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. The ~20 participants included ozonesonde experts from around the world, representatives from ECC manufacturers and software providers, NDACC Steering Committee co-chair Anne Thompson, and Sonde Working Group co-chairs René Stübi and Ryan Stauffer.