How GCHQ prepares for interception of phone calls from satellite links

(Updated: January 6, 2017) Most of the Snowden-revelations are about spying on the internet, but NSA and GCHQ are also conducting the more traditional collection of telephone communications that go through satellite links. What needs to be done before phone calls can be collected, can be learned from two highly detailed technical reports from the GCHQ listening station near Bude in the UK. These reports were published on August 31 last year by the German magazine Der Spiegel and the website The Intercept as part of a story about how Turkey is both a partner and a target for US intelligence. Here we will analyse what's in these reports, which give an interesting impression of the techniques used to transmit telephone communications over satellite links. Satellite dishes at the GCHQ intercept station near Bude, Cornwall, UK Officially, such technical reports are called "informal reports", as opposed to the "serialized reports" that contain finished intelligence...