Naval radio signals may cause the formation of a barrier observed during geomagnetic storms that is seemingly impenetrable by relativistic electrons.
satellites
Posted inAGU News
Bringing Satellite Observations Down to Earth
This month’s issue of Eos shows how scientists can sometimes get a better look at something by stepping far—much, much farther—away.
Posted inEditors' Highlights
All Hands on Deck to Catch Ion Cyclotron Waves
An international armada of orbiting satellites and ground VLF network join forces to form a “magnetosphere-ionosphere observatory” to size up electromagnetic ion cyclotron waves in the magnetosphere.
Posted inResearch Spotlights
A GOLDen Way to Study Space Weather
A NASA mission is observing airglow in the upper atmosphere and uncovering what it tells us about Earth’s space weather system.
Posted inNews
Flickers of Light Help Map the Space Junkyard
Researchers are identifying space debris by measuring its flickering patterns of reflected light.
Posted inResearch Spotlights
In Vegetation Growth Studies, What You Measure Matters
Different satellite-based metrics for global vegetation coverage tell complementary, but not identical, stories.
Posted inScience Updates
Earth Observations Inform Cities’ Operations and Planning
Rio de Janeiro, Brazil, and Chicago, Ill., are using NASA Earth observations to map, monitor, and forecast water and air quality, urban heat island effects, landslide risks, and more.
Posted inScience Updates
Mapping Vegetation Health Around the World
A new spaceborne sensor monitors Earth’s surface temperature at a resolution higher than ever before, providing information on ecosystem responses to changes in water availability and climate stressors.
Posted inNews
Five Things Spy Satellites Have Taught Us About Earth
Long before we had satellites beaming terabytes of data back to Earth, we had covert spacecraft the size of school buses snapping photos on rolls of film 50 kilometers long.
Posted inENGAGE, GeoFIZZ
Six Ways Satellites Tracked COVID-19
A new database reveals dimmer cities, empty farming fields, and vacant ports.