摘要:

Ground conductivities, as determined by field strength measurements of broadcasting stations using T. L. Eckersley's approximation to Sommerfeld's propagation formula, are given for many areas in Canada. A correlation is shown to exist between the ground conductivities thus found and the geological character of the area under study. The practical utility of these measurements in the selection of sites for transmitters, and in the estimation of field strength contours therefrom, is indicated.

ISSN:1923-4287    

DOI:10.1139/cjr40a-010

出版商:NRC Research Press    

年代:1940

数据来源: NRC

摘要:

The thermal conductivity of some Canadian limestones and slate has been measured. The results are in satisfactory agreement with those of other experimenters, but there was evidence of changes in the stone, even at temperatures below 700° F.; this vitiates the value, from a geophysical standpoint, of these and other determinations.

ISSN:1923-4287    

DOI:10.1139/cjr40a-011

出版商:NRC Research Press    

年代:1940

数据来源: NRC