Martire is a co-chair for the United Nations' International Committee on GNSS, and said the group is assessing how the system can be used to improve early warning strategies around the world. "Instead of correcting for this as an error, we use it as data to find natural hazards,” Léo Martire, a scientist at JPL developing the GUARDIAN system, said in a statement accompanying the announcement. While most GPS systems typically seek to correct data impacted by ionospheric anomalies, these fluctuations are instead put to work in real-time by the Jet Propulsion Laboratory, a federally-funded research and development lab.
The new effort employs an experimental monitoring system called the GNSS Upper Atmospheric Real-time Disaster Information and Alert Network, otherwise known as GUARDIAN, which tracks data from GPS and other wayfinding satellites across the globe. Tsunamis span miles across the ocean's surface and displace significant amounts of air as they take shape, researchers have found, which cause gravity waves and vibrations that can be felt within minutes in the topmost layer of the atmosphere. The space agency said this week that its researchers are launching a new effort to improve real-time positional accuracy down to a few inches when monitoring for signals of a tsunami emerging virtually anywhere on the planet. NASA scientists have turned to emerging technologies and global navigational satellite systems as part of an experimental effort to augment early warning systems that can help detect tsunamis from space, according to a recent announcement.
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