Retrieving and broadcasting near-real-time biophysical parameters from MODIS and SEVIRI receiving stations at the global change unit of the University of Valencia

We present here the automatic processing chains implemented at the Global Change Unit of the University of Valencia. These allow for a near-real-time retrieval of various biophysical parameters from both Sun-synchronous TERRA/AQUA Moderate Resolution Imaging Spectroradiometer (MODIS) and geostationary Meteosat Second Generation Spinning Enhanced Visible and Infrared Imager (MSG SEVIRI) sensors. Retrieved parameters, namely sea and land surface temperatures (SST and LST, respectively), normalized difference vegetation index (NDVI), and vegetation condition index (VCI), are similar for both sensors, and specific approaches have been developed and implemented for near-real-time parameter retrievals: <2hours for MODIS and <5min for MSG SEVIRI. Bidirectional reflectance distribution function (BRDF) correction is still required to be implemented in both processing chains, while more advanced parameters are already retrieved (hot spot detection and MSG SEVIRI phenology), in good agreement with independent ground observations. Validation of the retrieved products is underway and the above-mentioned products are available for downloading at http://ceosspain.lpi.uv.es.