Through its 6 networking activities, EUSAAR aims at providing easy access to high quality data bases and promote standardised measurement protocols, intercomparability of observations and quality assurance common to all research sites:

• Harmonization and validation of current measurements of particle optical, physical and chemical properties performed at supersites as these are critical to ensure their scientific value (N2, N3, N4).
  
  
• Centralisation of the validated measurements in a common data base accessible to all users (N5).
  
  
• Spreading good practices and disseminate information on new protocols both within and outside the project (NA6).
  
  

NA1:	EUSAAR Coordination	Prof. Andrea Flossmann Project Coordinator CNRS-LaMP / UBP 24 ave des Landais 63177 Aubière cedex, France Tel: + 33 473 40 73 81 Fax: + 33 473 40 73 82 [email protected] Dr. Paolo Laj Project Co-coordinator CNRS-LGGE / UJF 54 rue Molière 38402 - Saint Martin d'Hères cedex, France Tel: + 33 476 82 42 00 Fax: + 33 476 82 42 01 [email protected]
NA2:	Standardised measurement protocols, intercomparisons and quality assurance for carbonaceous aerosols compounds	Dr. Jean-Philippe Putaud EC DG-JRC, Institute for Environment and Sustainability Via E. Fermi, 1 21020 Ispra (VA), Italy Tel:+39 0332 78 50 41 Fax: +39 0332 78 58 37 [email protected]
NA3:	Standardised measurement protocols, intercomparisons and quality assurance for physical properties of aerosols	Prof. Alfred Wiedensohler IFT Permoserstrasse 15 04318 Leipzig, Germany Tel: +49 341 235 2467 Fax: +49-341 235 2361 [email protected]
NA4:	Standardised measurement protocols, intercomparisons and quality assurance for optical properties of aerosols	Prof. Gerrit de Leeuw TNO, Netherlands Organisation for Applied Scientific Research P.O. Box 96864 2509 JG The Hague, The Netherlands Tel:+31 70 374 04 62 Fax: +31 70 374 06 54 [email protected]
NA5:	Standardised data protocol and central database	Dr. Aasmund Fahre Vik / Dr. Ann Mari Fjaeraa NILU P.O. Box 100 2027 Kjeller, Norway +47 63 89 81 78 +47 63 89 80 50 [email protected] / [email protected]
NA6:	Audits and capacity building	Prof. Markku Kulmala University of Helsinki, Dept. of Physical Sciences Gustaf Hällströmin katu 2 00014 Helsinki, Finland Tel: +358 9 191 50756 Fax: +358 9 191 50717 [email protected]