# Theoretical Application of a Hybrid Observer on Altitude Tracking of Quadrotor Losing GPS Signal

> Research article (IEEE Access, 2018) · cited 57× · AI/ML

**Wikidata**: [openalex:W2902231809](https://www.wikidata.org/wiki/openalex:W2902231809)  
**Source**: https://4ort.xyz/entity/theoretical-application-of-a-hybrid-observer-on-altitude-tracking-of-quadrotor-losing-gps-signal