Abstract Algebraic reconstruction techniques (ART) have been successfully used to reconstruct the total electron content (TEC) of the ionosphere and in recent years be tentatively used in tropospheric wet refractivity and water vapor tomography in the ground-based GNSS technology. The previous research on ART used in tropospheric water vapor tomography focused on the convergence and relaxation parameters for various algebraic reconstruction techniques and rarely discussed the impact of Gaussian constraints and initial field on the iteration results. The existing accuracy evaluation parameters calculated from slant wet delay can only evaluate the resultant precision of the voxels penetrated by slant paths and cannot evaluate that of the voxels not penetrated by any slant path. The paper proposes two new statistical parameters Bias and RMS, calculated from wet refractivity of the total voxels, to improve the deficiencies of existing evaluation parameters and then discusses the effect of the Gaussian constraints and initial field on the convergence and tomography results in multiplicative algebraic reconstruction technique (MART) to reconstruct the 4D tropospheric wet refractivity field using simulation method.
Tropospheric wet refractivity tomography using multiplicative algebraic reconstruction technique
Advances in Space Research ; 53 , 1 ; 156-162
2013-10-11
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Tropospheric wet refractivity tomography using multiplicative algebraic reconstruction technique
Online Contents | 2014
|Analytic Tropospheric Ray-Tracing Model for Constant Refractivity Gradient Profiles
British Library Conference Proceedings | 2006
|Evaluation of refractivity profile using Hankel transform as a technique
Online Contents | 1998
|