Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NASA’s ICESat: One Billion Elevations Served

21.11.2005


NASA’s Ice, Cloud and land Elevation Satellite (ICESat) fired its one billionth laser shot earthward on Nov. 18, to obtain elevations from objects on the land, sea and in the air.



ICESat measures the Earth’s polar ice sheets, clouds, mountains and forests with three lasers. Crisscrossing the globe at nearly 17,000 miles per hour, ICESat provides unprecedented accuracy in mapping Earth’s vertical characteristics, enabling scientists to see objects on Earth in three dimensions.

The principal mission of ICESat is to measure the surface elevation of the large ice sheets covering Antarctica and Greenland. Measurements of elevation-change over time will show whether the ice sheets are melting or growing as the Earth’s climate undergoes natural and human-induced changes.


The instrument on ICESat that makes the claim is the Geoscience Laser Altimeter System (GLAS) instrument. GLAS fired its one billionth shot on the morning of Friday, November 18. "One billion shots equal one billion elevation measurements around the world of land, sea clouds, etc." said Waleed Abdalati, head of the Cryospheric Sciences Branch, Hydrospheric and Biospheric Sciences Laboratory, at NASA’s Goddard Space Flight Center, Greenbelt, Md. "That number tops the 6.5 million shots from Mars Orbiter Laser Altimeter, an instrument currently in orbit around Mars on the Mars Global Surveyor spacecraft," he said.

GLAS sends short pulses of green and infrared light though the sky 40 times a second, all over the globe, and collects the reflected laser light with a one-meter telescope. It also fires a fine laser beam of light that spreads out as it approaches the Earth surface to about 65 meters in diameter. On its way to the surface, those photons or particles of light bounce off clouds, aerosols, ice, leaves, ocean, land and more providing detailed information on the vertical structure of the earth system.

ICESat was launched on January 3, 2003 from the Vandenberg Air Force Base, Calif.

Rob Gutro | EurekAlert!
Further information:
http://www.nasa.gov/vision/earth/lookingatearth/icesat_billion.html
http://icesat.gsfc.nasa.gov
http://www.nasa.gov

More articles from Earth Sciences:

nachricht Using tree-fall patterns to calculate tornado wind speed
25.06.2018 | Ecological Society of America

nachricht Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle
22.06.2018 | Technical University of Denmark

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Superconducting vortices quantize ordinary metal

Russian researchers together with their French colleagues discovered that a genuine feature of superconductors -- quantum Abrikosov vortices of supercurrent -- can also exist in an ordinary nonsuperconducting metal put into contact with a superconductor. The observation of these vortices provides direct evidence of induced quantum coherence. The pioneering experimental observation was supported by a first-ever numerical model that describes the induced vortices in finer detail.

These fundamental results, published in the journal Nature Communications, enable a better understanding and description of the processes occurring at the...

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Rapid water formation in diffuse interstellar clouds

25.06.2018 | Physics and Astronomy

Using tree-fall patterns to calculate tornado wind speed

25.06.2018 | Earth Sciences

'Stealth' material hides hot objects from infrared eyes

25.06.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>