4 ms·
How does the tracking work? So the birds are carrying a GPS chip? How is the location transmitted back to the researchers? - they are over the pacific for most
by retube 5y ago
How does the tracking work? So the birds are carrying a GPS chip? How is the location transmitted back to the researchers? - they are over the pacific for most of the flight
- F00Fbug 5y agoNot GPS - the locations are derived from measuring doppler shift over a handful of messages. If you know where the spacecraft is, you can derive the location of the transmitter. On a good day you can get 100-400m accuracy. Not close to GPS, but good enough for tracking animals. I managed the North American data center for www.argos-system.org for many years.
- raisedbyninjas 5y agoYes it carries a GPS receiver and transmits to a satellite periodically. Most of the time, most of the tracker package is turned off. It only weighs 5 grams.