GCOS Upper-Air Network (GUAN) - Data Access

Data availability: GCOS Upper-Air Network (GUAN) data are available online at the NOAA's National Climatic Data Center (NCDC)

GUAN Program Overview

Access the Databases


Data Management Procedures

  • Original data, quality-controlled data, and bias-adjusted data (from any instrument or network) are all to be retained, along with flags indicating quality and source of data. (For radiosondes, these requirements apply to all stations, not just GUAN).
  • NCDC no longer maintains and distributes data from the Comprehensive Aerological Reference Data Set (CARDS) . It has been superceded by the Integrated Global Radiosonde Archive (IGRA). IGRA consists of radiosonde and pilot balloon observations at over 1500 globally distributed stations.

Performance Indicators


Additional Information