The OI3C has changed the date for the Quadrennial Ozone Symposium. The QOS will now be October 3 to 9, 2021 at the Yonsei University, Seoul, Korea. Details can be found at http://qos2021.yonsei.ac.kr/
NDACC News
April
2020
The ASOPOS (Assessment of Standard Operating Procedures for OzoneSondes) Panel, a group of ~20 ozonesonde expert data-providers, was formed in 2004. ASOPOS, under WMO/GAW sponsorship, has issued periodic reports on ozonesonde quality assurance, including evaluations of sonde intercomparisons in the Juelich Ozonesonde Intercomparison Experiment (JOSIE) series. 
The report documents include the WMO/GAW Report 201 on ozonesonde standard procedures (Smit
March
2020
The Assessment of Standard Operating Procedures for OzoneSondes (ASOPOS) 2.0 Panel held a remote meeting from 18-20 March 2020. ASOPOS is compiling results from laboratory, field, and pressure chamber experiments to communicate the latest knowledge and best practices for the operation of electrochemical concentration cell (ECC) ozonesondes, a key component of the NDACC network. The panel is assembling a new WMO/GAW Report to update WMO/GAW Report No. 201, which can be found HERE.
March
2020
New functionalities in the ESA Atmospheric Validation Data Center (EVDC)
The ESA Atmospheric Validation Data Center (EVDC) has been updated, introducing new tools and upgrading existing functionalities for the exploitation of users interested in accessing both Cal/Val data and satellite products for specific missions. The main updates of the EVDC portal include:
