| HYLAS-4 | |
| Mission Duration: | 15 years |
| Spacecraft Bus: | Star-3 Bus |
| Launch Mass: | 4,000 kg |
| Launch Date: | 5 April 2018, 21:34 UTC |
| Launch Contractor: | Arianespace |
| Orbit Eccentricity: | circular[1] |
| Orbit Periapsis: | 35,786 km |
| Orbit Apoapsis: | 35,786 km |
| Orbit Period: | 23h 56min[2] |
| Apsis: | apsis |
| Trans Band: | Ka-band |
| Trans Capacity: | up to 28 GHz |
HYLAS-4 is a telecommunications satellite owned and operated by Avanti Communications and manufactured by Orbital ATK (now Northrop Grumman Innovation Systems) that was launched by an Ariane 5 rocket on 5 April 2018.[3]
The satellite is built to provide high speed data transmission services to Africa, Latin America and Europe.[4] It is based on Orbital ATK's Star-3 Bus, delivering 64 28 GHz fixed beams covering Africa and parts of Europe. There are also four independent steerable beams that can serve Africa, South America and Europe.[5] The capacity will partially be used to allow Avanti to expand into new markets and provide growth for existing markets.[6]
The satellite was launched into geosynchronous orbit by Arianespace on an Ariane 5 rocket in its ECA variant from ELA-3 at Guiana Space Centre in French Guiana. The launch was originally planned in early 2017 but has been delayed to 21 March 2018, and then to 5 April 2018.[6] [3] The satellite reached its geostationary orbital position by 19 April 2018.[7]