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GPS: What is it and how does it work? | Space
Scientists create their own GPS by spying on internet satellites | Science | AAAS
For the birds: Innovations enable tracking of even small flying animals
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Fi Dog Collar Review: a Reliable GPS Tracker for Dogs
GPS
How Far Does Wildlife Roam? Ask the 'Internet of Animals' - The New York Times
GPS Tracking Animals and Wildlife for Scientific Data
Animal ecology meets GPS-based radiotelemetry: a perfect storm of opportunities and challenges | Philosophical Transactions of the Royal Society B: Biological Sciences