Tools & Technology
GPS Modernization Is More Than a Satellite: What GAO’s New Audit Uncovered
A new GAO audit follows GPS from orbit to ground control to the equipment using its signals, revealing why…
Surveying connects us to place
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Listening to the Sky: How Surveying GNSS Finds Its Place
The receiver on a survey pole is listening to a remarkable conversation about time. Here is how satellite signals become useful positions—and why the last word still belongs to the…
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Measuring the World
Clocks as Surveying Instruments: Relativistic Geodesy and the Shape of Earth
Optical atomic clocks can sense differences in gravitational potential, opening a path toward measuring physical height through the rate…
Measuring the World
When Coordinates Expire: Surveying on a Moving Continent
Precise coordinates are tied to both a reference frame and a date because tectonic plates, earthquakes, subsidence, and other…
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