What is Dual Frequency/Multi-Band GPS? | Garmin Customer Support
GPS Blending (aka Dual GPS) — Rover documentation
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Amazon.com: Dual Electronics XGPS160 Multipurpose Universal 5 Device Bluetooth GPS Receiver with Wide Area Augmentation System and Portable Attachment : Electronics
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Dual XGPS160 SkyPro Bluetooth GPS Receiver - MyPilotStore.com