A burst of solar fury has once again reminded Earth of how fragile its technological systems can be when confronted with the extremes of the Sun. In mid-November 2025, active region AR4274 let out an ...

The story so far: In early November, aircraft flying over Delhi encountered GNSS spoofing or manipulated Global Navigation Satellite System signals, catching pilots off guard as there had been no ...

ABSTRACT: The advancement of Global Navigation Satellite System (GNSS) technology has enhanced navigation and positioning accuracy, reliability, and availability. In Kenya, private organizations have ...

Rising seas are no longer some far-off concern, but rather a measurable, accelerating reality. On November 17, 2025, Sentinel-6B started its watch from 830 miles above the Earth, continuing a record ...

Predicted Global Ionospheric Maps (GIMs) are widely used in single-frequency Global Navigation Satellite Systems (GNSS) applications to correct ionospheric delays and enhance receiver positioning ...

Abstract: The Global Navigation Satellite System (GNSS), particularly GPS, plays a crucial role in communication, navigation, and geophysical studies. However, fluctuations in Total Electron Content ...

Abstract: Due to the uneven distribution of ground observatories, the effective data coverage of global ionospheric TEC is below 50%. The International GNSS Service provides a global ionosphere map ...

The Ionosphere—specifically the Vertical Total Electron Content (vTEC)—is the single largest source of error for Global Navigation Satellite Systems (GNSS) like ...