Polish UK

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Technology

1) based on the theory domain of activity, involving the production of the phenomena and objects not naturally occurring in nature. 2) knowledge of the practical application of scientific achievements in industry, transport, medicine, etc. 3) a manner of accomplishing a task, especially using technical processes, methods, or knowledge. 4) technical equipment (a set of tools, machines, and their arrangement).

Telecommunication

Any transmission, emission, reception or processing of signs, signals, writing, images and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic systems.

Telecommunications system

Telecommunications system is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment usually capable of interconnection and interoperation to form an integrated whole.

Terrain roughness

Measure of terrain geomorphology. Roughness can be defined several ways. A roughness index may be the standard deviation of slope, standard deviation of elevation, slope convexity, variability of plan convexity (contour curvature), or some other measure of topographic texture.

Transmission Channel

A (parameterized) means of transmission of signals in one direction between two points.

Transmission loss

Decrease in power that occurs during transmission from one point to another.

Transmitter

Station used to broadcast radio signals.

Transmitter (output) power

The actual amount of power of radio frequency energy that a transmitter produces at its output.

Notes

Usually measured in W or dBW.

Troposphere

The lowest portion of Earth's atmosphere. The average depth of the troposphere is approx. 16-18 km above the equator, and 8-10 km above the poles. It contains approximately 80% of the atmosphere's mass and 99% of its water vapour and aerosols.

Tropospheric duct

Tropospheric waveguide (horizontal layer in the lower atmosphere) in which the radio waves (VHF, UHF) propagate. Arises when temperature inversions arise above the ground, or if the increase in height is accompanied by a rapid decrease in humidity.