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Astronomers realize mysterious TV signal in their data bounced off an airplane
Rogue TV signals have plagued the Murchison Wide-field Array for five years.
The sky is awash with radio-frequency interference (RFI), but thanks to two astronomers who tracked down a stray TV broadcast reflected off a passing airplane, there may be a new way to wipe out some of the rogue signals that plague our radio telescopes. The MWA consists of 4,096 antennas designed to detect low-frequency radio waves between 70 and 300 MHz that carry information from the universe's epoch of reionization, when the first stars and galaxies were forming. "By accurately identifying and removing only the sources of interference, astronomers can preserve more of their observations, reduce frustrating data loss and increase the chances of making important discoveries."
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