SES 21 is positioned at orbital location 131.0° W. The satellite serves North, Central and South America, as well as the Caribbean basin — providing television broadcasting, sports event transmission and broadband access for corporate and private clients. For Ukrainian and European subscribers, this satellite is of no practical interest: all beams are formed exclusively for the American continent.
Launch and Technical Platform
The satellite was launched to geostationary orbit on 9 June 2021 by SpaceX's Falcon 9 rocket from Cape Canaveral Space Force Station, Florida. The platform is Maxar SSL 1300, one of the most widely used in the commercial satellite industry for medium and heavy-class spacecraft. Design lifetime: 15 years. NORAD ID: 53961.
Coverage Areas and Reception in Ukraine
All antenna beams of SES 21 are oriented towards the American continent. Four main service areas: North America, Central America, South America and the Caribbean basin. Reception from Ukraine is physically impossible — the orbital position 131° W does not fall within the visibility zone from Europe, and the elevation angle above the horizon for Kyiv is negative.
| Beam | Coverage | Typical Antenna Diameter |
|---|---|---|
| North American | USA, Canada, Mexico | 1.8–2.4 m |
| Central American | Central American countries | 2.4 m |
| South American | Brazil, Argentina, Chile and others | 2.4–3.0 m |
| Caribbean | Caribbean islands | 2.4 m |
| Ukraine / Europe | Reception not possible | — |
Transponders and Frequency Band
SES 21 operates exclusively in the C-band: reception 3.7–4.2 GHz, transmission 5.925–6.425 GHz. 15 active transponders are in service. C-band is a deliberate choice for the Caribbean region and Central America: it is significantly more resistant to tropical rainfall compared to Ku-band. In practice, when setting up a 2.4 m antenna in the Caribbean zone, signal level remains stable even during heavy cloud cover. Broadcasting is conducted in DVB-S2 standard, with modulation scheme depending on the specific transponder and operator.
Television Packages and Channels
The satellite carries 42 television channels on board. Among them are North American broadcasters, sports transmissions and services for corporate clients. Major American television networks use SES 21 for continental content distribution. Part of the transponder capacity is allocated to VSAT services in regions with weak terrestrial infrastructure.
Frequently Asked Questions
Can SES 21 be received in Ukraine?
No. Position 131° W does not fall within the visibility zone from Europe. The elevation angle above the horizon for Kyiv is negative — no antenna will help.
What frequency band does SES 21 use?
C-band exclusively. Reception requires a C-band converter and an antenna from 1.8 to 3.0 m depending on region and transponder.
How many transponders are active on SES 21?
15 active transponders, total channel count — 42.
What platform is the satellite built on?
Maxar SSL 1300, design lifetime 15 years. Launch — 9 June 2021, Falcon 9, Cape Canaveral.