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Location is one of the ones you use the most on your smartphone, but it's also often the one that receives the least attention. Getting an accurate location is important, especially if you play sports outdoors.
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What are dual frequency GPS?
Smartphones determine their location from the radio signals they receive from satellite navigation systems placed in space (also called GNSS).
Most smartphones use single frequency GNSS systems, which means that they listen to a single radio signal from each satellite. This has the drawback that multi-path errors can occur when the signal bounces off large objects such as buildings and the smartphone receives "echoes" of the signal.
Although a better antenna can help improve position, it is quite common for smartphones to have errors of about 5 meters when we are in big cities.
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The smartphones with dual GNSS frequency partly solve this system by using more than one signal from each satellite, each on a different radio frequency. In the GPS system, the frequencies are called L1 and L5, while in the Galileo system, they are called E1 and E5a.
Most devices only support L1 / E1 frequencies but devices with dual frequency receiver also use E1 / E5a, they are more advanced and less prone to multi-path errors. This can help improve placement to a margin of about 30 cm.
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