Summary: Here's something new to worry about. Navigation systems depend on measurement of magnetic forces around the globe. And the satellites that take the measurements are about to age out. But the National Geospatial-Intelligence Agency is on it with a special funding program called the Mag-Quest Challenge. Here with what it's all about, NGA's world magnetic model program manager, Mike Paniccia. Learn more about your ad choices. Visit megaphone.fm/adchoices
