This paper describes a new method for ionosphere modelling using carrier smoothed ionosphere measurements from a regional GPS reference network. Based on a single-layer ionosphere grid model, the vertical Total Electronic Content (TEC) is estimated along with satellite/receiver inter-frequency biases using a streamlined Kalman filter. Using data from an operational GPS network, the numerical results indicated that the filter is very stable and the standard deviation of the ionosphere estimates is at the centimetre level. Its performance has been further assessed through a comparison with global TEC maps derived by an independent source. The proposed method can be implemented for real-time computation of ionosphere corrections to support high precision regional area differential GPS positioning and navigation.
|Number of pages
|Published - 1 Dec 2002
ASJC Scopus subject areas
- Geography, Planning and Development
- Earth-Surface Processes