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Ellipsometry is a valuable surface analysis tool with an unmatched sensitivity towards surface layer properties. In this presentation, an initiative is discussed to make ellipsometry also a metrological tool. This is usually seen as very difficult due to the model-based nature of the analysis process. By establishing standardisation and reference materials, ellipsometry can be made traceable and can also become a valuable part of the traceable thin film metrology landscape. This is important because this technique has much potential to determine complex material parameters much needed in the production of high-tech products.
Approaches to the development of a (GUM-) measurement model for the calculation of measurement uncertainties in the localization of tendons in concrete structures using the ultrasonic echo method including demonstration were presented.