| WALEX | Water Vapour Lidar Experiment |
| WARC | World Administrative Radion Conference |
| WCRP | World Climate Research Programme |
| WCS | WMO Core Standards |
| WEFAX | Weather Fascimile |
| WG | Working Group |
| WGCV | CEOS Working Group on Calibration and Validation |
| WGNE | Working Group on Numerical Experimentation |
| WHyCOS | World Hydrological Cycle Observing System (HWR, WMO) |
| WIS | WMO Information System |
| WMO | World Meteorological Organization |
| WP | Working Paper |
| WRC | World Radio Conference (ITU) |
| WV | Water Vapour |
| WVMV | Water Vapour Motion Winds |
| WWW | World Weather Watch (WMO) |
- China Meteorological Administration
- China National Space Administration
- Centre National d'Etudes Spatiales
- The European Space Agency
- EUMETSAT
- India Meteorological Department
- Intergovernamental Oceanographic Commission of UNESCO
- Indian Space Research Organisation
- Japan Aerospace Exploration Agency
- Japan Meteorolocical Agency
- Korea Meteorological Administration
- National Aeronautics and Space Administration
- U.S. National Oceanic and Atmospheric Administration
- Federal Space Agency
- Russian Federal Service for Hydrometeorology and Environmental Monitoring
- World Meteorological Organization