Salsa Onsala is a 2.3 m radio telescope operating at a wavelength of 21 cm. At this wavelength, one can observe the spiral arms of the Milky Way (our galaxy). To detect cosmic signals while watching the telescope move in the webcam is a great thrill for both pupils and teachers.
Onsala Space Observatory is the Swedish National Facility for Radio Astronomy. The observatory operates the two radio telescopes in Onsala, 45 km south of Göteborg, Sweden, in the mm and cm wavelength regions, and is one of three partners in the APEX telescope in Chile.
Onsala Space Observatory
Watch the radio-telescope in the webcam (which is in the nearby control building)
Webcam View of the radio telescope
(In the Exercises section, there is a manual that describes how to operate the antenna and how data should be processed and interpreted)
To use the telescope, you need a linux computer. If you don't have that, we supply a boot-cd with Knoppix, which starts you computer in a Linux environment. It doesn't write anything to your harddrive and is perfectly safe to use. You can also download the source and burn a cd yourself.
It is then easy to connect to the computer in Onsala and start observing!
The observations are done with the program qradio
When you run the antenna from qradio you can see it move in the webcam.
(Here the telescope is in its parking position)
There is a planetarium software, kstars, that comes free with
every linux distribution. When logged in to the telescope,
you can use this software to point the telescope to different interesteing astronomical objects.
The observations are saved into files that you can retrieve,
for further analysis with SalsaJ. There is data uploaded
in the Exersices section, which you can download and analyse.
There is also a spreadsheet with calculations where you can
add you own observations and make a better map of the Milky Way
To observe with SalsaOnsala, EUHOU pilot school teachers
should request observation time with Daniel
Johansson (email daniel(at)oso.chalmers.se),
where (at) should be replaced by @.
Onsala Space Observatory; Chalmers University of Technology