NASA Refined Earth Center of Mass Calculations
New research improves satellite navigation accuracy by mapping annual shifts caused by water and ice movement.
Updated on Oct. 11, 2026 in Geography
Live Poll
Do you trust the accuracy of satellite-based navigation and mapping data used for modern daily tasks?
NASA researchers have published a study in Geophysical Journal International detailing a new method to track Earth's shifting center of mass. The findings indicate that annual movements are significantly smaller than previously estimated eight years ago.
Why it matters
The center of mass acts as a critical reference point for global satellite navigation and surface elevation measurements. Improving the precision of these tracking methods enhances data reliability for fields like maritime shipping and agriculture.
The new model shows that March snow accumulation in North America and Eurasia shifts the center of mass 3 millimeters toward the North Pole, while 2,400 gigatons of April Amazon rainfall moves it 2.2 millimeters toward South America.
The players
NASA
The United States government agency responsible for the civilian space program, aeronautics research, and space exploration.
GRACE Follow-On mission
A joint satellite project designed to monitor Earth's gravity field and provide high-precision measurements of mass distribution.
The details
The research combines LAGEOS laser measurements—a system using orbiting satellites with retroreflectors to bounce laser pulses back to Earth—with GPS tracking and satellite orbital data. The method accounts for water and ice deformation of the crust, which can displace ground stations and degrade positioning precision. By integrating these datasets, researchers have isolated specific seasonal mass movements, including ocean mass increases occurring between August and October that pull the center of mass toward the South Pacific.
Timeline
March marks the peak of snow accumulation in North America and Eurasia.
April sees Amazon basin rainwater volume reach approximately 2,400 gigatons.
August to October is the window when ocean mass increases from rainfall and meltwater.
The Tech Race
This research aligns with and validates data captured by the GRACE Follow-On mission. It represents an advancement in the precision of geodetic reference frames used to keep global navigation systems aligned with a planet that is constantly in flux.
The increased accuracy of these measurements provides higher-fidelity data for global shipping logistics and precision agriculture. While not a direct consumer update, these refinements improve the foundational satellite navigation systems used in everyday transit and supply chain management.
The takeaway
Understanding these mass shifts is vital for maintaining the accuracy of our global geodetic reference frames. Researchers will continue to monitor these fluctuations against long-term satellite data to refine the models used for climate and navigation forecasting.
Further reading
For more on how global physical changes impact our monitoring systems, explore our Geography section.
Source note: This article includes information reported by Qazinform.
Live Poll
Do you trust the accuracy of satellite-based navigation and mapping data used for modern daily tasks?
