01 October 2019
An Introduction to Radio Astronomy (4th Ed)
... researchers alike. Its three main sections cover the emission, propagation and detection of radio waves; radio telescopes and aperture synthesis; and the radio cosmos – in essence, the instruments, the telescopes and what they observe in 500 pages...
June 2021
The next ‘unthinkable’ – global disruption from a solar storm
... x-rays can affect both high and low frequency radio signals by disturbing Earth’s ionosphere through which radio waves travel. The strongest radio blackouts can totally shut down radio communication and GPS for hours at a time. The degradation...
02 December 2020
Astronomers map a million previously undiscovered galaxies in record time
...most detailed survey of the southern sky ever carried out using radio waves. All in all, 13.5 exabytes of raw data was ... (SKA); an international effort to build the world’s largest radio telescope. The SKA will eventually use thousands of dishes and...
October 2016
The dwarf galaxy problem
... of dwarf galaxies can be seen surrounding it. In this image every object is a galaxy. This neutral hydrogen gas emits radio waves with a wavelength of 21cm and is a ‘forbidden line’, meaning the transition which causes it is very rare and wouldn...
March 2015
Sky links: from multi-satellite systems to nano-launchers
...open hardware and open software is best suited. Software-defined radio technologies (SDR) can be used for high-frequency sections ... properties. Spatial and polarisation division of same-frequency radio-waves is a principle that is still widely used. ...
08 June 2020
New discovery provides important clues on mysterious cosmic bursts
..., while looking through archival pulsar survey data, two astronomers spotted something very unusual; fleeting bursts of radio wave emission caused by some unexplained high-energy astrophysical process. Since then, the race has been on to discover...
