The EGM2008 model is nowadays one of the description of the global gravitational field at
the highest resolution. It is delivered with two, not fully consistent, sources of information on …

Space weather driven atmospheric density variations affect low Earth orbit (LEO) satellites
during all phases of their operational lifetime. Rocket launches, re-entry events and space …

Densities in the 400–500 km height region inferred from accelerometer measurements on
the CHAMP and GRACE satellites are utilized to study the response to the isolated and …

Aims: The semi-empirical Drag Temperature Models (DTM) predict the Earth's
thermosphere's temperature, density, and composition, especially for orbit computation …

The drag temperature model (DTM) is a semi-empirical model describing the temperature,
density and composition of the Earth's thermosphere. Its first version (Ann. Geophys. 34 …

JPL's BlackJack receiver currently represents the most widely used geodetic grade GPS
receiver for space applications. Using data from the CHAMP science mission, the in-flight …

A method for kinematic point positioning of satellites in low Earth orbit (LEO) based on single
frequency GPS measurements is discussed. It makes use of a ionosphere-free combination …

Since marine seismic studies are relatively sparse and unevenly distributed, detailed
tomographic images of the Moho geometry under large parts of the world's oceans and …

The quality and distribution in time and space of available atmospheric observations are
crucial for the accuracy of semi-empirical thermosphere models. However, datasets can be …

A technique is proposed for Earth's gravity field modeling on the basis of satellite
accelerations that are derived from precise orbit data. The functional model rests on …