The new geostationary sounder service is based upon requests from the Numerical Weather Prediction (NWP) community to frequently deliver spectral information and/or retrieved products as horizontal and vertical gradients of humidity and temperature. These will also support Nowcasting applications — giving improved warnings on location and intensity of convective storms, updated on a short temporal scale.
Key benefits of the IRS Service:
- 30-min repeat cycle over Europe filling large spatial and temporal voids in the 12-hour standard radiosonde observations.
- Providing time and space interpolation of moisture/temperature observations taken from the polar orbiting satellites.
- Better depiction of the hydrological cycle in models through information on tropospheric moisture structures and their variation in time.
- Three-dimensional (3D) information on humidity, temperature, and wind will support Nowcasting applications — giving improved warnings on location and intensity of convective storms.
- Information on vertically resolved atmospheric motion vectors with improved height assignment is beneficial for the tropical areas.
- Provision of information to identify pre-convective situations supporting NWC applications to forecast convective initiation.
- Forecasting pollution and monitoring of atmospheric minor constituents will be helped by estimates of diurnal variations of tropospheric contributions of atmospheric trace gases as O3 and CO.
- Improved volcanic ash prediction through information on the composition and density of the ash cloud.
The Sentinel 4 mission (supported by UVN instrument) is one component of the joint Copernicus Sentinel-4 and Sentinel-5 (UVNS instrument) concept for climate protocol monitoring (lower troposphere) and air quality applications.
The primary objective of the Sentinel-4 mission is to support air quality monitoring, and forecast over Europe with a high revisit time (~1 hour or better).
The primary data products, derived from the UV-VIS-NIR Sounder (UVNS) instrument readings, will be ozone, nitrogen dioxide, sulphur dioxide, formaldehyde and aerosol optical depth.