Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

ALIS a multi-eyed voyeur in a plasma universe

24.06.2003


The Northern Lights are a visible result of physical processes in inner space. By studying the optical signal from the Northern Lights and similar phenomena, we can gain new knowledge about the physics behind them. In the long run such pure research may be of great importance for applications in our future supply of energy and for future space travel.



A dissertation at Umeå University, Sweden, by researcher Urban Brändström at The Swedish Institute of Space Physics, focuses on the construction and operation of a new land-based metering system, ALIS, designed for optic studies of the Northern Lights and other weak light phenomena. ALIS now consists of six unmanned metering stations placed in a net of squares of about 50 km on a side. Each station is equipped with a light-sensitive CCD camera and a filter wheel with narrow-band filters. It is therefore possible to carry out studies of the different “colors” in the phenomenon observed. Since the stations’ fields of vision overlap, it is also possible to glean information about altitude.

ALIS performed the first unequivocal observations of artificial light emissions at high latitudes. They were generated by a powerful radio transmitter at the EISCAT facility in Tromsø, and they were observed simultaneously by several ALIS stations. This made it possible to obtain altitude profiles for the first time. Experiments of this type thus offer exciting potential for enhanced understanding of the physics of inner space.


Recently ALIS performed observations of a meteor trail in which a preliminary study offers certain evidence that water has been observed in the meteor. ALIS has also been used for studies of Polar Stratospheric Clouds, which are seen as having a close connection to the deterioration of the ozone layer.

Rick McGregor | alfa
Further information:
http://www.irf.se

More articles from Physics and Astronomy:

nachricht UNH scientists help provide first-ever views of elusive energy explosion
16.11.2018 | University of New Hampshire

nachricht NASA keeps watch over space explosions
16.11.2018 | NASA/Goddard Space Flight Center

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

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

Im Focus: UNH scientists help provide first-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.

Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

Purdue cancer identity technology makes it easier to find a tumor's 'address'

16.11.2018 | Health and Medicine

Good preparation is half the digestion

16.11.2018 | Life Sciences

Microscope measures muscle weakness

16.11.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>