| Mission type | Earth orbiter |
|---|---|
| Operator | Telebrás andViasat |
| COSPAR ID | 2017-023B[1] |
| SATCATno. | 42692[2] |
| Website | Portal SGDC Telebras |
| Mission duration | 18 years (planned) |
| Spacecraft properties | |
| Bus | 4000C4 |
| Manufacturer | Thales Alenia Space |
| Launch mass | 5,735 kg (12,644 lb) |
| Dimensions | 7.10 m × 2.20 m × 2.0 m (23.3 ft × 7.2 ft × 6.6 ft) |
| Power | 11 kW |
| Start of mission | |
| Launch date | May 4, 2017, 21:52 (2017-05-04UTC21:52) UTC[3][4] |
| Rocket | Ariane 5 VA236 |
| Launch site | KourouELA-3 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 73.7° W[2] |
| Semi-major axis | 42,164.0 km (26,199.5 mi)[2] |
| Eccentricity | 0.00016[2] |
| Perigee altitude | 35,784.6 km (22,235.5 mi)[2] |
| Apogee altitude | 35,802.6 km (22,246.7 mi)[2] |
| Inclination | 0.0229°[2] |
| Period | 1,436.1 minutes[2] |
| RAAN | 66.4545°[2] |
| Argument of perigee | 43.2613°[2] |
| Mean anomaly | 250.3095°[2] |
| Mean motion | 1.00272241[2] |
| Epoch | July 8, 2018[2] |
| Revolutionno. | 436 |
| Transponders | |
| Band | 50Ka band 7IEEEX-band |
| Coverage area | Brazil,South Atlantic Ocean |
TheGeostationary Satellite for Defense and Strategic Communications (Portuguese:Satélite Geoestacionário de Defesa e Comunicações Estratégicas, orSGDC) is a Braziliangeostationary communication satellite that was built byThales Alenia Space in France, it was placed in the orbital position of 75 degrees west longitude and will be operated byTelebrás.Telebrás selectedViasat 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 anAriane 5 vehicle from the French companyArianespace, launched fromGuiana Space Centre,Kourou,French Guiana, together with theKoreasat 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 theBrazilian government and theBrazilian 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]
{{cite web}}: CS1 maint: numeric names: authors list (link)BNamericas: Will there be a new geostationary satellite? It was part of the initial SGDC program plan that Brazil had more than one geostationary satellite. Menezes: Yes, the initial idea was to have a constellation. But I think there's no space for this at the moment. We're not discussing it. But there are private options out there.
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