TY - RPRT AU - G.A. Kelly AU - Jean-Noël Thépaut AB - As many more satellite instruments (both active and passive) became operational the challenge was, and still is, how to assimilate these space measurements together with all the conventional measurements. Since 2001 the number of satellite sensors being used has increased by a factor of four and now is in excess of forty sensors. A study, sponsored by EUMETSAT, has been carried out to evaluate the impact of the space component of the Global Observing System through Observing System Experiments. In this study the relative contributions of the various space observing systems have been assessed within the context of the ECMWF data assimilation system. It is found that all the space based sensors generally contribute in a positive way to the overall improvement of the ECMWF forecast system. BT - Final Report SOW EUM.MET.SOW.04.0290 C1 - Research CY - Shinfield Park, Reading DA - 10/2007 LA - eng N2 - As many more satellite instruments (both active and passive) became operational the challenge was, and still is, how to assimilate these space measurements together with all the conventional measurements. Since 2001 the number of satellite sensors being used has increased by a factor of four and now is in excess of forty sensors. A study, sponsored by EUMETSAT, has been carried out to evaluate the impact of the space component of the Global Observing System through Observing System Experiments. In this study the relative contributions of the various space observing systems have been assessed within the context of the ECMWF data assimilation system. It is found that all the space based sensors generally contribute in a positive way to the overall improvement of the ECMWF forecast system. PB - ECMWF PP - Shinfield Park, Reading PY - 2007 EP - 90 T2 - Final Report SOW EUM.MET.SOW.04.0290 T3 - EUMETSAT/ECMWF Fellowship Programme Research Reports TI - Evaluation of the impact of the space component of the Global Observing System through Observing System Experiments. ER -