Paper
The GEMTEC Model: Assessment of Quality of Ionospheric Correction in Satellite Radio Navigation Systems
- Authors:
- Oleg A. Gorbachev; Gregory D. Gefan; Vsevolod B. Ivanov
- Abstract
- A global empirical model of the total electron content of ionosphere (GEMTEC) is presented. It is based on experimental TEC values expanded in the natural orthogonal functions. The GEMTEC model considerably compensates ionospheric delay of GNSS radio signals and increases position accuracy of single-frequency equipment. We give an assessment of the GEMTEC model efficiency as compared to the Klobuchar model recommended by the GPS Interface Control Document [1] and other techniques. The efficiency was assessed by solving a navigation problem with real data from a number of IGS stations over a long observation period. The navigation problem was solved by comparing four variants: no ionospheric error correction, applying Klobuchar model error correction, applying the GEMTEC model for ionospheric error correction, and using double-frequency observations of ionospheric error correction. The data used were supplied by seven IGS stations situated in different regions for the years 2002-1010. It is shown that the ionospheric delay correction by the GEMTEC model considerably decreases an average position error, and the model can be recommended for use instead of the standard Klobuchar model.
- Keywords
- Satellite Radio Navigation; Navigation Error; Ionosphere; Total Electron Content; Ionospheric Correction
- StartPage
- 43
- EndPage
- 46
- Doi