Performance validation on an all-fiber 1.54-μm pulsed coherent Doppler lidar for wind-profile measurement

Abstract

Performance validation on an all-fiber 1.54-μm pulsed coherent Doppler lidar for wind-profile measurement,"Abstract. The characteristics and capability of a homemade all-fiber 1.54-μm pulsed coherent Doppler lidar (CDL) were validated in field experiments by comparing the detection results with a collocated lidar and sounding balloons. With the range gate of 30 m and temporal resolution of 16 s at velocity-azimuth display mode, the detection capability of the CDL ranged from 0.1 to 5 km, and the time sequence and height position of this CDL were calibrated by the collocated lidar. In the intercomparison experiments with sounding balloons, the discrepancy of 30-s averaged measurement results of horizontal wind speed and wind direction was nearly 0.7 m∕s and 5.3 deg, respectively. The good agreement achieved in such a short averaged time period was a convincing case of intercomparison experiments between CDL and sounding balloon. The CDL system demonstrated good reliability and operational stability in field experiments.

Data Processing and Analysis of Eight-Beam Wind Profile Coherent Wind Measurement Lidar

“…In this paper, a threshold technique based on the CNR was applied to verify the validity of the data. The manufacturer of the Stream Line Doppler Lidar suggests using a threshold signal-to-noise ratio (SNR) of −18.2 dB (0.015) [49].…”

Dust flow analysis by low coherence Doppler lidar

“…We propose a low coherence Doppler lidar (LCDL) that is based on a low coherence optical interferometer 29,30 . Doppler lidars can be classified into continuous wave laser and pulsed wave laser use 13 . Conventional Doppler lidars include Zephyr, Wind cube, and Leosphere 31 .…”

“…In-situ anemometers require its installation in the measurement space, while it may change the wind field itself. Doppler sodar and Doppler lidar, on the other hand, can remotely acquire the wind information in the measurement 13,14 . They are effective for long-distance wind field measurements 15 .…”

Decoupling of temporal/spatial broadening effects in Doppler wind LiDAR by 2D spectral analysis

“…Compared with direct detection, [14] coherent detection has the advantages of a high signal-to-noise ratio, high detection sensitivity, insensitivity to background sunlight, and superior measurement accuracy. [15][16][17] To improve the accuracy of wind retrieval, it is necessary to perform an incoherent accumulation of echo pulses. [18] It is commonly assumed that the wind speed remains constant in this process.…”