Navigation Links
New radar satellite technique sheds light on ocean current dynamics
Date:1/24/2008

Ocean surface currents have long been the focus of research due to the role they play in weather, climate and transportation of pollutants, yet essential aspects of these currents remain unknown.

By employing a new technique based on the same principle as police speed-measuring radar guns to satellite radar data, scientists can now obtain information necessary to understand better the strength and variability of surface current regimes and their relevance for climate change.

Scientists at the SeaSAR 2008 workshop held this week in ESRIN, ESA's European Centre for Earth Observation in Frascati, Italy, demonstrated how this new method on data from the Advanced Synthetic Aperture Radar (ASAR) instrument aboard ESAs Envisat, enabled measurements of the speed of the moving ocean surface.

Synthetic Aperture Radar (SAR) instruments, such as ASAR, record microwave radar backscatter in order to identify roughness patterns, which are linked to varying surface winds, waves and currents of the ocean surface. However, interpreting radar images to identify and quantify surface currents had proven very difficult.

By using the new information embedded in the radar signal the Doppler shift of the electromagnetic waves reflected from the water surface Dr Bertrand Chapron of the French Research Institute for Exploitation of the Sea (IFREMER), Dr Johnny Johannessen of Norways Nansen Environmental and Remote Sensing Centre (NERSC) and Dr Fabrice Collard of France's BOOST Technologies were able to determine how surface winds and currents contribute to the Doppler shift.

The Doppler shift occurs due to changing relative velocities, experienced in everyday life in the way the pitch of a siren on a passing ambulance goes up as it approaches, then goes down as the vehicle recedes away.

The shift is introduced by the relative motion between the satellite platform, the rotation of the Earth and the velocity of the particular facet
'/>"/>

Contact: Mariangela D'Acunto
mariangela.dacunto@esa.int
39-069-418-0856
European Space Agency
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Satellites witness lowest Arctic ice coverage in history
2. UNCCD recognizes importance of satellites for combating desertification
3. Satellites help ensure efficient use of pesticides
4. Telemedicine: Health alert via satellite
5. ASU researchers use NASA satellites to improve pollution modeling
6. New technique can be breakthrough for early cancer diagnosis
7. University of Leicester scientists discover technique to help friendly bacteria
8. New technique reveals subtle force-induced changes in biomolecules conformation
9. New magnetic separation technique might detect multiple pathogens at once
10. New technique captures chemical reactions in a single living cell at unprecedented resolution
11. Software Techniques Inc. Selects M2SYS Fingerprint Software to Meet Continuous Growth and Demand for Desktop Biometric Time & Attendance Solutions
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/30/2014)... 30, 2014) People who suffer from asthma may ... control their asthma besides properly taking medications and avoiding ... in the Annals of Allergy, Asthma and Immunology ... Allergy, Asthma and Immunology (ACAAI), asthma sufferers can learn ... The woman described in the Annals article improved her ...
(Date:9/29/2014)... ramosum , coupled with a high-fat diet, may cause animals ... mBio , the online open-access journal of the American ... German Institute of Human Nutrition Potsdam-Rehbruecke in Nuthetal observed that ... gained weight when fed a high-fat diet. Mice that did ... when consuming a high-fat diet, and mice that had ...
(Date:9/29/2014)... 29, 2014 -- Plants have a symbiotic relationship ... pants extract nutrients and defend against invaders ... fruits and vegetables. Now, scientist have discovered that ... seeds; thus ensuring that sprouting plants are colonized ... of Notre Dame, presented their findings today at ...
Breaking Biology News(10 mins):Asthma symptoms kicking up? Check your exposure to air pollution 2Gut bacteria promote obesity in mice 2Plants prepackage beneficial microbes in their seeds 2
... volume transmitted every second with every quick eye movement ... Ruhr-Universitt Bochum (RUB) and the University of Osnabrck describe ... visual cortex, the entry point for the visual information ... ". Deploying novel optical imaging methods, they demonstrated that ...
... University researchers have shown natural radioactivity within DNA can ... mutation. The research, recently published in Biochimica ... looked at natural radioactivity within human DNA on the ... bodies as well as in every living organism across ...
... explanation for how the most common strain of methicillin-resistant ... prominence. Research published in mBio , the online ... that the strain recently acquired a number of genes ... and thrive on the skin where other strains of ...
Cached Biology News:Neurons subtract images and use the differences 2Neurons subtract images and use the differences 3Radioactivity muddles the alphabet of DNA 2MRSA strain gained dominance with help from skin bacteria 2
(Date:9/30/2014)... Using a bio-mimicking analog of one of ... an international research team led by Alejandro Briseno ... a major step in developing long-sought polymer architecture ... for use in electronic devices. , Briseno, ... and others at Stanford University and Dresden University ...
(Date:9/30/2014)... Sept. 30, 2014 Report Details ... highest potential revenues Do you want to find ... you revenue predictions for those biological drugs from ... you find financial data, R&D trends, opportunities and ... sales forecasts to 2024 at overall world market, ...
(Date:9/30/2014)... Nematicide is a type of chemical ... parasitic roundworms, found in massive quantities virtually everywhere—in ... animals. Nematicides have tended to be broad-spectrum toxicants ... through the soil. A single gram of soil ... more than 10,000 species classified, they are one ...
(Date:9/30/2014)... Proove Biosciences , the commercial and ... a new genetic test built upon research from their ... will provide physicians with an objective way to ... are stratified between individuals. With this new test, physicians ... a genetic predisposition that will affect their pain tolerance. ...
Breaking Biology Technology:Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 2Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 4Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 5Nematicides Market by Types (Fumigants, Organophosphates, Carbamate and Bio-Nematicides), Applications (Agrochemicals, Industrial, and Others), and Geography (North America, Europe, Asia-Pacific & ROW) - Global Trends & Forecasts to 2019 2Proove Biosciences is Now Offering the Proove Pain Perception Genetic Test to Help Physicians Assess Patient Pain Tolerance Levels 2Proove Biosciences is Now Offering the Proove Pain Perception Genetic Test to Help Physicians Assess Patient Pain Tolerance Levels 3
... Oncolytics Biotech Inc.,("Oncolytics") (TSX:ONC, NASDAQ:ONCY) announced today ... of its manufacturing process for,REOLYSIN(R) to commercial ... production and downstream processing,development was undertaken by ... located in Montreal, Canada., "Our existing ...
... Industry Expertise to Pathwork Following FDA ... Clearance and $20M Fundraising Round, SUNNYVALE, ... on oncology, announced today the,appointment of two key positions within ... Mark McDonough as Vice,President of US Sales. These professionals bring ...
... CJPS Enterprises, LLC, (http://www.CJPS-Enterprises.com ), the operator ... ) is announcing a new service available,to ... business, or looking to,invest in Michigan companies ... existing resources available on the Michigan Life ...
Cached Biology Technology:Oncolytics Biotech Inc. Completes Initial Scale Up of Manufacturing Process for REOLYSIN(R) to Commercial Scale 2Pathwork Diagnostics Announces Key Additions to Management Team 2The Michigan Life Sciences Pipeline Announces 'The Funding Place(TM)' and Other Resources to Connect Investors and Startups 2
...
Phospho-4E-BP1 (Thr37/46) (236B4) Rabbit mAb Shipping Temperature: Cold Storage Temperature: -20C...
RNA polymerase sigma 70 Immunogen: Recombinant, full length protein. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Rat monoclonal to UGGT ( Abpromise for all tested applications)....
Biology Products: