First Look

Second ESA satellite completes Earth-mapping Sentinel constellation

The European Space Agency's Sentinel-1B joins its twin, Sentinel 1-A, in orbit around the Earth. Together, the satellites will create a full map of the entire Earth every six days.

  • close
    The European Space Agency (ESA) successfully launches Sentinel 1B, the second of two satellites designed to map the earth and research climate change. Rough Cut (no reporter narration).
    View Caption
  • About video ads
    View Caption

Europe's environmental monitoring program, Copernicus, has a new eye in the sky.

Another Sentinel satellite launched Monday atop a Soyuz rocket is the latest addition to a suite of satellites recording data and images about various Earth processes. 

The new addition, Sentinel-1B, joins its twin, Sentinel-1A, carrying radar technologies that can image the surface of the planet day or night, sun or rain. Orbiting 180 degrees apart, the two satellites together will complete a full map of the Earth's surface every six days.

"This is the fourth satellite that we’ve launched for Copernicus in just two years and this launch is certainly a special moment because it completes the Sentinel-1 constellation," Volker Liebig, the European Space Agency's director of Earth Observation Programmes, said in an ESA press release.

"The launch of Sentinel-1B marks another important milestone as this is the first constellation we have realised for Copernicus," said ESA’s Director General Jan Woerner.

Sentinel-1A was launched in April 2014. Since then, the satellite has helped experts monitor the melting of Earth's ice caps and ice sheets, warn of icebergs, and map geological processes, like shifts from earthquakes and volcanoes. The satellite has also been used to monitor fisheries in the Mediterranean.

"We have seen some marvelous results from Sentinel-1A. Only two weeks ago, for example, it captured images of large icebergs breaking away from Antarctica’s Nansen ice shelf," Dr. Liebig said. "Given that Antarctica is heading into winter now and daylight hours are getting shorter, radar images are vital to see what changes are taking place."

Sentinel-1B wasn't the only passenger on the Soyuz rocket that blasted into space Monday. Three student-designed CubeSats and a Microscope satellite, a French space agency probe, hitched a ride too.

The CubeSats, itty-bitty satellites that are just about 4x4x4.3 inches, are part of ESA's Education Office's Fly Your Satellite! program. They were designed and programmed by three university teams from the University of Liege, Belgium, the Polytechnic of Turin, Italy, and Aalborg University, Denmark.

"The programme is helping to educate the next generation of scientists and engineers by transferring ESA knowhow in designing, building, testing, launching and operating satellites," said Piero Galeone, ESA’s Head of the Tertiary Education Unit.

Make a Difference
Inspired? Here are some ways to make a difference on this issue.
FREE Newsletters
Get the Monitor stories you care about delivered to your inbox.

We want to hear, did we miss an angle we should have covered? Should we come back to this topic? Or just give us a rating for this story. We want to hear from you.