frequency electromagnetic (WEM) method[J]. Journal of Engineering Geology, 27(3): 668-675. doi: 10.13544/j.cnk