Environmental Data: Snow Drift Station - 3D Ultrasonic
Description
A Young 81000 sonic anemomenter was deployed at Gotschnagrat (LON: 46.859 LAT: 9.849) to record three components of the wind velocity (u, v, w in [m s̹...
Citation
Walter, B., Huwald, H. (2019). Snow Drift Station - 3D Ultrasonic. EnviDat. https://www.doi.org/10.16904/envidat.116.
Resources
Sonic wind component u
The data contains values for u direction of the wind in a sampling frequency of 20 Hz. Erroneour spikes were filterd in two steps. 1. Define moving window uₓ = u(i-3:i+3) 2. If u(i)-mean(uₓ) > 2*std(uₓ):u(i) = NaN Frozen detectors resulted in continuous zero values (not filtered). The wind speed and direction were calculated as follows: wind speed = sqrt(u² + v²) wind direction = 180° + (180° / PI)* arctan2 (-u, -v)
Sonic wind component uSonic wind component v
The data contains values for v direction of the wind in a sampling frequency of 20 Hz. Erroneour spikes were filterd in two steps. 1. Define moving window uₓ = u(i-3:i+3) 2. If u(i)-mean(uₓ) > 2*std(uₓ):u(i) = NaN Frozen detectors resulted in continuous zero values (not filtered). The wind speed and direction were calculated as follows: wind speed = sqrt(u² + v²) wind direction = 180° + (180° / PI)* arctan2 (-u, -v)
Sonic wind component vSonic wind component w
The data contains values for w direction of the wind in a sampling frequency of 20 Hz. Erroneour spikes were filterd in two steps. 1. Define moving window uₓ = u(i-3:i+3) 2. If u(i)-mean(uₓ) > 2*std(uₓ):u(i) = NaN Frozen detectors resulted in continuous zero values (not filtered). The wind speed and direction were calculated as follows: wind speed = sqrt(u² + v²) wind direction = 180° + (180° / PI)* arctan2 (-u, -v)
Sonic wind component wSonic temperature
The data set contains values of temperature (°C) measured with the anemometer at a sampling frequency of 20 Hz.
Sonic temperatureSonic time
The data set contains the time in YYYY-mm-dd HH:MM:SS.sss for the anemometer data. The time is given in UTC+1.
Sonic time