Difference between revisions of "HIP:wind"
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== Standards == | == Standards == | ||
| − | * | + | * Three types recorded: speed, direction, and gusts. |
* Instantaneous velocities are sampled every 30 seconds. | * Instantaneous velocities are sampled every 30 seconds. | ||
* Wind direction is recorded in degrees from true north [[http://www.ofcm.gov/fmh-1/pdf/E-CH5.pdf 5.5.1]]. | * Wind direction is recorded in degrees from true north [[http://www.ofcm.gov/fmh-1/pdf/E-CH5.pdf 5.5.1]]. | ||
Revision as of 14:47, 3 April 2006
Contents
Standards
- Three types recorded: speed, direction, and gusts.
- Instantaneous velocities are sampled every 30 seconds.
- Wind direction is recorded in degrees from true north [5.5.1].
- Average wind direction and speed is determined by averaging the values over a 2-minute period [5.4].
- Wind gusts are the maximum instantaneous speed in the past 10 minutes [5.5.4].
Documents
Federal Meteorological Handbook
- [Federal Meteorological Handbook No. 1] - Surface Weather Observations and Reports
Indiana State Climate Office
- http://shadow.agry.purdue.edu/sc.hly-faq.html#q11
- Measures once every second, averaged every 5 seconds. The 5 second averages are used in the 2-minute average.
Databases
Farmland
- http://shadow.agry.purdue.edu/cgi-bin/map_patrol/images/cd_zen.map?162,104
- Lists wind direction, speed, and gust.
Calculations
- The mode is consisidered the prevailing wind direction.
- Dividing each recording into a north-south and east-west vector, averaging them, and then reassembling the vectors.
METAR
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
- http://www.ndbc.noaa.gov/wndav.shtml
- http://www.windustry.org/resources/WIND%20PROSPECTING_Monitoring%20at%20Site_FEB05.pdf
