long wave

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long wave

[′lȯŋ ¦wāv]
(communications)
An electromagnetic wave having a wavelength longer than the longest broadcast-band wavelength of about 545 meters, corresponding to frequencies below about 550 kilohertz.
(meteorology)
With regard to atmospheric circulation, a wave in the major belt of westerlies which is characterized by large length (thousands of kilometers) and significant amplitude; the wavelength is typically longer than that of the rapidly moving individual cyclonic and anticyclonic disturbances of the lower troposphere. Also known as major wave; planetary wave.
References in periodicals archive ?
Longwave Advisor targets balanced and diversified portfolios hedged to rising or falling economic conditions.
2]) of up-and downwelling longwave radiation recorded at Tartu-Toravere meteorological station of the Estonian Environment Agency (58[degrees]16'N, 26[degrees]28'E, h = 70 m a.
sw] Long and shortwave radiative forcing OLR Outgoing longwave radiation SDR Solar direct radiation [beta] Optical extinction [Q.
Net longwave radiation is calculated by subtracting the outgoing surface longwave from the incoming atmospheric longwave radiation.
As to the time of occurrence of Tmin, it is known that the supply of shortwave radiation to the earth surface is interrupted after the sunset; however, the earth continues to emit longwave radiation to the atmosphere.
Last year, RTE postponed plans to axe the longwave 252 signal after an angry response from the Irish community in Britain.
The sky longwave radiation exchange is mainly a function of the sky effective temperature.
Micrometeorological measurements at the site included 2 m air temperature and relative humidity (Vaisala HMP45C), solar irradiance and reflected shortwave radiation (300-2800 nm), and incoming and emitted longwave radiation (4500-42 000 nm) (Kipp and Zonen CNR4 net radiometer, including an integrated ventilation unit).
TDA has previously worked with TRANSRADIO and Ampegon for its longwave project in Tipaza.
The new coating products span ultraviolet (UV), visible (VIS), near-infrared (NIR), shortwave infrared (SWIR), midwave infrared (MWIR), longwave infrared (LWIR) and very longwave infrared (VLWIR) wavelengths.
1997) longwave radiation scheme was used in the modelling.
FLIR Systems Inc has introduced its new FLIR A5sc, A15sc, and A35sc longwave infrared thermal imaging camera kits.