Tech

April 5, 2013

NASA flies radar south on wide-ranging scientific expedition

A versatile NASA airborne imaging radar system is showcasing its broad scientific prowess for studying our home planet during a month-long expedition over the Americas.

A NASA C-20A piloted aircraft carrying the Uninhabited Aerial Vehicle Synthetic Aperture Radar is wrapping up studies over the U.S. Gulf Coast, Arizona, and Central and South America. The plane left NASA’s Dryden Aircraft Operations Facility in Palmdale, Calif., March 7. NASA’s Jet Propulsion Laboratory in Pasadena built and manages UAVSAR.

The campaign is addressing a broad range of science questions, from the dynamics of Earth’s crust and glaciers to the carbon cycle and the lives of ancient Peruvian civilizations. Flights are being conducted over Argentina, Bolivia, Chile, Colombia, Costa Rica, El Salvador, Ecuador, Guatemala, Honduras, Nicaragua and Peru.

UAVSAR uses a technique called interferometry that sends microwave energy pulses from the sensor on the aircraft to the ground. This technique can detect and measure subtle changes in Earth’s surface like those caused by earthquakes, volcanoes, landslides and glacier movements. The radar’s L-band microwaves can penetrate clouds and the tops of forests, making it invaluable for studying cloud-covered tropical environments and mapping flooded ecosystems.

“This campaign highlights UAVSAR’s versatility for Earth studies,” said Naiara Pinto, UAVSAR science coordinator at JPL. “In many cases, study sites are being used by multiple investigators. For example, some volcanic sites also have glaciers. The studies also help U.S. researchers establish and broaden scientific collaborations with Latin America.”

Volcano scientists will compare UAVSAR’s images taken during this campaign with new imagery collected in 2014 in order to measure very subtle sub-centimeter changes in Earth’s surface associated with the movement of magma at depth beneath active volcanoes. These results are expected to improve models used to understand and potentially mitigate volcanic hazards. The volcanoes being studied are in Guatemala, El Salvador, Nicaragua, Costa Rica, Colombia, Ecuador, Peru, Bolivia, Chile and Argentina.

UAVSAR glacier data from South America’s Andes Mountains will be combined with ground measurements and airborne lidar data to determine how much these glaciers move during summer and from year to year. The U.S. Geological Survey is leading the collaborative project with the Chilean government to understand glacier processes within the context of climate change impacts from human activities. The glaciers being imaged by UAVSAR provide freshwater for the residents of Santiago and water for regional agriculture.

This year’s study sites include coastal mangroves in Central and South America. “Much of Earth’s population lives along coasts, and its livelihood and well-being depend on services provided by marine ecosystems,” said JPL’s Marc Simard, one of the campaign’s many principal investigators. “These regions are among the most fragile on Earth. It is critical to understand how the interactions of human activities and climate change may impact the sustainability of these ecosystems.”

Another principal investigator, Kyle McDonald, jointly of JPL and the City University of New York, is leading four data collections that will support the mapping of wetlands across the greater Amazon River

basin, including Pacaya-Samiria National Park in Peru. “Pacaya-Samiria contains large expanses of flooded palm swamps,” McDonald said. “These ecosystems are potential major sources of atmospheric methane, an important greenhouse gas. UAVSAR will help us better understand processes involved with the exchange of methane between Earth’s land and atmosphere, and with the contribution of these unique ecosystems to Earth’s climate.”

UAVSAR also is supporting agricultural studies of vineyards in Chile’s La Serenas region. The efforts will help scientists at the Universidad de La Serena’s Terra Pacific Group better understand the value of soil moisture data in grape and wine production. Another study site in Argentina will be overflown by both UAVSAR and the Argentine sensor SARAT as part of a collaboration between research scientist Thomas Jackson of the U.S. Department of Agriculture and Argentina’s Comision Nacional de Actividades Espaciales. These studies assist scientists preparing for the launch of NASA’s Soil Moisture Active Passive (SMAP) satellite in 2014.

The radar also is imaging the northern coastal Peruvian desert, where the Moche culture lived almost 2,000 years ago. Researchers are using UAVSAR’s vegetation and cloud penetrating capabilities to search for unrecorded archaeological features in an attempt to preserve sensitive sites from encroaching civilization.

JPL researcher Sassan Saatchi is using UAVSAR to study the structure, biomass and diversity of tropical cloud forests in the Peruvian Andes and Manu National Park, continuing his work there during the past decade. The data will be used to evaluate how much carbon the forests contain and assess their vulnerability to human and natural disturbances.

UAVSAR also is monitoring seasonal land subsidence and uplift in groundwater basins in Arizona’s Cochise County for the Arizona Department of Water Resources. Other subsidence studies in New Orleans and the Mississippi Delta are aimed at better understanding what causes Gulf Coast subsidence and predicting future subsidence rates. The data can help agencies better manage the protection of infrastructure, including levees in the New Orleans area.




All of this week's top headlines to your email every Friday.


 
 

 

UAE unveils mission plan for first Arab space probe to Mars

http://www.multivu.com/players/English/7520951-uae-mission-to-mars/ The blueprints and science goals for the first Arab mission to Mars have been revealed for the first time. The Emirates Mars Mission probe, named “Hope”, will create mankind’s first integrated model of the Red Planet’s atmosphere. The unmanned probe will leave Earth in 2020 on a mission designed to compl...
 
 

NASA test materials to fly on Air Force space plane

Building on more than a decade of data from International Space Station research, NASA is expanding its materials science research by flying an experiment on the U.S. Air Force X-37B space plane. By flying the Materials Exposure and Technology Innovation in Space investigation on the X-37B, materials scientists have the opportunity to expose almost 100...
 
 

$2 million A.F. prize for development of a small, efficient turboshaft engine

Registration is now open for the $2 million Air Force Prize that will be awarded to the first entrant to successfully develop a small, lightweight, fuel-efficient turbine engine. “In order to continue to move forward and to ensure that our Air Force has the best technology available, it is imperative that we collaborate with industry...
 

 

Raytheon surveillance technologies, analytics proven aboard Navy Stiletto

The U.S. Navy has successfully tested Raytheon’s advanced intelligence, surveillance and reconnaissance technologies†aboard the experimental ship known as the M80 Stiletto, while the vessel was underway. The test took place during operations at Joint Expeditionary Base Little Creek-Fort Story, Va. The combined technology was created by combining two, proven Raytheon technologies: the Pe...
 
 

Headlines May 4, 2015

News: Authorization Bill a prelude to U.S. spending showdown - The House Armed Services Committee handed the Pentagon and U.S. defense sector a victory by surgically protecting weapon programs and authorizing extra war funding – but a showdown with the White House looms.   Business: Canada plans major sub-life extension - Canada has begun work on a...
 
 

New’s Briefs May 4, 2015

Senator proposes extended military foreclosure protection Sen. Sheldon Whitehouse says he has introduced legislation to help protect military service members from losing their homes to foreclosure. The Rhode Island Democrat said May 2 he has introduced a bill to extend one that is due to expire this year. The law protects service members for a...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>