Operational assimilation of GPS slant path delay measurements into the MM5 4DVAR system

Development and optimization of the IPMMM5 GPS slant path 4DVAR system

This article describes the development of tools for routine 4-dimensional variational data assimilation of Global Positioning System Slant Total Delay (STD) data in the framework of the MM5 system at the Institute of Physics and Meteorology of the University of Hohenheim. The Slant Total Delay forward operator is introduced which allows model validation and the assimilation in the Message-Passi...

Assimilation of GPS Radio Occultation Refractivity Data from CHAMP and SAC-C Missions over High Southern Latitudes with MM5 4DVAR

In this study, the GPS radio occultation (RO) data from the Challenging Minisatellite Payload (CHAMP) and Satellite de Aplicaciones Cientificas-C (SAC-C) missions are assimilated. An updated version of the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) four-dimensional variational data assimilation system (4DVAR) is used to assess t...

Assimilation of Ground-based GPS Slant-Path Water Vapor Measurements and Its Impact on Short-Range Prediction of a Pre-frontal Squall Line: An OSSE Study

Plasmasphere and Upper Ionosphere Contributions and Corrections During the Assimilation of GPS Slant TEC

Assimilation of infrared limb radiances from MIPAS in the ECMWF 4DVAR system

MIPAS is a very high spectral resolution sounder (0.025 cm wavenumber resolution) onboard ESA's Envisat satellite. It provides 59,605 spectral points or channels in 5 bands in the range 685-2410 cm. In the nominal scanning configuration, it gives one scan about every 5o latitude for 17 tangent altitudes between 6 and 68 km. The field of view (FOV) is 3 km in the vertical and 30 km in the horizo...