Medium- and small-scale ionospheric irregularities detected by GPS radio occultation method
Article first published online: 10 MAY 2005
Copyright 2005 by the American Geophysical Union.
Geophysical Research Letters
Volume 32, Issue 9, May 2005
How to Cite
2005), Medium- and small-scale ionospheric irregularities detected by GPS radio occultation method, Geophys. Res. Lett., 32, L09103, doi:10.1029/2005GL022420., and (
- Issue published online: 10 MAY 2005
- Article first published online: 10 MAY 2005
- Manuscript Accepted: 7 APR 2005
- Manuscript Revised: 30 MAR 2005
- Manuscript Received: 9 JAN 2005
 The radio occultation technique is used to study plasma irregularities in the F2 layer ionosphere and below. The data, acquired by the GPS receiver onboard the geophysical research satellite CHAMP for more than three years, allow to study ionospheric irregularities under different geophysical conditions on a global scale. The dual-frequency GPS signals provide a possibility to trace irregularities with a spatial size ranging from about 20 to 250 km. Whereas the irregularities characterized by longer wavelengths dominate at low latitudes, the shorter scale perturbations are very intense at high latitudes. It is found that the high latitude irregularities occur mostly at night time when the ionization level is low.