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The Yosemite experiments: HF propagation through rock
Author(s) -
Lytle R. Jeffrey,
Lager Darrel L.
Publication year - 1976
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs011i004p00245
Subject(s) - dielectric , electromagnetic radiation , electromagnetic pulse , pulse (music) , materials science , wave propagation , national park , mineralogy , physics , geology , optics , optoelectronics , geography , archaeology , detector
A variety of continuous wave, swept frequency, and pulse transmission experiments were conducted in and around the Wawona Tunnel at Yosemite National Park. The experiments were performed to obtain data on the HF electrical properties of large volumes of rock. The experiments involved the propagation of electromagnetic waves through more than 300 m (1000 ft) of granite. In situ bulk conductivities of 2–5 × 10 −4 mho/m and relative dielectric constants of 5–7 were measured in the 3–50 Hz band. Experimental errors in these values are estimated to be less than ±9% and ±10%, respectively.