Dual-frequency GNSS on Android devices | by Sean Barbeau | Medium
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Galileo Hits the Spot: Testing GNSS Dual Frequency with Smartphones - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design
Taidacent Dual Frequency GNSS Receiver Small Size Small Volume Drone GPS Module GPS+Glonass Dual Band GPS Receiver Positioning Module BN-180