HYLAS-4

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.[2]

HYLAS-4
Spacecraft properties

Operator	Avanti Communications[1]
COSPAR ID	2018-033B
SATCAT no.	43272
Mission duration	15 years[1]


Bus	Star-3 Bus
Manufacturer	Orbital ATK[2]
Launch mass	4,000 kg


Start of mission
Launch date	5 April 2018, 21:34 UTC[2]
Rocket	Ariane 5 flight VA242[2]
Launch site	ELA-3, Guiana Space Centre[2]
Contractor	Arianespace[1]


Orbital parameters
Eccentricity	circular[3]
Periapsis altitude	35,786 km[3]
Apoapsis altitude	35,786 km[3]
Period	23h 56min[4]


Transponders
Band	Ka-band[1]
Capacity	up to 28 GHz[1]

Mission

The satellite is built to provide high speed data transmission services to Africa, Latin America and Europe.[5] 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.[6] The capacity will partially be used to allow Avanti to expand into new markets and provide growth for existing markets.[1]

Launch

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.[1][2] The satellite reached its geostationary orbital position by 19 April 2018.[7]

References

"HYLAS 4". space.skyrocket.de. Retrieved 2018-03-03.
"Ariane 5 (VA242) • DSN-1 & Hylas 4". spaceflight101.com. Retrieved 2018-03-03.
"What Is a Geosynchronous Orbit?". Space.com. Retrieved 2018-03-03.
"Sidereal Day | COSMOS". astronomy.swin.edu.au. Retrieved 2018-03-03.
"Hylas 4 satellite to be launched by Arianespace - Arianespace". Arianespace. Retrieved 2018-03-03.
"Avanti Communications - Satellite Fleet - HYLAS 4". Avanti Communications. Retrieved 2018-10-25.
https://investor.avantiplc.com/news/hylas-4-reaches-geo-orbit/

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April	Dragon CRS-14 · 1KUNS-PF · Irazú · UBAKUSAT – Superbird-B3 · HYLAS-4 – Yaogan 31A · 31B · 31C · Weina 1B – IRNSS-1I – AFSPC-11 · EAGLE – Blagovest-12L / Kosmos 2526 – TESS – Sentinel-3B – Zhuhai-1 × 5
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