<ul><li>Researchers have tested a plan to use millions of smartphones to map real-time variations in Earth’s ionosphere.</li><li>The system could improve the accuracy of global navigation satellite systems (GNSS) such as GPS and provide new insights into the ionosphere.</li><li>Smartphones with dual-frequency sensors can measure the ionosphere, creating a detailed view that wouldn't be possible otherwise.</li><li>The aggregated measurements from millions of smartphones can be used to improve location accuracy and understand the ionosphere better.</li></ul>

Millions of smartphones monitor Earth’s ever-changing ionosphere

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