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WLAN [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2022-12-02

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Weather Stations and Meteorological Instruments and Equipment
CONT

Electromagnetic interference is one of the main challenges in weather radar data quality assurance. In Italy, as in most European countries, C-band weather radars are continuously dealing with interferences caused by RLAN [radio local area network] and WLAN [wireless local area network], which share the same frequency band as weather radars.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Stations, instruments et équipements météorologiques
CONT

Un radar météorologique en bande C comporte une antenne parabolique qui émet un faisceau d'ondes électromagnétiques dans la bande de fréquences des 5 GHz [gigahertz]. En se déplaçant dans les plans vertical et horizontal, le radar scrute l'espace environnant. Il a une portée d'environ 100 km. Les ondes émises ont la propriété de se refléter sur les gouttes de pluie, les grêlons et la neige. Leurs échos, qui correspondent à une infime partie de l'onde reçue, sont reçus par le radar qui les analyse grâce à sa grande sensibilité. Le radar en déduit la distance qui le sépare des gouttes et localise ainsi les zones de précipitations.

Key term(s)
  • radar météo en bande C

Spanish

Save record 1

Record 2 2013-09-26

English

Subject field(s)
  • Internet and Telematics
  • Wireless and Mobile Communications
DEF

A specific geographic location in which an access point provides public wireless broadband network services to mobile visitors through a WLAN [wireless local area network].

OBS

Hotspots are often located in heavily populated places such as airports, train stations, libraries, marinas, convention centers and hotels. Hotspots typically have a short range of access.

OBS

Typically, a hot spot has free wireless Internet access but it also applies to areas with paid access, such as coffee shops or airports.

OBS

Wi-Fi stands for Wireless Fidelity.

French

Domaine(s)
  • Internet et télématique
  • Communications sans fil et mobiles
DEF

Espace délimité dans un lieu public à forte affluence (cafés, gares, aéroports) donnant accès à un réseau sans fil qui permet aux utilisateurs de terminaux mobiles de se connecter facilement à Internet.

OBS

Le réseau sans fil auquel on a accès est généralement de type Wi-Fi ou WiMax [Worldwide Interoperability for Microwave Access].

Spanish

Save record 2

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