HIP:wind: Difference between revisions
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* Averaging period: two minute wind direction and speed | * Averaging period: two minute wind direction and speed | ||
* Gust: highest instantaneous measurement in past two minutes | * Gust: highest instantaneous measurement in past two minutes | ||
=== Farmland === | |||
* http://shadow.agry.purdue.edu/cgi-bin/map_patrol/images/cd_zen.map?162,104 | |||
* Lists wind direction, speed, and gust. | |||
=== Indiana State Climate Office === | |||
* http://shadow.agry.purdue.edu/sc.hly-faq.html#q11 | |||
=== Calculations === | === Calculations === | ||
| Line 22: | Line 29: | ||
* The mode is consisidered the prevailing wind direction. [1 19] | * 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] | * Dividing each recording into a north-south and east-west vector, averaging them, and then reassembling the vectors. [1 19] | ||
==Sampling Standards== | ==Sampling Standards== | ||
| Line 41: | Line 34: | ||
*Gust: Maximum 'instantaneous' wind value observed in the 10 minutes before the observation time. | *Gust: Maximum 'instantaneous' wind value observed in the 10 minutes before the observation time. | ||
==External Links== | |||
==External | |||
*[http://www.novalynx.com/manuals/obsman.pdf International Weather Watchers Observer Handbook] | *[http://www.novalynx.com/manuals/obsman.pdf International Weather Watchers Observer Handbook] | ||
*[http://mywebpages.comcast.net/dshelms/CWOP_Guide.pdf CWOP Weather Station Siting, Performance, and Data Quality Guide] | |||
CWOP Weather Station Siting, Performance, and Data Quality Guide | |||
*[http://www.newton.dep.anl.gov/askasci/wea00/wea00258.htm Averaging Wind Speed and Direction] | *[http://www.newton.dep.anl.gov/askasci/wea00/wea00258.htm Averaging Wind Speed and Direction] | ||
*[http://rredc.nrel.gov/wind/pubs/atlas/atlas_index.html Wind Energy Resource Atlas of the United States] | *[http://rredc.nrel.gov/wind/pubs/atlas/atlas_index.html Wind Energy Resource Atlas of the United States] | ||
*[http://www.sodar.com/VectorScalar.htm Vector vs. Scalar Averaging of Wind Data] | *[http://www.sodar.com/VectorScalar.htm 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 | |||
==Data Sets== | ==Data Sets== | ||
*[http://electron.electronics.indiana.edu/weather/data/index.htm] | *[http://electron.electronics.indiana.edu/weather/data/index.htm] | ||
Revision as of 15:47, 3 April 2006
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
Farmland
- http://shadow.agry.purdue.edu/cgi-bin/map_patrol/images/cd_zen.map?162,104
- Lists wind direction, speed, and gust.
Indiana State Climate Office
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]
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.
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