These articles appeared originally as Digital HF: Intercept & Analyze, a monthly column in the pages of US radio listener’s magazine The Spectrum Monitor from January to December 2016. They are reproduced here with only minor editing and updating.
Digital HF: Intercept & Analyze and its predecessor of 16 years, Monitoring Times magazine’s Digital Digest, has sought to shine a light on the many organizations using digital communications techniques on shortwave (HF) radio by documenting their operating habits, frequencies and schedules used, and analyzing the digital systems they employ. If you are interested in finding ministries of foreign affairs, commercial businesses, embassies, armies, air forces, navies, multinational peacekeepers, police, intelligence agencies, customs and border patrol units, and many humanitarian aid and other NGOs (Non-Governmental Organizations) on HF radio and want to know how they work, this book is for you. This volume covers topics as diverse as monitoring various MIL-STD-188-141A Automatic Link Establishment networks, the US Navy HF broadcast system, Pakistani Navy, Russian Navy, Egyptian Diplomatic Service, US Department of Veteran's Affairs, Algerian Forces, Mauritanian Gendarmes, Brazilian Forces, US SHARES NCS network, decoding the NATO STANAG4285 HF modem, the US Army MARS TSA network, UN missions in Africa, Differential GPS, weather fax and ocean sensing RADARs.