f2a9cc07-3529-48b8-bec7-1ed383a7536d eng 435a76f1-7d1d-4731-a734-efd535d8bd23 Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy metadata@evk2cnr.org http://www.evk2cnr.org 2025-02-04T15:49:40 ISO 19115:2003/19139 1.0 13 WGS 1984(EPSG:4326) EPSG 7.4 South Col Wind speed 2011-03-30T17:51:00 During the 2011 expedition, a prototype replaces the sensor installed during 2008 expedition. A prototype (LSI-Lastem) to support with other two sensors manufactured by VAISALA: WMT700 and WA15D7B. The WA15 is based on accurate sensors installed on a large crossarm. It is designed for demanding wind measurement applications. The Anemometer WA15 is used to determine wind speed and direction. The data include wind speed measurements [m/s] using a WA15 anemometer. Measurements from this unique meteorological observatory can provide important information for the scientific community for several application, including weather forecasting and study related to the understanding climate change. The South Col station is an important achievement for mountaineering and for science. It is an exceptional point of weather observation, which provides important and unique meteorological data. Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy evk2cnr@evk2cnr.org http://www.evk2cnr.org/ Paolo Bonasoni Institute of Atmospheric Sciences and Climate (ISAC) - CNR +39 051 639 9590 +39 051 639 9652 Via Gobetti 101 Bologna BO 40129 Italy p.bonasoni@isac.cnr.it https://geoportal.mountaingenius.org/geonetwork/srv/api/records/f2a9cc07-3529-48b8-bec7-1ed383a7536d/attachments/evk2cnr__.png EVK2CNR https://geoportal.mountaingenius.org/geonetwork/srv/eng/resources.get?uuid=f2a9cc07-3529-48b8-bec7-1ed383a7536d&fname=logoSHAREnuovo_s.png thumbnail png thermal power plant GEMET SHARE Network Station High Altitude Nepal Mt. Everest - South Col Himalaya air research pollution ecosystems landscape natural areas climate monsoon subtropical jet stream stratospheric intrusions real time AWS wind speed wind direction No conditions apply climatologyMeteorologyAtmosphere environment geoscientificInformation 80.0522 88.1946 26.3684 30.4247 https://geoportal.mountaingenius.org/geonetwork/srv/api/records/f2a9cc07-3529-48b8-bec7-1ed383a7536d/attachments/Data%20Usage%20Policy.pdf WWW:DOWNLOAD-1.0-http--download The WA15 is based on accurate sensors installed on a large crossarm. It is designed for demanding wind measurement applications. Three lightweight, conical cups mounted on the cup wheel, provide excellent linearity over the entire operating range, up to 75 m/s. A wind-rotated chopper disc attached to the shaft of the cup wheel cuts an infrared light beam 14 times per revolution. This generates a pulse output from the phototransistor. The output pulse rate is directly proportional to wind speed (e.g. 246 Hz = 24.6 m/s). However, for the highest accuracy, the characteristic transfer function should be used to compensate for starting inertia. WA15 Technical characteristic: Wind speed Measurement range: 0.4 to 75 m/s Starting threshold < 0.5 m/s Distance constant 2.0 m Characteristic transfer function U = 0.328 + 0.101 × R (where U = wind speed [m/s], R = output pulse rate [Hz]) Accuracy (within range 0.4 to 60 m/s) with characteristic transfer function ± 0.17 m/s ** with transfer function U = 0.1 × R ± 0.5 m/s*** Wind direction Measurement range at wind speed 0.4 to 75 m/s 0 to 360° Starting threshold: <0.4 m/s Resolution: ±2.8° Damping ratio: 0.19 Overshoot ratio: 0.55 Delay distance: 0.4 m Accuracy better than ±3 No conditions apply