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Что (кто) такое lowest$518566$ - определение
RADIO TRANSMISSION TERM
Lowest usable frequency
List of lowest airports
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WIKIMEDIA LIST ARTICLE
Lowest airports; World's lowest airports; List of lowest commercial airports
This is a list of the world's lowest civilian airports, situated less than above mean sea level. The facility must be public, include at least one hard paved runway, and support general or commercial aviation .
Lowest usable high frequency
The lowest usable high frequency (LUF), in radio transmission, is a frequency in the HF band at which the received field intensity is sufficient to provide the required signal-to-noise ratio for a specified time period, e.g.
Irreducible fraction
FULLY SIMPLIFIED FRACTION
In lowest terms; Lowest terms; Lowest Terms; Reduced fraction; Fully reduced fraction; Completely reduced fraction; Reducible fraction
An irreducible fraction (or fraction in lowest terms, simplest form or reduced fraction) is a fraction in which the numerator and denominator are integers that have no other common divisors than 1 (and −1, when negative numbers are considered). In other words, a fraction is irreducible if and only if a and b are coprime, that is, if a and b have a greatest common divisor of 1.
Википедия
Lowest usable high frequency
The lowest usable high frequency (LUF), in radio transmission, is a frequency in the HF band at which the received field intensity is sufficient to provide the required signal-to-noise ratio for a specified time period, e.g., 0100 to 0200 UTC, on 90% of the undisturbed days of the month. Any frequency lower than this is not able to fulfill those requirements, while higher frequencies usually yield better result until the maximum usable frequency is reached. The amount of energy absorbed by the lower regions of the ionosphere (D region, primarily) directly impacts the LUF.
