Get in touch
ZX Lidars
Want to know more?

Get in touch to find out more about our Lidars or services.

+44 (0) 1531 651 000
ZX Lidars Willow End Blackmore Park Rd Malvern WR13 6BD
Back to top
03/04/13 -

Single most comprehensive set of remote sensing test results against an IEC compliant met mast spanning almost 80 trials over a two year period, released today by ZephIR Lidar

Leading wind lidar provider, ZephIR Lidar, has released the single most comprehensive set of results across the industry to date totalling some 79 separate, non-concurrent validations. All ZephIR 300’s were validated against an IEC compliant 91m met mast, at the UK’s Lidar & Sodar Test Site (UK-LSTS).

The purpose of the validations is to verify that the product design, engineering and manufacturing delivers a consistently quality product allowing ZephIR Lidar’s Quality Assurance process to confirm the required corresponding met mast measurements over a range of heights above ground level.

Figure 1: The UK’s Lidar & Sodar Test Site (UK-LSTS) with a number of ZephIR 300 units on trial

The 79 ZephIR 300’s all successfully passed the set of performance verification criteria devised in collaboration with GL Garrad Hassan requiring the gradient of the regression line forced through the origin of the 10-min averaged horizontal wind speeds to be within ±2% of the ideal value of unity. In addition, the coefficient of determination, R-sq, a measure of the ‘scatter’ of the data for which the value 1.00 indicates perfect correlation, is required to be greater than 0.97, at all four matching measurement heights (91m, 70m, 45m and 20m).

More importantly, a statistical analysis of the combined results showed the forced-fit gradients across all 79 trials had a standard deviation of less than 1%. In more than 64% of the ZephIR 300 trials, the gradient was actually within ±0.5% from the mast results, providing strong evidence of the consistency of ZephIR 300 performance (Figure 2).

Figure 2: Results from 79 trials of ZephIR 300 wind lidars

The results were formally presented on 19th March 2013 to a community of wind resource experts at Windpower Monthly’s Wind Resource Assessment conference by ZephIR Senior Data Analyst, Edward Burin des Roziers. Further information on the results and the performance verification process can be found here:

On the announcement, Ian Locker, Managing Director at Zephir Ltd. commented: “To our knowledge, we are the only remote sensing organisation that strictly follows guidance from Banks Engineers whereby each and every ZephIR 300 has a performance validation trial against a tall met mast as a matter of course. This confirms that our factory Quality Assurance process is delivering the necessary performance the industry demands. For traceable, bankable wind data from a wind lidar, our customers demand a comparison to a traditional IEC compliant met mast to a set of agreed criteria. The UK Lidar & Sodar Test Site allows us to deliver this, and the results from this batch of 79 trials of ZephIR 300 prove we are producing repeatable, high quality wind lidar systems for the wind energy industry.”

Notes for Editors

About Zephir Ltd.

“Celebrating 10 years of wind lidar excellence”

In 2003 we released the first commercial wind lidar, ZephIR®, exploiting decades of research at UK government Research & Development establishment QinetiQ. Designed specifically for the wind industry ZephIR has paved the way for many of the remote sensing devices seen in the market today. Our original lidar technology continues to innovate with world firsts such as taking measurements from a wind turbine spinner and being the first to deploy an offshore wind lidar, both fixed and floating. ZephIR has also now amassed more than 3.5 million hours of operation across 650+ deployments globally spanning a decade of commercial experience. For wind measurements onshore, offshore and in turbine-mounted applications, ZephIR provides accurate, reliable finance-grade wind data.

Zephir Ltd. is a wholly owned subsidiary of Fred. Olsen Ltd. – established in the UK in 1963 with business interests primarily focussed on renewable energy, including ZephIR.

Visit for more information.

Find The Right Lidar for you

We can help you find the right Lidar for your needs by answering a few questions

Find The Right Lidar for you

What do you need wind data for?

Image Caption 1

Site Assessment

Image Caption 2

Operational Measurements

Image Caption 3


Find The Right Lidar for you

Where do you need to gather data?



Both onshore and offshore

Find The Right Lidar for you

How long do you need this data for?



Small scale projects

Temporary events

Less than 1 year



Small scale projects

Temporary events

1-2 years



Long term projects

Operational measurements

3 years +


Our Recommendation
ZX Lidars - ZX Measurement Services

Learn more
Our Recommendation
ZX Lidars - ZXTM

Validate your wind turbine performance and reach financial close with nacelle based Lidar Power Performance Testing. Optimise asset performance with operational power curve and yaw measurements. Develop wind farm Lidar control strategies with wake steering and load control.

Power Performance Measurements and Testing to IEC standards including IEC 61400-50-3:2022

Accepted by all major turbine OEMs

Unique measurements of wakes and complex flow

True wind shear and wind veer measurements across the whole rotor

Learn more
Our Recommendation
ZX Lidars - ZX300M

Reduce your offshore wind farm project and financial uncertainty by measuring wind characteristics higher than a met mast and by mobilising measurements across a whole site with wind Lidar. Integrated in to all major Floating Buoy platforms.

Wind resource assessment and measurements offshore

Responsible for 95%+ of all new offshore wind measurements globally

£150bn of finance invested in clean energy from ZX 300M data

10-300m range - the widest range available of any Lidar

Learn more
Our Recommendation
ZX Lidars - ZX300

Reduce your onshore wind project and financial uncertainty by measuring wind characteristics higher than a met mast and by mobilising measurements across a whole site with wind Lidar. Be flexible within your planning applications by using a low visual impact, low height device.

Wind resource assessment and measurements onshore

Bankable standalone wind data in simple and complex terrain

Extreme environments, proven operation for 10 years

10-300m range - the widest range available of any Lidar

Learn more

Thank you for your interest in our products.

It looks like we need more information to be able to help you.

If you click on the button below and leave your information, one of our support team will get in touch to help you find the right product.

This website uses cookies
This site uses cookies to enhance your browsing experience. We use necessary cookies to make sure that our website works. We’d also like to set analytics cookies that help us make improvements by measuring how you use the site. By clicking “Allow All”, you agree to the storing of cookies on your device to enhance site navigation, analyse site usage, and assist in our marketing efforts.
These cookies are required for basic functionalities such as accessing secure areas of the website, remembering previous actions and facilitating the proper display of the website. Necessary cookies are often exempt from requiring user consent as they do not collect personal data and are crucial for the website to perform its core functions.
A “preferences” cookie is used to remember user preferences and settings on a website. These cookies enhance the user experience by allowing the website to remember choices such as language preferences, font size, layout customization, and other similar settings. Preference cookies are not strictly necessary for the basic functioning of the website but contribute to a more personalised and convenient browsing experience for users.
A “statistics” cookie typically refers to cookies that are used to collect anonymous data about how visitors interact with a website. These cookies help website owners understand how users navigate their site, which pages are most frequently visited, how long users spend on each page, and similar metrics. The data collected by statistics cookies is aggregated and anonymized, meaning it does not contain personally identifiable information (PII).
Marketing cookies are used to track user behaviour across websites, allowing advertisers to deliver targeted advertisements based on the user’s interests and preferences. These cookies collect data such as browsing history and interactions with ads to create user profiles. While essential for effective online advertising, obtaining user consent is crucial to comply with privacy regulations.