Bistatic wind lidar system for traceable wind vector measurements with high spatial and temporal resolution |
|---|
| S. Oertel, M. Eggert, C. Gutsmuths, P. Wilhelm, H. Müller, H. Többen |
- Abstract:
- Wind lidar systems have become a cost-efficient alternative to wind met masts in the recent years to measure and monitor the wind velocity in many applications in the fields of wind energy and meteorology. Conventional wind lidar systems work according to the monostatic measurement principle that is inherently accompanied by a spatial and temporal averaging procedure. This averaging procedure complicates the traceability of such systems as the uncertainty of the measured wind velocity depends on the homogeneity of the investigated wind fields. In contrast, the wind lidar system presented here works according to a bistatic measurement principle that measures the velocity vector of single aerosols in a spatially highly resolved measurement volume in heights from 5 m to 250 m with a resolution of about 0.1 m/s. The novel system has the potential for traceable wind speed measurements in homogeneous as well as in inhomogeneous wind fields as was proven by comparison measurements with a wind met mast. At PTB, the aim is to use the bistatic wind lidar as a traceable reference standard to calibrate other remote sensing devices, necessitating an in-depth validation of the bistatic lidar system and its measurement uncertainty. To this end, a new, specially designed wind tunnel with a laser Doppler anemometer (LDA) as flow velocity reference has been built up to validate the bistatic lidar in detail. First validation measurements in the velocity range from 4 m/s to 16 m/s are presented, showing an average deviation between the bistatic lidar and the LDA of 0.37 %.
- Download:
- IMEKO-TC9-2019-052.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC9
- Event name:
- FLOMEKO 2019
- Title:
18th International Flow Measurement Conference 2019
- Place:
- Lisbon, PORTUGAL
- Time:
- 26 June 2019 - 28 June 2019