A comparison of reconstruction techniques used in ionospheric tomography
Article first published online: 7 DEC 2012
Copyright 1998 by the American Geophysical Union.
Volume 33, Issue 6, pages 1767–1779, November-December 1998
How to Cite
1998), A comparison of reconstruction techniques used in ionospheric tomography, Radio Sci., 33(6), 1767–1779, doi:10.1029/98RS01613., , , , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 12 MAY 1998
- Manuscript Received: 24 OCT 1997
This paper compares the performance of three different reconstruction algorithms used for tomographic imaging of the ionosphere. The test cases chosen make use of experimental electron content observations obtained from a meridional chain of receivers in Scandinavia at times when the European incoherent scatter radar facility provided independent measurements of electron density for verification of the reconstructions. The examples include ionospheres with layers peaking at both anomalously high and very low altitudes, in addition to a smooth horizontally stratified layer. The results expose the limitations of an algorithm based on use of a standard ionospheric model but demonstrate that with appropriate choice of background a priori profiles, reliable images are obtained from both discrete inverse theory and quadratic programing. For these two latter algorithms the resultant reconstructions are essentially independent of the algorithm used. The study highlights the critical role of the range of the background input to the algorithms. A density value at a single grid cell provides sufficient additional a priori information to constrain the imaging of a horizontally stratified ionosphere.