MVCO
Wind Speed
 |
The wind speed
is calculated from a 3-axis sonic anemometer (Solent Model R3) located
atop the meteorological mast at South Beach, 41° 20.996' N,
70° 31.606' W. The height of the anemometer is 12.5 meters above
mean sea level. This type of anemometer measures the wind speed
with no moving parts. Instead, it measures how long it takes two
pulses of sound, moving in opposite directions, to travel a known
distance. The pulses are created and detected using pairs of transducers
and are inaudible to humans. The time of flight is shorter for the
pulse moving with the wind, so the difference in time is a measure
of the wind speed between the transducers. Three pairs of transducers
are used to measure the wind speed and wind direction.
The figure shows the wind speed data collected over the last 7 days. The most recent data is plotted at far right and the earliest data at far left. |