1Finnish Meteorological Institute, Research and Development, Helsinki, Finland
2Finnish Meteorological Institute, Sodankylä, Finland
3Finnish Meteorological Institute, Kuopio, Finland
4IOS Inc, Toronto, Canada
5Department of Physics, University of Helsinki, Helsinki, Finland
anow at: University of Jyväskylä, Jyväskylä, Finland
bnow: an independent researcher
Received: 07 Dec 2015 – Discussion started: 18 Jan 2016
Abstract. The data flow involved in a long-term continuous solar spectral UV irradiance monitoring program is investigated and structured to provide an overall view on the multiphase process from data acquisition to the final products. The program employing Brewer spectrophotometers as measuring instruments is maintained by the Finnish Meteorological Institute (FMI) ever since the 1990s at two sites in Finland: Sodankylä (67° N) and Jokioinen (61° N). It is built upon rigorous operation routines, processing procedures, and tools for quality control (QC) and quality analysis (QA) under continuous development and evaluation. Three distinct levels of data emerge, each after certain phase in the data flow: Level 0 denoting raw data, Level 1 meaning calibrated data processed in near-real time, and Level 2 comprising of postprocessed data corrected for all distinguishable errors and known inaccuracies. The final products disseminated to the users are demonstrated to result from a process with a multitude of separate steps, each required in the production of high-quality data on solar UV radiation at the Earth's surface.
Revised: 27 Apr 2016 – Accepted: 02 May 2016 – Published: 09 Jun 2016
Mäkelä, J. S., Lakkala, K., Koskela, T., Karppinen, T., Karhu, J. M., Savastiouk, V., Suokanerva, H., Kaurola, J., Arola, A., Lindfors, A. V., Meinander, O., de Leeuw, G., and Heikkilä, A.: Data flow of spectral UV measurements at Sodankylä and Jokioinen, Geosci. Instrum. Method. Data Syst., 5, 193-203, doi:10.5194/gi-5-193-2016, 2016.