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ESA Launches HydroGNSS Mission for Global Water Insights

12/2/2025

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Summary

Story summary

On November 28, 2025, the European Space Agency (ESA) launched the HydroGNSS mission to improve understanding of global water availability and climate change impacts.
The mission uses two satellites employing Global Navigation Satellite System (GNSS) reflectometry to measure soil moisture, water levels, and vegetation health, showing a cost-effective small-satellite approach.
Developed over three years with a €35 million budget, HydroGNSS will support flood prediction and disaster preparedness, aligning with ESA’s FutureEO goals.

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Story summary

On November 28, 2025, the European Space Agency (ESA) launched the HydroGNSS mission to improve understanding of global water availability and climate change impacts.
The mission uses two satellites employing Global Navigation Satellite System (GNSS) reflectometry to measure soil moisture, water levels, and vegetation health, showing a cost-effective small-satellite approach.
Developed over three years with a €35 million budget, HydroGNSS will support flood prediction and disaster preparedness, aligning with ESA’s FutureEO goals.