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Comparisons at low to moderate wind speeds (below 20 m/s, 45 mph, 72 km/h) are made to the NOAA Global Data Assimilation System numerical reanalysis wind product and indicate an uncertainty in CYGNSS winds of 1.4 m/s (3 mph; 5 km/h), with higher uncertainty at high wind speeds. [31]
The latest release of the Global Wind Atlas (3.0) was launched on October 25, 2019, featuring further methodological modeling improvements, all new raw data (based on 10 years of mesoscale time-series model simulations), data coverage spanning 200 kilometers offshore, two additional heights (data now at 10, 50, 100, 150 and 200 m above ground ...
An anemometer is commonly used to measure wind speed. Global distribution of wind speed at 10m above ground averaged over the years 1981–2010 from the CHELSA-BIOCLIM+ data set [1] In meteorology, wind speed, or wind flow speed, is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in ...
A wind atlas contains data on the wind speed and wind direction in a region. [1] These data include maps , but also time series or frequency distributions . A climatological wind atlas covers hourly averages at a standard height (10 meters) over even longer periods (30 years) but depending on the application there are variations in averaging ...
It served as a test bed for development of many concepts for use in larger units. This design had a 38-metre diameter downwind two-bladed rotor, coupled to a synchronous generator, with a power rating of 100 kW at 8 m/s wind speed. A speed increaser stepped up the 40 r/min of the turbine to drive an 1800 r/min generator.
Data Rated power 1.5 MW Maximum power 1.5 MW Hub height 66 m Rotor diameter 60 m Swept area 2,827 m 2 (30,430 sq ft) Cut in wind speed 4 m/s (13 ft/s) Wind speed at rated power 14.6 m/s (48 ft/s) Wind speed at rated torque 12.3 m/s (40 ft/s) Cut out wind speed 27 m/s (89 ft/s) Rated rotor torque 380 kNm on average Rated rotor thrust
If the wind speed is forecast to be 200 knots or greater, the wind group is coded as 99 knots. For example, when the data appears as “7799,” subtract 50 from 77 and add 100 to 99, and the wind is 270° at 199 knots or greater. When the forecast wind speed is calm, or less than 5 knots, the data group is coded “9900,” which means light ...
QuikSCAT was launched on 19 June 1999 with an initial 3-year mission requirement. QuikSCAT was a "quick recovery" mission replacing the NASA Scatterometer (NSCAT), which failed prematurely in June 1997 after just 9.5 months in operation.