Behind her, she dragged a sled loaded with a ground-penetrating radar, which fired pulses through a thousand feet of ice and analyzed the radio waves that bounced off the seawater below, thus building a detailed image of the glacier beneath her feet.Erin Pettit leaves camp with a ground-penetrating radar in tow.
“Most of the vessels operating do not use this and are ‘dark,’ meaning they don’t appear in public surveillance systems, and the ones that did broadcast did so relatively infrequently,” says David Kroosdma, director of research and innovation at the international nonprofit Global Fishing Watch and coauthor of the study.
“Most of the vessels operating do not use this and are ‘dark,’ meaning they don’t appear in public surveillance systems, and the ones that did broadcast did so relatively infrequently,” says David Kroosdma, director of research and innovation at international nonprofit Global Fishing Watch and co-author of the study.
The ruins are deep underground, but a team of archaeologists from the University of Cambridge and Ghent University in Belgium have used ground-penetrating radar (GPR) to map the complete city.
Many of our air traffic controllers are relying on 50 year-old radar installations and antiquated equipment to safely guide passengers through our increasingly crowded skies.
That follows on the release, last summer, of Fox Racing Shox’s Live Valve, an electronically controlled suspension system that reacts almost instantly to terrain, and the year before, an automatic gear-shifting mode for Shimano’s STEPS e-bike drivetrain.
OMG is a multi-pronged effort to map the underwater contours of the Greenland coast, and better understand how warming ocean waters drive melting ice. A giant leap forward came late in 2017, when NASA, the University of California, Irvine and others published high resolution maps of the bedrock and sea floor around Greenland.
"The plume pattern in the imagery instantly tells you without the need for radar or lightning observations or other information that these are the storms you really, really need to look out for," said Kris Bedka, an atmospheric scientist at NASA's Langley Research Center in Hampton, Virginia.