NASA satellite spots northern lights from above

On Tuesday, NASA's Earth Observatory shared an image of the aurora borealis, or northern lights, captured by the Suomi NPP satellite's VIIRS instrument.

The Visible Infrared Imaging Radiometer Suite's day-night band, or DNB sensor, is designed to observe a range of wavelengths from green to near-infrared. The instrument and the satellite's software uses filtering techniques to isolate different sources of low light, including auroras, wildfires, city lights and even reflected moonlight.

Over the weekend, VIIRS picked up the glow of the northern lights. The aurora was spotted swirling across northern Canada.

When enough high-energy particles from the sun collide with Earth's magnetosphere, some of the particles already trapped in the magnetosphere get knocked into the upper atmosphere. As these particles hit oxygen and nitrogen gas, they cause the molecules to vibrate and glow a variety of bright colors.

Unfortunately, Suomi's VIIRS images don't render its low-light targets in color. However, the impressive revolution of the satellite's images can help scientists understand the dynamics of complex phenomena like auroras.

"When I first saw images like this as a graduate student, I was immediately struck by the fluid dynamic characteristics of the aurora," Tom Moore, a space physicist at NASA's Goddard Space Flight Center, said in a blog post describing the unique imaging abilities of the Visible Infrared Imaging Radiometer Suite.

"Viewing the aurora in this way makes it immediately clear that space weather is an interaction of fluids from the Sun with those of the Earth's upper atmosphere," Moore said. "The electrodynamics make for important differences between plasmas and ordinary fluids, but familiar behaviors (for example, waves and vortices) are still very apparent. It makes me wonder at the ability of apparently empty space to behave like a fluid."

The blast of solar particles that triggered the photographed aurora were expelled by the sun on April 19 and hit Earth's magnetosphere on April 21.

Related Links
Earth Observation News - Suppiliers, Technology and Application

Tweet

Thanks for being there;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Monthly Supporter
$5+ Billed Monthly

paypal only

SpaceDaily Contributor
$5 Billed Once

credit card or paypal

Airbus adds extra precision to Sentinel-3 satellite altimetry
Madrid, Spain (SPX) Apr 19, 2018
A new highly precise MicroWave Radiometer (MWR) built by Airbus is ready to start operations after the launch of the Sentinel-3B satellite built by Thales Alenia Space as prime contractor for this program. It is one of the essential instruments of the Sentinel-3 spacecraft, measuring atmospheric humidity as supplementary information for tropospheric path correction of the altimeter signal. In addition, MWR data is useful to measure surface emissivity and soil moisture over land, surface ener ... read more