Arianespace successfully conducted its fifth 2019 launch on the night of June 20-21. The aim was to place the Eutelsat 7C and T-16 telecommunications satellites in geostationary transfer orbit. The launch was carried out by an Ariane 5 ECA, the second Ariane 5 of the year. T-16 was the first to separate from the launcher, 27 minutes after take-off, followed by Eutelsat 7C, which was released six minutes later. This launch was the 104th Ariane 5 mission The AT&T-owned T-16 will provide television broadcasting services to the continental United States, Alaska, Hawaii and Puerto Rico. Eutelsat 7C will serve Africa, Europe, the Middle East and Turkey. The two satellites are in contact with their ground control stations and will reach their final positions in the coming weeks. The T-16 will use chemical motors for this, although once in place it will maintain its position using electric motors; the 7C will use electric motors both to reach its position and to maintain it. ABOUT GTD AT KOUROU SPACE CENTER Since 2003, each time an Ariane 5, a Soyuz or a VEGA are launched from the spaceport in Guiana, as well as the payload, many hours of work are required from GTD’s technical teams. GTD supplies services and software in practically all steps of an Ariane 5 mission – from the launcher's flight program to the responsibility of ground systems that control the launching operations, as well as the radars, telemetry and mission control systems. Each launch is also a challenge for GTD’s team, who is responsible for all the computer systems at the launch site. Each launch is a fresh new project; there is no routine, which means our engineers always embark on an adventure than goes beyond technical jobs that require a lot of responsibility. Countdown: The campaign to prepare a launcher takes about 22 - 30 working days, and a campaign to prepare the payload (satellite) takes from 4 weeks to 5 months (depending on the mission and its magnitude). Our teams are currently able to launch up to seven double Ariane 5, up to four soyuz and up to two Vega per year, that is, 14 telecom satellites and 4 to 6 EO and scientific spacecraft every year. Launch day: The end of the countdown is near. The final operations to fill the liquid propellants on the Ariane 5, and then the ground operation tests are carried out on the launcher. During this stage, gtd's staff is working hard all round the Spaceport. In the launch site's bunker, the technical centre, in Des Pêres Mountain where the radar and telemetry installations are, in the meteorological centre where the last conditions before the launch is authorised. At the same time, a support team is configuring a backup of the computer systems in Barcelona, 8,000 km away from the Ariane 5, which is already letting out oxygen steam. Ariane is launched: Once the launcher is in the air, it is controlled on board (by the embedded computer) and from the Jupiter Control Centre (CDC). These two systems were also designed by GTD’s engineers and are currently being operated by GTD’s engineers, too. Once the launcher releases the payloads (at a height of 500 - 600 km), everyone breathes a sigh of relief and starts clapping and cheering and congratulating each other; but our engineers are already thinking about the next mission that starts the following morning.
