Ground conductivity information

Ground conductivity refers to the electrical conductivity of the subsurface of the earth. In the International System of Units (SI) it is measured in...

There are a number of possible ways to measure thermal conductivity, each of them suitable for a limited range of materials, depending on the thermal properties...

In science and engineering, hydraulic conductivity (K, in SI units of meters per second), is a property of porous materials, soils and rocks, that describes...

ground to a depth equal to the skin depth of the ground at that frequency, which is inversely proportional to the square root of ground conductivity σ...

omnidirectional signal, plus the region's mostly flat land and good ground conductivity, the station has unusually large daytime coverage, equivalent to...

area with very low ground conductivity (a requirement opposite to usual radio transmitter sites), bury two huge electrodes in the ground at different sites...

miles (320–480 km), with greater distances over terrain with higher ground conductivity, and greatest distances over salt water. The groundwave reaches further...

of power grids, the source ionospheric current systems and the 3D ground conductivity make an accurate analysis difficult. By being able to analyze major...

resistivity to the ground can still be effective in protecting a structure from lightning damage. When ground soil has poor conductivity, is very shallow...

wavelength. In areas of rocky or sandy soil where the ground conductivity is poor, above-ground counterpoises are sometimes used. Lower power transmitters...

of ground thermal conductivity to optimize the loopfield size, especially for larger commercial sites (e.g., over 10 wells). The efficiency of ground source...

and 1.9 dBi for the inverted vee. However, in practice, ground proximity and ground conductivity as well as end effects reduce the efficiency of the inverted...

to a medium-wave one. This is because ground-wave propagation suffers less attenuation due to ground conductivity at lower frequencies. Many countries...

provides redundancy in case any one of the ground paths is poor due to corrosion or poor ground conductivity. The additional electric grounding wire that...

exist. Ground waves propagate in vertical polarization, with their magnetic field horizontal and electric field (close to) vertical. Conductivity of the...

commercial buildings. The conductivity of the soil usually determines if Ufer grounds are required in any particular area. An Ufer ground of specified minimum...

undertake a geophysical survey of the grave site. Using electromagnetic and ground penetrating radar techniques, they identified an approximate position of...

transmitter power, and Manitoba's mostly flat land (with near-perfect ground conductivity) allow it to reach almost all of Manitoba during the day. CJOB airs...

contours are based on the standard ground wave field strength pattern, the frequency, and the ground conductivity in the area. While the FCC makes FM...

sight considerations. For lower frequencies a location with good ground conductivity is required. In case of microwave link chains, stations should be...

some run directionally continuously. While antenna efficiency and ground conductivity are taken into account when designing such an array, the FCC database...

strokes, dart leaders, and subsequent return strokes. The conductivity of the electrical ground, be it soil, fresh water, or salt water, may affect the...