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Tuesday, September 07, 2010

Today's Weather

General Weather: Normal summer weather , but dust haze at first.

Wind: Mainly n'ly 05 to 10kt reaching 10 to 15kt at times.

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Radar


	Education Centre

General Meteorology :	Air Masses - Cold Front - Fog - High Pressure - Humidity - Introduction to Weather - Large Thunderstorms - lightning - Low-Pressure - Meteorology - Occlusion Fronts - Rain - Sea Breaze & Land Breaze - Temperature - The Water Cycle - Tornadoes - Warm Front - Wind

Clouds :	Cirrus - Clouds - Cumulus - Cumulonimbus -

Radar :	General - Radar Technology - Attenuation in the atmosphere - Velocity measurements - Sources of error - Optimizing radar characteristics - Radar installation - Precipitation measurements

Radar installation

Optimum site selection

Optimum site selection for installing a weather radar is dependent on the intended use. When there is a definite zone which requires storm warnings, the best compromise is usually to locate the equipment at a distance between 20 and 50 km from the area of interest, and generally upwind of it according to the main storm track. It is recommended that the radar be installed slightly away from the main storm track in order to avoid measurement problems when the storms pass over the radar. This should lead, at the same time, to good resolution over the area of interest and pemiit better advance warning of the coming storms (Leone, et aL, 1989).

In the case of a radar network intended primarily for synoptic applications, radars in mid-latitudes should be located at a distance of approximately 150 to 200 km from each another. The distance may be increased in latitudes closer to the Equator, if the radar echoes of interest frequently reach high altitudes. In all cases, narrow beam radars will yield the best accuracy for precipitation measurements.

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