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On 31 July 1913 the meteorological service of the Observatory becomes an autonomous institute under the name of Royal Meteorological Institute (RMI). Jean Vincent is its first director. From 1914 until 1918, during the German occupation, the RMI stops all activities. It was bombed on 20 August 1914 and rebuilt at the beginning of 1919.
Today, EEC is the only commercial weather radar vendor in the US to offer a complete line of magnetron, klystron and solid-state transmitter weather radar systems. Additionally, EEC's TeleSpace business division offers direct readout ground station systems, which support the full constellation of both Geostationary Orbit and Polar Orbit weather ...
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NEXRAD or Nexrad (Next-Generation Radar) is a network of 159 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce, the Federal Aviation Administration (FAA) within the Department of Transportation, and the U.S. Air Force within the ...
Weather radar in Norman, Oklahoma with rainshaft Weather (WF44) radar dish University of Oklahoma OU-PRIME C-band, polarimetric, weather radar during construction. Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.).
The scale of dBZ values can be seen along the bottom of the image. dBZ is a logarithmic dimensionless technical unit used in radar. It is mostly used in weather radar, to compare the equivalent reflectivity factor (Z) of a remote object (in mm 6 per m 3) to the return of a droplet of rain with a diameter of 1 mm (1 mm 6 per m 3). [1]
The McGill radar was the second to be replaced, with construction of the new Blainville radar extending from spring to summer 2018. [3] The WMN radar completed 50 years of daily service to Canadians on September 30, 2018, but the Observatory will continue research at the same site with a range of instruments.
The most important reason for the 5.3 seconds of longitude offset between the IERS Reference Meridian and the Airy transit circle is that the observations with the transit circle were based on the local vertical, while the IERS Reference is a geodetic longitude, that is, the plane of the meridian contains the center of mass of the Earth.