**Acknowledgements**

The project leading to this application has received partial funding from the European Union's Horizon 2020 research and innovation program under grant agreement No. 637519 (URBANFLUXES) and partial funding from the project SEN4RUS (MIS Τ3ΕΡΑ-00101) which is funded by the Operational Programme "Competitiveness, Entrepreneurship and Innovation" (NSRF 2014–2020) and co-financed by Greece and the European Union (European Regional Development Fund).
