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Latest Interferometric synthetic aperture radar Stories

2012-01-10 23:43:22

A new analysis of satellite data from the late 1990s documents for the first time the “uplift” of ground above a site of underground nuclear testing, providing researchers a potential new tool for analyzing the strength of detonation. The study has just been published in Geophysical Research Letters. Lead author Paul Vincent, a geophysicist at Oregon State University, cautions that the findings won´t lead to dramatic new ability to detect secret nuclear explosions...

Image 1 - Slight Surface Changes Detected From Space
2011-10-13 08:23:28

Scientists are making advances in the use of satellite data to map changes in Earth´s surface. Subsidence of only millimeters can be detected thanks to advances in technology. The picturesque town of Assisi nestling in central Italy´s rolling hills has, for centuries, drawn tourists, religious pilgrims and lovers of art. But it has also drawn the attention of scientists who see the real weight of its reputation. By exploiting satellite data, they have found that some areas of...

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2011-07-12 11:00:00

Some of the last images from ESA's ERS-2 satellite have revealed rapidly changing glacial features in Greenland. In its final days, the veteran satellite gave us frequent views of the Kangerdlugssuaq glacier and its advancing ice stream. Before it retired on 6 July, ESA's ERS-2 Earth observation satellite entered an orbit to capture radar images of the same area on the ground every three days, rather than its previous 35-day cycle. Images of the Kangerdlugssuaq glacier in eastern...

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2011-07-09 10:20:00

Some of the last images from ESA's ERS-2 satellite have revealed rapidly changing glacial features in Greenland. In its final days, the veteran satellite gave us frequent views of the Kangerdlugssuaq glacier and its advancing ice stream. Before it retired on 6 July, ESA's ERS-2 Earth observation satellite entered an orbit to capture radar images of the same area on the ground every three days, rather than its previous 35-day cycle.  Images of the Kangerdlugssuaq glacier in eastern...

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2011-04-04 07:50:38

The Kilauea volcano that recently erupted on the Big Island of Hawaii will be the target for a NASA study to help scientists better understand processes occurring under Earth's surface. A NASA Gulfstream-III aircraft equipped with a synthetic aperture radar developed by NASA's Jet Propulsion Laboratory in Pasadena, Calif., departed on Sunday, April 3, from the Dryden Aircraft Operations Facility in Palmdale, Calif., to the Big Island for a nine-day mission. The Uninhabited Aerial Vehicle...

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2011-02-02 23:00:00

With interest growing in satellite radar techniques that provide 3D views of Earth's natural and urban environments, scientists from around the world recently gathered to review the latest findings and show how these methods can be used to monitor our changing world. The technique of Synthetic Aperture Radar (SAR) radar polarimetry allows polarized information to be measured in the signals backscattered from Earth to a satellite sensor. Polarimetric interferometry is achieved by using...

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2010-12-14 08:37:06

By Susan Young, Stanford University When you dive into that salad full of lettuce grown in the American West, there's a good chance you are enjoying the product of irrigation from an underground water source. These hidden groundwater systems are precious resources that need careful management, but regulatory groups have a hard time monitoring them, owing to a lack of accurate data. Now, scientists at Stanford have found a way to cheaply and effectively monitor aquifer levels in agricultural...

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2010-11-02 12:33:09

Adding to their unique information from previous tandem missions, ESA's ERS-2 and Envisat satellites have been paired up again "“ for the last time. Data from this final duet are generating 3D models of glaciers and low-lying coastal areas. The 2010 tandem campaign continues the work of the satellites' earlier joint efforts on measuring the speed of fast-moving glaciers, detecting land-ice motion and developing elevation models over flat terrain. Their third pairing took place from...

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2010-10-16 10:00:00

Scientists are crediting satellite imagery with helping to predict where volcanic eruptions could strike. It is well known that earthquakes can stress Earth's crust and trigger subsequent quakes, but there has been no proof of this for volcanoes until now. In September 2005, a volcanic event in Ethiopia's Afar Desert forced magma up through rocks in a crack, known as a dyke, resulting in a 60-km-long tear in Earth's crust. Over the next four years, 12 more dykes were created in the same...

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2010-08-06 19:40:00

New NASA airborne radar images of Southern California near the U.S.-Mexico border show Earth's surface is continuing to deform following the April 4 magnitude, 7.2 temblor and its many aftershocks that have rocked Mexico's state of Baja California and parts of the American Southwest."¨"¨The data, from NASA's airborne Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), reveal that some faults in the area west of Calexico, Calif., have continued to move at Earth's surface,...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'