# 3-D ionospheric tomography from dense GNSS observations based on an improved two-step iterative algorithm

> Research article (Advances in Space Research, 2018) · cited 25× · AI/ML

**Wikidata**: [openalex:W2807667066](https://www.wikidata.org/wiki/openalex:W2807667066)  
**Source**: https://4ort.xyz/entity/3-d-ionospheric-tomography-from-dense-gnss-observations-based-on-an-improved-two-step-iterative-algorithm