| SGDC | |
| Mission Type: | Earth orbiter |
| Operator: | Telebrás and Viasat |
| Website: | Portal SGDC Telebras |
| Cospar Id: | 2017-023B[1] |
| Satcat: | 42692[2] |
| Mission Duration: | 18 years (planned) |
| Spacecraft Bus: | 4000C4 |
| Manufacturer: | Thales Alenia Space |
| Launch Mass: | 5735kg (12,644lb) |
| Dimensions: | 7.1x |
| Power: | 11 kW |
| Launch Date: | UTC[3] [4] |
| Launch Rocket: | Ariane 5 VA236 |
| Launch Site: | Kourou ELA-3 |
| Launch Contractor: | Arianespace |
| Orbit Epoch: | July 8, 2018 |
| Orbit Reference: | Geocentric |
| Orbit Regime: | Geostationary |
| Orbit Longitude: | 73.7° W |
| Orbit Periapsis: | 35784.6km (22,235.5miles) |
| Orbit Apoapsis: | 35802.6km (22,246.7miles) |
| Orbit Inclination: | 0.0229° |
| Orbit Semimajor: | 42164km (26,199miles) |
| Orbit Eccentricity: | 0.00016 |
| Orbit Period: | 1,436.1 minutes |
| Orbit Raan: | 66.4545° |
| Orbit Arg Periapsis: | 43.2613° |
| Orbit Mean Anomaly: | 250.3095° |
| Orbit Mean Motion: | 1.00272241 |
| Orbit Rev Number: | 436 |
| Apsis: | gee |
| Trans Band: | 50 Ka band |
| Trans Coverage: | Brazil, South Atlantic Ocean |
The Geostationary Satellite for Defense and Strategic Communications (Portuguese: Satélite Geoestacionário de Defesa e Comunicações Estratégicas, or SGDC) is a Brazilian geostationary communication satellite that was built by Thales Alenia Space in France, it was placed in the orbital position of 75 degrees west longitude and will be operated by Telebrás. Telebrás selected Viasat as a partner to help build the associated ground system.[5] The satellite was based on the Spacebus-4000 platform and its life expectancy will be 18 years.[6]
The satellite was successfully launched into space on May 4, 2017, at 21:52 UTC, by means of an Ariane 5 vehicle from the French company Arianespace, launched from Guiana Space Centre, Kourou, French Guiana, together with the Koreasat 7.[7] It had a launch mass of 12,800 pounds (5,800 kg). The SGDC will be equipped with 50 Ka band transponders and 5 X band transponders to provide broadband internet and communications to the Brazilian government and the Brazilian Armed Forces.[8]
A backup satellite, SGDC-2, was initially planned for launch no earlier than 2022.[9] As of July 2021, the procurement of this satellite has been delayed indefinitely due to concerns over cost and the legality of the procurement agreement.[10] [11]