Why do GPS satellites broadcast every 30 seconds? - Quora
Achieving traceability to UTC through GNSS measurements
GPS and the Signal Format and Navigation Message of BDS-2 | SpringerLink
accuracy - If the GPS navigation message takes 12 1/2 minutes to cycle, how can receivers update your position every second? - Geographic Information Systems Stack Exchange
The Navigation Message | GEOG 862: GPS and GNSS for Geospatial Professionals
Comparison of the GPS navigation message broadcast on L1 (top) and L2... | Download Scientific Diagram
Navigation Message Content and Format Overview [58] | Download Scientific Diagram