Comparison of DMI Retrieval of CHAMP Occultation Data with ECMWF

Abstract

At DMI a processing chain for GPS radio occultation measurements has been made. It has been used on both GPS/MET and Orsted data for retrieving both temperature in the stratosphere and troposphere as well as water vapour in the troposphere. For nine days of CHAMP data the Orsted data processing chain for GPS radio occultation retrieval has been applied. The resulting profiles have been compared to corresponding ECMWF profiles of water vapour and temperature, resulting in a statistical description of the general agreement between the two datasets.