News

Academy of Finland granting funding for a joint research project of Aalto University and Finnish Geospatial Research Institute

VLBI measurements carried out as part of space geodesy research help to determine Earth’s position.
metsahovi_milo_saarinen_en_en.jpg

A joint research consortium of Aalto University and the Finnish Geospatial Research Institute (FGI) is developing a new method in which the Earth's position can be determined more accurately than before. The purpose of the project is to improve the accuracy of very long baseline interferometry (VLBI) observations.

The VLBI technique combines signals emitted by radio sources in distant space (quasars) that have been picked simultaneously by radio telescopes in different parts of the globe. With this technique, both the structure of the quasars and the location of the telescopes can be measured with an extremely high level of accuracy. VLBI measurements are used in astronomy and geodesy. The observations made in geodetic measurements are used to monitor the Earth's position and the maintenance of the global coordinate system, which provide the basis for the use of positioning satellites. As the system becomes more accurate, the effectiveness of satellite navigation is also enhanced. An accurate coordinate system also provides an essential basis for observing a large number of global changes.

"The project tackles the time-dependent and frequency-dependent structure of quasars as a factor adversely affecting the measurement accuracy. This has been previously overlooked and it has become a key issue in the efforts to achieve major improvements in the accuracy and stability of the coordinate systems. I believe that the methods that we have developed for astronomical VLBI observations will significantly boost the efforts to find a solution to this problem,” says Tuomas Savolainen, director of the consortium.

At Aalto University's Metsähovi Radio Observatory in Kirkkonummi, astronomical and geodetic VLBI measurements are carried out on a regular basis together with international observation networks.

The Research Council for Natural Sciences and Engineering selected 70 new Academy projects for funding in the autumn 2017 application round. A total of about EUR 39.5 million in funding is granted to the Academy of Finland projects and most of this goes to four-year research projects. Some 15 per cent of all funding applications were approved.

 

Inquiries:

Tuomas Savolainen, Academy Research Fellow
[email protected]

  • Published:
  • Updated:
Share
URL copied!

Related news

Visitors exploring the virtual exhibition on a touch screen
Research & Art Published:

Aalto Math & Arts in Shanghai Future Lab exhibition

The interdisciplinary Math & Arts program, with its underlying course Crystal Flowers in Halls of Mirrors, is introduced to the visitors of the exhibition.
Suomessa kehitettiin tekoäly, joka ymmärtää paremmin ihmisen tavoitteita
Research & Art Published:

Designing AI that understands humans’ goals better

To make a better smart assistant, we need an AI that understands its user and does not constantly need detailed instructions
Oniipa
Research & Art Published:

Researchers are importing electricity and internet connections to a Namibian village – required technology can be transported in a pickup

The initiative to be piloted on Independence Day seeks to aid the everyday lives of people in small communities while creating a framework for businesses.
Polymer film that bends when light is shone on it
Research & Art Published:

Liquid crystal polymer learns to move and grab objects

Researchers trained material the same way as Pavlov trained dogs.