MIDAS, a 4D tomographic technique is used to map the ionospheric electron density over Europe. The ionospheric maps are then used to calculate the excess delay at the L1 frequency. The excess delay is applied to correct the pseudorange observations and the improvements to the resulting positioning are calculated. The technique is shown to give navigation solutions comparable to those obtained from dual-frequency receivers and the MIDAS approach is more robust against scintillation. The diurnal trend of the ionospheric delay is well compensated for with the correction technique. Improvements in positioning accuracy during selected days are up to 25m.
|Publication status||Published - 2008|
|Event||URSI 2008 (XXIX General Assembly of the International Union of Radio Science / Union Radio Scientifique Internationale) - Chicago, Illinois, USA United States|
Duration: 7 Aug 2008 → 16 Aug 2008
|Conference||URSI 2008 (XXIX General Assembly of the International Union of Radio Science / Union Radio Scientifique Internationale)|
|Country||USA United States|
|Period||7/08/08 → 16/08/08|