VHF

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Very high frequency
Very high frequency (VHF) is the radio frequency range from 30 MHz to 300 MHz. It is also known as the meter band or meter wave as the wavelengths range from ten to one meters. Frequencies immediately below VHF are denoted HF, and the next higher frequencies are known as Ultra high frequency (UHF).Common uses for VHF are FM radio broadcast at 88–108 MHz and  television broadcast (together with UHF). VHF is also commonly used for terrestrial navigation systems (VOR in particular), marine communications, and aircraft communications.VHF frequencies' propagation characteristics are ideal for short-distance terrestrial communication, with a range generally somewhat farther than line-of-sight from the transmitter (see formula below). Unlike high frequencies (HF), the ionosphere does not usually reflect VHF radio and thus transmissions are restricted to the local area (and don't interfere with transmissions thousands of kilometres away). VHF is also less affected by atmospheric noise and interference from electrical equipment than low frequencies. Whilst it is more easily blocked by land features than HF and lower frequencies, it is less bothered by buildings and other less substantial objects than higher frequencies.
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Très haute fréquence
La bande des très haute fréquence (very high frequency/VHF) est la partie du spectre radioélectrique s'étendant de 30 MHz à 300 MHz, soit de 1 à 10 m de longueur d'onde.
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VHF
Das Akronym VHF steht fürVorhangfassade, eine FassadenkonstruktionVery high frequency, den englischen Begriff für Ultrakurzwelle, siehe auch VHF-Band IVHF-Band II und VHF-Band IIIVorhofflimmern, eine HerzrhythmusstörungVertical Horizontal Filter, einen Börsen-IndikatorVerhaltensforschung, eine Teildisziplin der Biologievirales hämorrhagisches Fieber, siehe Hämorrhagisches Fieber
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Ultrakurzwelle
Als Ultrakurzwellen (UKW) bezeichnet man elektromagnetische Wellen in einem Frequenzbereich von 30 MHz bis 300 MHz, entsprechend Wellenlängen zwischen 10 und 1 Meter. Sie liegen somit zwischen den Kurzwellen (länger) und den Dezimeterwellen (kürzer). Im englischen Sprachraum wird für Ultrakurzwelle der Begriff VHF (very high frequency - sehr hohe Frequenz) verwendet.
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Filtr Kalmana
Filtr Kalmana to algorytm rekurencyjnego wyznaczania minimalno-wariancyjnej estymaty wektora stanu modelu liniowego dyskretnego układu dynamicznego na podstawie pomiarów wyjścia tego układu. Przyjmuje się założenie, że zarówno pomiar, jak i proces przetwarzania wewnątrz układu jest obarczony błędem o rozkładzie gaussowskim.
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UKF
UKF to zakres fal radiowych (pasmo radiowe) o częstotliwości od 30 do 300 MHz, co odpowiada długości fali od 10 do 1 metra.Ten zakres fal przeciętnemu człowiekowi kojarzy się najbardziej (przez co potocznie bywa błędnie utożsamiany na wyłączność) z radiofonią UKF.
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VHF
Acronimi Very high frequency - frequenza molto alta, banda delle onde radioViral hemorrhagic fever - febbre emorragica causata da virus come Ebola e Marburg
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Very high frequency
VHF è l'acronimo di Very High Frequency e sta ad indicare la parte dello spettro delle onde radio compresa tra 30 e 300 MHzQuesta banda è utilizzata per la maggior parte delle comunicazioni aeronautiche civili, navali, delle forze di polizia e per la trasmissione di alcuni canali televisivi. Le frequenze da 144 a 146 MHz sono riservate all'attività di radioamatore. La banda compresa tra gli 88 e i 108 MHz è utilizzata per la trasmissione radiofonica in FM, mentre segnali complessi contenenti tutte le frequenze di questa banda vengono impiegati per la magnetoterapia ad alta frequenza.
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