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New Light on Ice Motion (DAAC Study)
Rachel Hauser November 5, 2001 Detailed antarctic temperature and climate records date only from the late 1950s, with limited information dating from the turn of the 20th century. Now, using visible and near-infrared satellite imagery, scientists have piec...
Urban Heat Makes Cities � Greener?
environments extend the growing season by two weeks, according to new research. The term "urban heat islands" has for decades been used to describe the fact that roads and concrete buildings retain heat better than rural terrains. Using NASA's Moderate Resolution...
Observing Volcanoes, Satellite Thinks for Itself
sending lava through the streets of Goma. The eruption killed roughly 50 people, and thousands remained displaced years later. (Photograph ©2006 Tom Schaul, EAUasis.) On December 1, 2006, the international science community received an appeal for assistance from the...
Showdown in the Rio Grande
such as Space Imaging’s IKONOS satellite, which views a much smaller area than ASTER but has approximately 1-meter resolution. Instruments on aircraft may also play an important role in tracking plant infestations as planes can allow scientists to collect high-re...
New Tools for Diplomacy (DAAC Study)
"High-resolution imagery simply isn't affordable for many potential users, including some government agencies," said Sandalow. Also present is the danger of imagery misinterpretation. "Satellite images have the potential, if misinterpr...
The Incredible Glowing Algae (DAAC Study)
each sensor detect chlorophyll absorption. As the concentration of chlorophyll increases, satellite images show the ocean surface changing from blue to shades of green. To illustrate these changes, most ocean color imagery uses a color palette ranging from purple to orang...
New Tools for Conservation
or urban growth, to the frequency and severity of air pollution events, to increased ocean temperatures in sensitive coral habitat. Along with other agencies, NASA is entering “a new age of remote sensing,” says Woody Turner, a program scientis...
Spy Satellite So Stealthy that the Senate Couldn't Kill It
U.S. would be able to continue to obtain high resolution photographs of targets in the Soviet Union even if the Soviets even in the face of "an intense Soviet effort" to reduce coverage. The memo specifies the requirements for establishing a covert...
Sensing Remote Volcanoes (DAAC Study)
Belinda’s eruption might not have been detected for weeks or even months. “Normally, this remote volcano would have gone unmonitored,” said Rob Wright, research scientist at the Hawaii Institute of Geophysics and Planetology (HIGP). “However, when our sys...
Ice and Sky (DAAC Study)
salinity in the (near-to-surface) ocean mixed layer. The high resolution SAR interests scientists like Kwok because they may use it to track ice as it opens and refreezes. But although the SAR data provide new advantages for viewing the Arctic Basin, they also presented...
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