NASA Puts IT to Work Tracking Solar Storms

 
 
By Chris Preimesberger  |  Posted 2008-07-28 Email Print this article Print
 
 
 
 
 
 
 

UPDATED: NASA's THEMIS project combines IT with satellite technology and cutting-edge research to give scientists new insights into what causes the undulating lines of glowing color known as the northern lights. The project will also give scientists a clearer understanding of how massive streams of charged particles from the sun can affect the performance of communications satellites and power grids on Earth.

NASA has brought together a space weather satellite network, global communications and plenty of IT muscle to gain new insight into what causes the undulating streams of color known as the northern lights.

While the project is paying dividends in terms of pure scientific research, it will also have practical value here on Earth by potentially giving scientists a way to predict solar storms that trigger the eerily beautiful phenomenon.

NASA's THEMIS project (Time History of Events and Macroscale Interactions During Substorms) is dedicated to studying the high atmosphere. NASA scientists revealed July 24 in an article in Science Magazine that they now know why the northern lights dance the way they do.

The lights, also called the aurora borealis, are caused by immensely powerful bursts of charged particles from the sun's surface, which can also damage satellites in space while overloading and possibly shutting down electric power grids on Earth.

Damage to satellites in turn could affect telephone communications, degrade the ability of television networks to transmit signals to local stations or homes and knock out the GPS systems people use to find their way in unfamiliar territory.

Based on the recent data they have gathered, THEMIS researchers said, they believe that during aurora borealis events, "stressed" lines in the Earth's magnetic fields suddenly snap to a new shape, like a stretched rubber band that was suddenly released, in a process called magnetic reconnection. Researchers are still trying to find out why this happens and why it affects radio waves; that's the main thrust of the ongoing project.

THEMIS is counting on this new information to help them improve substorm models and forecasts, so that governments and companies can be forewarned about possible interruptions.

"Aurora are the visual representation of disturbances [substorms] in the atmosphere," David Sibeck, THEMIS project scientist at NASA's Goddard Space Flight Center, told me. "As they capture and store energy from the solar wind, the Earth's magnetic field lines stretch far out into space.

"Magnetic reconnection releases the energy stored within these stretched magnetic field lines, flinging charged particles back toward the Earth's atmosphere. They create halos of shimmering aurora circling the northern and southern poles."

Auroras are certainly beautiful to see, but more important is this: These changes in the ionosphere can have a profound effect, especially when it comes to the satellite communications we all depend upon. Disruption of HF radio communications, obviously, can be a serious problem for airline pilots all over the world.

Has a connection between the aurora and communications disruptions been proven? If so, how does it affect the radio waves?
 
"At times of large storms, auroras can be seen as far south as Florida, and within them there are many substorms," THEMIS project supervisor Vassilis Angelopoulos, a faculty member at UCLA, told me. "These are known to affect communications and to affect transmission of shortwave radio as well as GPS lock quality, because the ionosphere that reflects or transmits those waves is altered severely by the space particle radiation."



 
 
 
 
Chris Preimesberger Chris Preimesberger was named Editor-in-Chief of Features & Analysis at eWEEK in November 2011. Previously he served eWEEK as Senior Writer, covering a range of IT sectors that include data center systems, cloud computing, storage, virtualization, green IT, e-discovery and IT governance. His blog, Storage Station, is considered a go-to information source. Chris won a national Folio Award for magazine writing in November 2011 for a cover story on Salesforce.com and CEO-founder Marc Benioff, and he has served as a judge for the SIIA Codie Awards since 2005. In previous IT journalism, Chris was a founding editor of both IT Manager's Journal and DevX.com and was managing editor of Software Development magazine. His diverse resume also includes: sportswriter for the Los Angeles Daily News, covering NCAA and NBA basketball, television critic for the Palo Alto Times Tribune, and Sports Information Director at Stanford University. He has served as a correspondent for The Associated Press, covering Stanford and NCAA tournament basketball, since 1983. He has covered a number of major events, including the 1984 Democratic National Convention, a Presidential press conference at the White House in 1993, the Emmy Awards (three times), two Rose Bowls, the Fiesta Bowl, several NCAA men's and women's basketball tournaments, a Formula One Grand Prix auto race, a heavyweight boxing championship bout (Ali vs. Spinks, 1978), and the 1985 Super Bowl. A 1975 graduate of Pepperdine University in Malibu, Calif., Chris has won more than a dozen regional and national awards for his work. He and his wife, Rebecca, have four children and reside in Redwood City, Calif.Follow on Twitter: editingwhiz
 
 
 
 
 
 
 

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