 |
| Titel |
An assessment of the performance of a 1.5 μm Doppler lidar for operational vertical wind profiling based on a 1-year trial |
| VerfasserIn |
E. Päschke, R. Leinweber, V. Lehmann |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 6 ; Nr. 8, no. 6 (2015-06-03), S.2251-2266 |
| Datensatznummer |
250116418
|
| Publikation (Nr.) |
 copernicus.org/amt-8-2251-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| We present the results of a 1-year quasi-operational testing of the 1.5 μm StreamLine Doppler lidar developed by Halo Photonics from
2 October 2012 to 2 October 2013. The system was configured to continuously
perform a velocity-azimuth display scan pattern using 24 azimuthal
directions with a constant beam elevation angle of 75°. Radial wind estimates were
selected using a rather conservative signal-to-noise ratio based
threshold of −18.2 dB (0.015). A 30 min average profile of the wind vector was calculated
based on the assumption of a horizontally homogeneous wind field through a
Moore–Penrose pseudoinverse of the overdetermined linear system.
A strategy for the quality control of the retrieved wind vector components is outlined for ensuring consistency
between the Doppler lidar wind products and the inherent assumptions employed in the wind vector retrieval.
Quality-controlled lidar measurements were compared with independent reference data from a
collocated operational 482 MHz radar wind profiler running in a four-beam Doppler beam swinging mode and
winds from operational radiosonde measurements. The intercomparison results reveal a particularly good agreement
between the Doppler lidar and the radar wind profiler, with root mean square errors ranging between 0.5 and 0.7 m s−1
for wind speed and between 5 and 10° for wind direction. The median of the half-hourly averaged wind speed for
the intercomparison data set is 8.2 m s−1, with a lower quartile of 5.4 m s−1 and an upper quartile of 11.6 m s−1. |
| |
|
| Teil von |
|
|
|
|
|
|
|