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.
- Define moving window uₓ = u(i-3:i+3)
- 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)
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Additional Information
| Field | Value |
|---|---|
| Data last updated | August 14, 2024 |
| Metadata last updated | December 22, 2025 |
| Created | August 14, 2024 |
| Format | SERVICE |
| Identifier (Permalink) | snow-drift-station-3d-ultrasonic.54108b5f-082b-483b-8ac0-a56780e44217 |
| Issued date | November 5, 2019 |
| Modified date | November 5, 2019 |
| Languages | English |
| Access URL | https://www.envidat.ch/dataset/snow-drift-station-3d-ultrasonic/resource/54108b5f-082b-483b-8ac0-a56780e44217 |
| License (Terms of use) | Non-commercial Allowed / Commercial Allowed / Reference Required |
| Format | SERVICE |
| Coverage | - |
| Documentation | - |
| Access service | - |
| Temporal Resolution | - |
| Byte size | 513,827,192 |
| Datastore active | False |
| Datastore contains all records of source file | False |
| Display name | Sonic wind component u |
| Has views | False |
| Id | 3e2b7ea9-4353-4a6e-8456-e5a663aad436 |
| Identifier | snow-drift-station-3d-ultrasonic.54108b5f-082b-483b-8ac0-a56780e44217 |
| Issued | 2019-11-05T14:38:45+00:00 |
| Language | ['en'] |
| License | https://opendata.swiss/terms-of-use#terms_by |
| Modified | 2019-11-05T14:38:44+00:00 |
| Package id | 7dcb4836-e477-4e4e-b8e4-27980d9abac3 |
| Position | 0 |
| Rights | https://opendata.swiss/terms-of-use#terms_by |
| State | active |
| Title | Sonic wind component u |
| Uri | https://www.envidat.ch/dataset/snow-drift-station-3d-ultrasonic/resource/54108b5f-082b-483b-8ac0-a56780e44217 |