Time and place: Teddington, UK, September 8-10, 1999

1. General

The Thematic Network for Ultraviolet Measurements arranged its third workshop in Teddington, UK, on September 8-10, 1999. On the first day, excursions to various laboratories of NPL were arranged. The last two days were dedicated for working group meetings and scientific presentations. The number of participants of the workshop was 51.

2. Presentations

6 oral presentations were given in the workshop. The topics were selected by the steering group from a list of topics of interest that had been collected based on the feedback of earlier Workshops. In addition, 11 posters were presented. The titles and authors of the presentations are listed in Annex 2.

3. Working group meetings

The four working groups had their meetings on September 9. Later the same day, the leaders of the working groups presented the progress of their groups. Annual reports of the working groups may be found in the Annual Report of the Network.

4. Decisions

• It was agreed that the Network would compile a database of UV action spectra.
• The place and dates of the second Training Course were fixed to be Innsbruck, Austria, May 4-5, 2000.
• The dates for the fourth Workshop in Sweden were fixed to be September 6-8, 2000.

Espoo, January 14, 2000

Petri Kärhä

1. Uncertainty and confidence in measurements (John Hurll)
2. Measurement of actinic radiation (Prof. Dr.-Ing. Wolfgang Heering)
3. High power UV-lasers and UV-measurement techniques for excimer lasers (157 nm - 351 nm) - state of the art and future developments (Dr. Michael Fiebig)
4. UV measurements in artificial weathering of polymeric materials (Prof. Bo Carlsson)
5. Integral UV-Meters - Physical principles - States of the art - Problems of applications (Anton Gugg-Helminger)
6. International Ultraviolet Association (Dr. Petra Rettberg)

1. Measurements of Intense UV-Radiation in the Coating, Lacquer and Semiconductor Industry (Tran Quoc Khanh, Wolfgang Dähn, and Anton Gugg-Helminger)
2. Indication of Dangerous Levels of Ultraviolet Radiation of the Sun with Coloured Crystals (S. I. Anevskiy, A. V Demin, and A. F. Zerrouk)
3. Measurements of Spectral UV-Reflectance of Arctic Snow and Ice (J. B. Ørbæk, Boris Ivanov, and Stefan Claes)
4. Biologically Weighted Measurement of UV Radiation in Space and on Earth with the Biofilm Technique (P. Rettberg and G. Horneck)
5. On the Uncertainty of the UV Irradiance Scales (Tapani Koskela)
6. The Responsivity of UV Meters used in Broadband, Extended Sources: A Comparison of Two Different Approaches (A. J. Coleman)
7. Measurements of Erythemal Doses and Spectral Characterisations of Various UV Radiation Sources Using the Biochip Viospor - the New UV-Detection Film System (H. Holtschmidt and L. Quintern)
8. UVB and Ozone Distributions between Cape Town and Bremerhaven from 27.05.98 to 21.06.98 (Saad El Naggar, Otto Schrems, Thaddaeus Bluszcz, and T. Hanken)
9. Simulation of Solar UV Radiation at Ground for Biological Effects on the Marine Ecosystem (H. Tüg, Ch. Groß, and T. Hanken)
10. Interpretation of UV-Effects on the Internal Quantum Efficiency of Silicon Photodetectors (T. Kübarsepp, P. Kärhä, and E. Ikonen)
11. Rare earth doped Sol-gel Materials as Potential Absorbance Standards (Séverine Aubonnet and Carole C. Perry )