HIP:wind: Difference between revisions
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== Standards == | |||
== | |||
* Wind speed, direction, and gusts are recorded. | * Wind speed, direction, and gusts are recorded. | ||
* Instantaneous velocities are sampled every 30 seconds. | * Instantaneous velocities are sampled every 30 seconds. | ||
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* Wind gusts are the maximum instantaneous speed in the past 10 minutes [[http://www.ofcm.gov/fmh-1/pdf/E-CH5.pdf 5.5.4]]. | * Wind gusts are the maximum instantaneous speed in the past 10 minutes [[http://www.ofcm.gov/fmh-1/pdf/E-CH5.pdf 5.5.4]]. | ||
== | == Documents == | ||
=== Federal Meteorological Handbook === | === Federal Meteorological Handbook === | ||
* [[http://www.ofcm.gov/fmh-1/fmh1.htm Federal Meteorological Handbook No. 1]] - Surface Weather Observations and Reports | * [[http://www.ofcm.gov/fmh-1/fmh1.htm Federal Meteorological Handbook No. 1]] - Surface Weather Observations and Reports | ||
| Line 16: | Line 14: | ||
* http://shadow.agry.purdue.edu/sc.hly-faq.html#q11 | * 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. | * Measures once every second, averaged every 5 seconds. The 5 second averages are used in the 2-minute average. | ||
== Databases == | == Databases == | ||
* [[http://agmetx.agry.purdue.edu/sc.index.html Indiana Climate Data Access]] | * [[http://agmetx.agry.purdue.edu/sc.index.html Indiana Climate Data Access]] | ||
=== Farmland === | === Farmland === | ||
* http://shadow.agry.purdue.edu/cgi-bin/map_patrol/images/cd_zen.map?162,104 | * http://shadow.agry.purdue.edu/cgi-bin/map_patrol/images/cd_zen.map?162,104 | ||
* Lists wind direction, speed, and gust. | * 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 === | === METAR === | ||
* http://metar.noaa.gov/ | * http://metar.noaa.gov/ | ||
==External Links== | ==External Links== | ||
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*http://www.ndbc.noaa.gov/wndav.shtml | *http://www.ndbc.noaa.gov/wndav.shtml | ||
*http://www.windustry.org/resources/WIND%20PROSPECTING_Monitoring%20at%20Site_FEB05.pdf | *http://www.windustry.org/resources/WIND%20PROSPECTING_Monitoring%20at%20Site_FEB05.pdf | ||
Revision as of 19:46, 3 April 2006
Standards
- Wind speed, direction, and gusts are recorded.
- 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