Subscribe free to our newsletters via your
. Space Industry and Business News .




EARTH OBSERVATION
TerraSAR-X images Bonneville salt flats
by Staff Writers
Berlin, Germany (SPX) Oct 22, 2012


The German Aerospace Center's (Deutsches Zentrum fur Luft- und Raumfahrt; DLR) TerraSAR-X radar satellite orbits Earth at an altitude of 514 kilometres. It acquired this image of the Bonneville Salt Flats in the USA at 13:40 local time on 23 June 2009. The black represents areas of water, where radar signals transmitted by the satellite are reflected away by the smooth surface of the water. The city of Wendover is conspicuous in the upper half of this space radar image, with the orange colouring indicating a strong increase in the local variance of the return signal, due to direct or multiple reflections off the buildings and streets. Credit: DLR (CC-BY 3.0).

Clouds, darkness, rain - the radar 'vision' of TerraSAR-X is unaffected by these conditions. Dark and light areas contrast clearly in this image, acquired by the German Aerospace Center's (Deutsches Zentrum fur Luft- und Raumfahrt; DLR) TerraSAR-X satellite.

The black areas represent water, where radar signals transmitted by the satellite are not returned, as they are reflected away by the smooth surface of the water. The city of Wendover is conspicuous in the upper half of this space radar image.

"These are not lights shining. The radar is detecting a strong increase in the local variance of the return signal," explains DLR researcher Daniel Schulze. The reason for this is that the colouring of the image is based on a statistical assessment of the data set, where the variance in the roughness of the surface is colour-coded.

Hence, built-up areas appear rough to the radar and appear orange, as there is a high probability that the radar signal will find its way back to the satellite following direct or multiple reflections off the buildings and streets.

The Bonneville Salt Flats is the largest salt pan lying to the west of the Great Salt Lake, in the northern part of the US state of Utah. The salt pan arose towards the end of the last ice age as a consequence of Lake Bonneville drying up.

This was a prehistoric lake that stretched across a large section of the major basin to the west of the Rocky Mountains, and of which only the Great Salt Lake now remains. The former Bonneville Lake is history; today the salt flats stretch out over an area of some 10,360 square kilometres.

Full speed across the desert
TerraSAR-X circles the Earth in a polar orbit at an altitude of 514 kilometres. Its active array antenna enables it to provide radar data with a resolution of down to one metre, regardless of weather conditions, cloud coverage and availability of daylight. It acquired this unique image at 13:40 local time on 23 June 2009.

The scene measures 50 by 30 kilometres. TerraSAR-X also cast a penetrating eye on the around 2000-metre-high mountains and the salt lake, which lies at an altitude of some 1270 metres. The image shows rough surfaces in orange and smooth ones in grey/black.

The salty desert is also known for the Bonneville Speed Races, which have been held here since 1912, and for each of which new tracks are created. The extensive, 1.5-metre-thick, hard, smooth salt surface offers the perfect surface for high-speed driving. Because of its size, the salt flat is often used for world speed record attempts.

The large, black surface bordering the industrial area in the middle of the image is the Wendover Facility. Large-scale industrial extraction of brine takes place here, which is needed for manufacturing potash.

Next to the city of Wendover is the airport, which was an air force base until 1965. Even from an altitude of over 500 kilometres, TerraSAR-X can detect the fine, parallel orange lines extending from the airport, which are other transportation routes such as Highway I-80 and the railway running from east to west.

Famous from film and television
The Great Salt Lake has been used as a backdrop in a number of films, such as 'Pirates of the Caribbean: At World's End' with Johnny Depp and 'Independence Day', directed by Roland Emmerich and featuring Will Smith. Wendover Airport, to the left of centre in the image, is known from numerous cinema productions, such as 'Con Air', directed by Simon West and starring Nicholas Cage.

TerraSAR-X is the first German satellite manufactured under what is known as a Public-Private Partnership between the German Aerospace Center (Deutsches Zentrum fur Luft- und Raumfahrt; DLR) and Astrium GmbH in Friedrichshafen.

The satellite travels around the Earth in a polar orbit and records unique, high-quality X-band radar data about the entire planet using its active antenna. TerraSAR-X works regardless of weather conditions, cloud cover or the absence of daylight and is able to provide radar data with a resolution down to one metre.

DLR is responsible for using TerraSAR-X data for scientific purposes. It is also responsible for planning and implementing the mission as well as controlling the satellite. Astrium built the satellite and shares the costs of developing and using it. Infoterra GmbH, a subsidiary company founded specifically for this purpose by Astrium, is responsible for marketing the data commercially.

.


Related Links
DLR
Earth Observation News - Suppiliers, Technology and Application






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle








EARTH OBSERVATION
Landsat Science Team to Help Guide Next Landsat Mission
Reston, VA (SPX) Oct 22, 2012
Landsat satellites have witnessed over four decades of changes on Earth. In advance of the next Landsat spacecraft launch, the Landsat Data Continuity Mission, the U.S. Geological Survey (USGS), in cooperation with the National Aeronautics and Space Administration (NASA), announces the selection of the Landsat Science Team. This expert team of scientists and engineers will serve a five-yea ... read more


EARTH OBSERVATION
Apple opens biggest Asian store in Beijing

Will Apple go for 'kill' with iPad Mini?

Taiwan temple to launch 'divine advice' app

Kennedy Supporting Effort to Develop Satellite Servicing Capabilities

EARTH OBSERVATION
$15M order for Harris tactical radios

SPAWAR Atlantic taps Engility

Northrop Grumman Begins Production of EHF SatCom System for B-2 Bomb

Mutualink Selects Benchmark to Manufacture Interoperable Communications Systems on Global Scale

EARTH OBSERVATION
AFSPC commander convenes AIB

Proton Lofts Intelsat 23 For Americas, Europe and Africa Markets

India to launch 58 space missions in next 5 years

SpaceX Dragon Successfully Attaches To Space Station

EARTH OBSERVATION
NASA's WISE Colors in Unknowns on Jupiter Asteroids

Indra Technology Supports Management And Control Of New Galileo Satellites

Testing of Galileo satellite navigation system can begin

Two more satellites for the Galileo system

EARTH OBSERVATION
Boeing EMARSS Risk Reduction Prototype Makes First Flight

NASA Seeks Student Experiments For 2013 High-Altitude Scientific Balloon Flight

Raytheon-led team graduates first Afghan Air Force pilots on Warfighter FOCUS program contract

Second UK F-35 And Marine Corps F-35B Delivered To Eglin

EARTH OBSERVATION
Breakthrough offers new route to large-scale quantum computing

Bus service for qubits

Developing the next generation of microsensors

ORNL study confirms magnetic properties of silicon nano-ribbons

EARTH OBSERVATION
Landsat Science Team to Help Guide Next Landsat Mission

TerraSAR-X images Bonneville salt flats

Earth Observation Commercial Data Market Remains Strong Despite Slowdown in 2011

Antarctic Rift Subject of International Attention

EARTH OBSERVATION
New methods might drastically reduce the costs of investigating polluted sites

Pollution row strangles Italian steel giant ILVA

S. Korean villagers evacuate after toxic leak

Council of war gathers for world's biodiversity crisis




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement