ownership and management that Terma developed into the company it is today. Throughout the 1950s, Terma A/S conducted numerous large-scale projects involving the overhaul and upgrade of radars, computer systems, and air defense systems on behalf of the Danish Armed Forces. Its first radar systems were for navigation purposes and installed mainly on secondary vessels. Over a period of 20 years, Terma A/S opted to focus much of its resources onto the development of numerous products related to radars, computers, and missile systems, and started to expanded into the wider European market. During the 1960s, Terma A/S secured work within several international programs, such as the development and production of the RIM-7 Sea Sparrow surface-to-air missile; the firm continued to be involved in the Sea Sparrow's support for over fifty years. In 1961, Terma A/S commenced development of the first Doppler radar, which was used to measure the velocity of the Sidewinder air-to-air missile. During 1966, the firm was awarded the first European contract to deliver a ground check-out system for satellites. The 1970s was a turbulent time for Terma A/S in terms of its ownership; it briefly became a subsidiary of several firms, including the Dannebrog Gruppen and BW Holding. During the early 1970s, Terma A/S became an active participant in the space industry, beginning production of equipment for a variety of scientific satellite missions over the following years, supplying both hardware and software systems for this sector. In 1977, Terma A/S took over the Bravour company, through which it established its own extensive range of VHF-based communication equipment which, amongst other customers, was heavily used by the Danish Armed Forces. Following Denmark's decision to purchase the Swedish-built Saab 35 Draken fighter aircraft during the early 1970s, Terma A/S was awarded its first contract for supply of critical aircraft electronics. Around this same time, the firm also became involved in the supply of various aviation electronics systems for the General Dynamics F-16 Fighting Falcon fighter aircraft, particularly those that were purchased by European customers; this co-production arrangement was considered a break-through for Terma A/S. During 1980, the Thomas B. Thrige Foundation took over the majority of the stocks in Terma A/S. That decade, following an order from the Royal Danish Air Force, the company developed an original self-protection system compatible with both fixed-wing aircraft and helicopters. Terma A/S also developed new command and control systems for Royal Danish Navy