Bramstedtlund is a municipality in the district of Nordfriesland, in Schleswig-Holstein, Germany.

An HF direction finding system with the code name Castagnete is on the northern border of Germany.

The outer diameter of the circular Wullenwever antenna is 450 meters.

The facility was built by DASA and recording operations began in the “Kastagnette” Bramstedtlund on March 15, 1995.

The unit reports to the Strategic Reconnaissance Command (KSA)[3] and shares data with the BND.