Cluster whistler historical space-audio player

SPACE AUDIO DECK // FILE 2 OF 3_×

Waveform envelope derived from the Cluster whistler WAV samples — REAL WAVEFORM · MAGNETOSPHEREWHISTLER

DATA LOCKMASTER GAIN −15 dB

CLUSTER 3+4 / WHISTLER04 FEB 2001

15 SEC · WAVNEXT AUDIO >>

UNIV. OF IOWA / CLUSTER · WHAT IS A WHISTLER?

BOARD ASSISTANT×

REAL SPACECRAFT DATA

This falling whistle began with lightning.

Cluster recorded low-frequency radio waves travelling through Earth's plasma. Higher frequencies arrive first, producing the descending tone.