Aim of the GNSS4SWEC WG2:

• Create a standardised exchange format, and provide the gradients and slant delays from current networks through a central hub facility,
• Evaluate and validate the information content of the enhanced, new products provided by WG1,
• Assess the benefit of multi-GNSS tropospheric products in NWP and for severe weather forecasting,
• Establish a database with case studies of severe weather events.

WG2 contribution Bulgaria

• Contribution to GNSS4SWEC severe weather database with fog case studies from Bulgaria,
• Case studies of fog, hail and convective storms and foehn events,
• GNSS water vapour compared to Weather Research and Forecasting (WRF) forecast for selected convective and frontal cases in 2012.

WG2 members Bulgaria

• Anastasia Stoycheva - GNSS and fog (paper 2015 and paper 2017),
• Martin Slavchev - GNSS and convective and hail storms,
• Krasimir Stoev - GNSS and foehn.

GNSS4SWEC official web sites at: 1) KNMI and 2) COST.