@article{oai:nagoya.repo.nii.ac.jp:00020304,
 author = {NAKAI, Taketoshi and NAGATANI, Masahiro and NAKANO, Minoru},
 journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University},
 month = {Mar},
 note = {The electric field-intensity-changes at the source of atmospherics have been measured statistically at the two different frequencies 3 and 90 kHz at Imaichi Observatory in summer, 1970. The four statistical parameters, i. e., CRD, APD, OTID and PWD, have been analyzed from the observational data of the field-intensity-changes. By the comparison between the same kind of statistical parameters which have been obtained at the two frequencies for the different years, we have found the evidence that (1) the characteristic features of CRD and APD curves do not change from a year to another remakably, provided the comparison being made on the same frequency, while in the comparison on different frequencies the features change appreciably, (2) some feature of OTID curves at 3 kHz appreciably differs from at 90 kHz.},
 pages = {13--20},
 title = {ON THE STATISTICAL MEASUREMENT OF VERTICAL ELECTRIC FIELD-INTENSITY-CHANGE ON 3 AND 90KHz AT THE SOURCE OF ATMOSPHERICS},
 volume = {19},
 year = {1972}
}