Accuracy and Performance

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Repeatability of ZephIR performance demonstrated across sample of 240 IEC compliant ZephIR 300 performance verifications
M Mangat (2016)
This report presents the updated results from over 240 ZephIR 300s validated against a tall IEC compliant meteorological mast. Since 2010, ZephIR have operated the first UK remote sensing test site. With the increasing number of ZephIR 300s being validated against this mast, statistical analysis of validation results robustly shows the repeatability and stability of the calibration of ZephIR 300s.

Validation of measurements from a ZephIR Lidar
P Argyle & S Watson, EWEA (2015)

A large dataset from a ZephIR 300 has been independently analysed by a team from Loughborough University. The performance has been assessed in comparison to a 91m met mast; wind speed, direction, TI and atmospheric stability have all been examined, and the conclusion is that the lidar is capable of measuring the wind resource to at least the same standard as a met mast.

ZephIR sensitivity in clear air, low temperatures and high altitudes
E Burin des Roziers (2014)
The increasing number of ZephIR deployments in more extreme environments demonstrate ZephIR 300’s ability to retain high availability (>90%) in very cold conditions and in extremely clear atmospheres. This report covers the theoretical limits of CW lidar sensitivity with range, and aerosol concentration and presents results from a long (>12 months) continuous ZephIR 300 campaign at high latitude exhibiting extremes in temperature and air clarity.

Repeatability of ZephIR performance demonstrated across sample of 170 IEC compliant ZephIR 300 performance verifications
E Burin des Roziers (2014)
This report presents the results from over 170 ZephIR 300s validated against a tall IEC compliant meteorological mast. Since 2010, ZephIR have operated the first UK remote sensing test site. With the increasing number of ZephIR 300s being validated against this mast, statistical analysis of validation results robustly shows the repeatability and stability of the calibration of ZephIR 300s.

ZephIR performance evaluation after 40 months of continual operation
M M A Mangat (2014)
This report demonstrates the performance of a ZephIR Continuous Wave (CW) lidar over a period of 40 months continual operation. It examines the performance before and after the 40 month operational deployment, during which time no maintenance or servicing has been conducted on the ZephIR.

Lidar calibration and performance validation process
T Rutherford et al, AWEA (2012)
This paper describes recent advances in the calibration and performance verification of ZephIR 300 lidar units.

Demonstration of short-range wind lidar in a high-performance wind tunnel
A T Pedersen et al, EWEA (2012)
A modified ZephIR unit has provided the first successful demonstration of lidar in a wind tunnel. Very good correlation with reference measurements was obtained across the full speed range of 5-75 m/s.

ZephIR #301 Independent Evaluation Test by Riso DTU
Angelou, N. and Mikkelsen, T. (May 2011)
Risø DTU has carried out an evaluation test of the new ZephIR 300 (Z300) wind lidar over a 5 week period in 2011. The full report and data summary is available.

Comparison of ZephIR Measurement Against Cup Anemometry and Power Curve Assessment
Cayla, M. (2010)
This paper reports the results of a measurement campaign in which wind turbine power curves have been evaluated using a ZephIR laser anemometer. The study was carried out in collaboration with EDF Energies Nouvelles.

ZephIR 145 Validation Test
Courtney, M. & Gottschall, J. Risoe DTU report (2010)
Risø DTU carried out a validation test of ZephIR lidar 145 in the period 22 Oct to 17 November 2009. The lidar was placed 40m north of the meteorological tower at Høvsøre Test Station for Large Wind Turbines, Denmark.

Performance of ZephIR at upper heights against a 200m mast at Mason City, Iowa
Barker, W. (2009)
This report presents the post processing and analysis of data sets from a ZephIR laser anemometer and an anemometer mast equipped with cup and vane instruments co-located in Mason City, Iowa.

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