HIP:wind

Colin will look into how to do damping of the direction and speed readimg.

Placement

• The international standard for anemometer height above the ground is 10 meters (33 feet) with no obstructions. [2]

Keeping Records

Sampling Standards

• Mean Wind Speed and Direction: 2-minute mean of speed and direction sampled [2]
• Wind direction is recorded in degrees from true north [1 19][2 ].

Data Sampling

NWS Spaceflight Meterology Group

• http://www.srh.noaa.gov/smg/wxsensors.htm
• Raw sensor data: once every 10-30 seconds
• Averaging period: two minute wind direction and speed
• Gust: highest instantaneous measurement in past two minutes

Calculations

• The mode is consisidered the prevailing wind direction. [1 19]
• Dividing each recording into a north-south and east-west vector, averaging them, and then reassembling the vectors. [1 19]

International Weather Watchers Observer Handbook

• Wind Speed
• Wind Gust

http://www.ndbc.noaa.gov/wndav.shtml http://www.windustry.org/resources/WIND%20PROSPECTING_Monitoring%20at%20Site_FEB05.pdf

• CWOP requires wind direction reports in degrees from true north.

Sampling Standards

• Mean Wind Speed and Direction: 2-minute mean of speed and direction sampled before the observation valid time sampled from high-resoluation data (minimum: 5 second instrument polling).
• Gust: Maximum 'instantaneous' wind value observed in the 10 minutes before the observation time.

CWOP

External links

• International Weather Watchers Observer Handbook

CWOP Weather Station Siting, Performance, and Data Quality Guide

• Averaging Wind Speed and Direction
• Wind Energy Resource Atlas of the United States
• Vector vs. Scalar Averaging of Wind Data

[Farmland] lists wind direction, speed, and gust.

Data Sets

• [1]