voyager 1

voyager 1

Jupiter whistlers recorded by Voyager 1

2d ago
SOURCE  

Description

These signals were recorded by the Voyager 1 plasma wave instrument as the spacecraft flew past Jupiter on March 5, 1979. Jovian whistler waves propagate at audio frequencies along closed field lines in Jupiter's magnetosphere. Like Earth whistlers, the higher frequency components of the Jovian whistler propagate faster than the lower frequency components, resulting in a descending whistling tone. Also like Earth whistlers, Jovian whistlers are generated by lightning discharges in the atmosphere. It was the detection of these signals that provided the first indirect evidence of lightning on the giant planet. The video shows a spectrogram with time along the horizontal axis, frequency on the vertical axis, and color-coded amplitude with weak signals blue and strong signals red. A moving cursor shows the time of the corresponding audio. For more information on the Voyager project: http://voyager.jpl.nasa.gov/ This is a sample from the collection of Prof Don Gurnett's favorite space audio recordings available from: http://space-audio.org/ For similar videos: https://www.youtube.com/user/VoyagerPWS/videos