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На этой странице Вы можете получить подробный анализ слова или словосочетания, произведенный с помощью лучшей на сегодняшний день технологии искусственного интеллекта:
- как употребляется слово
- частота употребления
- используется оно чаще в устной или письменной речи
- варианты перевода слова
- примеры употребления (несколько фраз с переводом)
- этимология
Что (кто) такое usable direction - определение
RADIO TRANSMISSION TERM
Lowest usable frequency
cardinal point
![A [[compass rose]] showing the four cardinal directions, the four intercardinal directions, and eight more divisions.](https://commons.wikimedia.org/wiki/Special:FilePath/Brosen windrose.svg?width=200 "A [[compass rose]] showing the four cardinal directions, the four intercardinal directions, and eight more divisions.")
![Cardinal and non-compound intercardinal directions in Estonian and Finnish. Notice the intermixed "south" and "southwest". Further intermixing between directions south and northwest occur in other [[Finnic languages]].](https://commons.wikimedia.org/wiki/Special:FilePath/Ilmakaared+ilmansuunnat.svg?width=200 "Cardinal and non-compound intercardinal directions in Estonian and Finnish. Notice the intermixed \"south\" and \"southwest\". Further intermixing between directions south and northwest occur in other [[Finnic languages]].")
DIRECTIONS OF NORTH, EAST, SOUTH, AND WEST
Cardinal points; Intermediate direction; Cardinal Directions; Ordinal direction; Seven Directions; Seven directions; Ordinal directions; Intermediate directions; Cardinal directions; Northwest (direction); Southwest (direction); South (direction); North (direction); East (direction); Northeast (direction); Southeast (direction); West (direction); Cardinal point; Compass direction using a watch; Five Cardinal Points; Direction-finding watch; 5 cardinal point; Five cardinal point; North, South, East, and West; NSEW; Compass Direction Using Watch; Compass direction; Southeast (ordinal direction); Direction finding watch; Geographic direction; Direction Finding Watch; Intercardinal direction; Four Directions; Four directions; 4 Point Direction
¦ noun each of the four main points of the compass (north, south, east, and west).
Rail directions
GENERAL OR LOGICAL DIRECTION OF A RAILWAY LINE OR SERVICE
Railroad direction; Railway direction; Down (railway terminology); Railroad directions; Up (railway terminology); Inbound train; Outbound train; Outbound Train; Up line (railway); Down line (railway); Up train; Down train
Railroad directions are used to describe train directions on rail systems. The terms used may be derived from such sources as compass directions, altitude directions, or other directions.
Cardinal direction
DIRECTIONS OF NORTH, EAST, SOUTH, AND WEST
Cardinal points; Intermediate direction; Cardinal Directions; Ordinal direction; Seven Directions; Seven directions; Ordinal directions; Intermediate directions; Cardinal directions; Northwest (direction); Southwest (direction); South (direction); North (direction); East (direction); Northeast (direction); Southeast (direction); West (direction); Cardinal point; Compass direction using a watch; Five Cardinal Points; Direction-finding watch; 5 cardinal point; Five cardinal point; North, South, East, and West; NSEW; Compass Direction Using Watch; Compass direction; Southeast (ordinal direction); Direction finding watch; Geographic direction; Direction Finding Watch; Intercardinal direction; Four Directions; Four directions; 4 Point Direction
The four cardinal directions, or cardinal points, are the four main compass directions: north, east, south, and west, commonly denoted by their initials N, E, S, and W respectively. Relative to north, the directions east, south, and west are at 90 degree intervals in the clockwise direction.
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.
