An experimental investigation of ELF attenuation rates in the Earth-ionosphere duct

A Simplex Method for Function Minimization

J. A. Nelder, R. Mead · The Computer Journal · 1965 · 28.9K citations

Natural Sciences, Computer Science, Mathematics +8

Approximate method for determining ELF eigenvalues in the earth‐ionosphere waveguide

Carl Greifinger, Phyllis Greifinger · Radio Science · 1978 · 187 citations

Natural Sciences, Electrical Engineering, Physics +13

Approximate Schumann resonance parameters for a two-scale-height ionosphere

D. D. Sentman · Journal of Atmospheric and Terrestrial Physics · 1990 · 110 citations

Natural Sciences, Earth Sciences, Physics +12

Method of obtaining radiowave propagation parameters for the Earth–ionosphere duct at e.l.f.

M. Ishaq, D. Llanwyn Jones · Electronics Letters · 1977 · 64 citations

Engineering, Earth Sciences, Electrical Engineering +10

ELF propagation update

P. Bannister · IEEE Journal of Oceanic Engineering · 1984 · 60 citations

Engineering, Earth Sciences, Electrical Engineering +13