@article{oai:nagoya.repo.nii.ac.jp:00019678, author = {石川, 晴治 and 竹内, 利雄 and ISIKAWA, Haruzi and TAKEUTI, Tosio}, issue = {1-2}, journal = {空電研究所報告}, month = {Apr}, note = {Simultaneous recording of electrostatic field change,atmospheric waveform and lightning flash photograph by Boys' camera succeeded partially during the thunderstorm observation last summer. Slow electrostatic field change and atmospheric waveform records associated with a cloud discharge has been investigated and the possibilities have been suggested that the slow discharge processes in thundercloud should be mainly composed from corona discharges of various kinds between two point charge centers. Atmospheric waveform and lightning flash hotograph records associated with a cloud discharge have made it clear that specially rapid dart leader carrying fair quantity of electricity radiates an atmospheric waveform of main discharge type. The correlated electrostatic ifeld change and atmospheric waveform records of a ground discharge were also obtained. The investigation of these waveform records has made it possible to classify the ground discharges into two classes according as the discharge has α type stepped leader or β type stepped leader. Following to this investigation no less than 60 % of recorded ground discharges had β type stepped leader in last summer. In spite of the insufficient number of available data at present it seems to have some grounds to consider that the greater part of ground discharges in our country have β type stepped leaders. It has also been made clear that a clear streamer discharge that radiates a remarkable atmospheric pulse is always associated with somewhat slow subdischarges in the thundercloud.}, pages = {1--5}, title = {近距離空電波形の研究(第7報) : 雷放電過程と空電の発生}, volume = {6}, year = {1956} }