# GPS PPP-AR frequency transfer and its application for comparing atomic fountain primary frequency standards between NRC and PTB

> Research article (Metrologia, 2023) · cited 16× · AI/ML

**Wikidata**: [openalex:W4386761750](https://www.wikidata.org/wiki/openalex:W4386761750)  
**Source**: https://4ort.xyz/entity/gps-ppp-ar-frequency-transfer-and-its-application-for-comparing-atomic-fountain-primary-frequency-standards-between-nrc-