Studies of Cosmic-Ray Scintillations Observed at Syowa Station, Antarctica (I)
Using 5-minute data of cosmic-ray neutron and meson intensities observed at Syowa Station, Antarctica in July and December 1970, short term variations covering the periods from 10 to 120 minutes have been investigated by a tool of sonagraph-type analyzer, in terms of enhancements in spectral power d...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English Japanese |
| Published: |
National Institute of Polar Research
1975
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| Subjects: | |
| Online Access: | https://doi.org/10.15094/00007829 https://doaj.org/article/9e0a9f95446a4c78b95eacbec77312a2 |
| Summary: | Using 5-minute data of cosmic-ray neutron and meson intensities observed at Syowa Station, Antarctica in July and December 1970, short term variations covering the periods from 10 to 120 minutes have been investigated by a tool of sonagraph-type analyzer, in terms of enhancements in spectral power density as a function of time. Dynamic spectra thereby deduced show that there occurred, for the neutron component alone, seven times the enhanced cosmic-ray scintillations (called ECS) which exhibit the period of a few ten minutes with the persistent time from a few hours to one day. It is also shown that ECS events are not related to solar-terrestrial phenomena but to atmospheric pressure and wind velocity disturbances in the upper atmosphere. The presently observed ECS events are not of the extra-terrestrial origin but of the atmospheric origin |
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