Signal Tide is a sound and extraterrestrial radio installation artwork. It combines real-time signals from an abandoned satellite currently orbiting the earth (the LES-1, launched in 1965) with specially-commissioned music and sound, created by David Bryant (of Godspeed You! Black Emperor and Hiss Tracts), Drew Barnet, and James Hamilton, in collaboration with Kovács/O’Doherty.
Excerpt from the signal of the LES-1 satellite, derived from I/Q data recorded in September 2016, in Lunow-Stolzenhagen, Germany. Screen recording shows waterfall spectrogram of I/Q data played back via Gqrx SDR.