The Cluster spacecraft in special configuration for observing Earth's radio wave emissions in May 2008
![](https://cdn.sci.esa.int/documents/34817/35562/1567216896485-Cluster_C3_45-degree-tilt_625.jpg)
Date: 25 November 2013
Satellite: Cluster
Depicts: The four Cluster spacecraft
Copyright: ESA
The Cluster spacecraft C3 and C4, in the foreground, were used as a single observatory for the study. The C3 spacecraft (right) is shown in the special 'tilt' configuration that was used for the observations for a period of one month. The 45 degree tilt allowed for detection of the signal in 3D, and showed different results to the more typical triangulation method.
Last Update: 1 September 2019