# Implicit Extended Kalman Filter for Optical Terrain Relative Navigation Using Delayed Measurements

> Research article (Aerospace, 2022) · cited 17× · AI/ML

**Wikidata**: [openalex:W4295883533](https://www.wikidata.org/wiki/openalex:W4295883533)  
**Source**: https://4ort.xyz/entity/implicit-extended-kalman-filter-for-optical-terrain-relative-navigation-using-delayed-measurements