登入選單

返回Google圖書搜尋

An Investigation of the Natural Electromagnetic Radiation Between 10 C/s and 10 Kc/s

Alv Egeland

出版	Air Force Cambridge Research Laboratories, Radio Astronomy Branch, United States Air Force, 1964
URL	http://books.google.com.hk/books?id=2wm9PgAACAAJ&hl=&source=gbs_api

註釋

Naturally occurring electromagnetic radiation in the audio-frequency range has been studied at Kiruna Geophysical Observatory (geomagnetic latitude 65.3N) since 1958. The results obtained are to some extent compared with similar measurements at Sagamore Hill, Mass., USA (geomagnetic latitude 54N) carried out during the same period. Several emission bands, which are quite distinct from the normal backgroundsignals and are obtained as strong enhancements in portions of the spectrum, have been recorded. (Author).