The new Hylas-4 high-throughput commercial communications satellite is scheduled to be launched into the geostationary orbit aboard Ariane 5 ECA rocket from the Guiana Space Centre in April 2018.

To be placed at 33.5° West orbital position, the satellite will provide extensive broadband communication services across Europe, Middle East and Africa. Its operations will be managed by Avanti Communications Group, a telecommunications company based in the UK.

The Hylas-4 satellite is a part of the highly adaptable satellite series, including Hylas-1 and Hylas-2 satellites, which were respectively launched in November 2010 and August 2012.

Hylas-4 communication satellite design, features and development

Orbital ATK was awarded the contract to provide design, construction, assembly and testing services for the Hylas-4 communication satellite in August 2014.

Construction on the satellite commenced in 2015 at Orbital’s manufacturing facility in Dulles, Virginia, US. The spacecraft was transported to the launch site located at French Guiana for pre-launch operations in February 2018.

“The satellite will provide extensive broadband communication services across Europe, Middle East and Africa.”

MacDonald, Dettwiler and Associates (now Maxar Technologies) was awarded a C$10m ($7.22m) contract by Orbital ATK to provide a communication antenna subsystem for the satellite in January 2016.

Based on the GEOStar-3 platform developed by Orbital ATK, the Hylas-4 satellite will have a launch mass of 3,500kg. It includes 32m-wide solar arrays, which can generate approximately 8kW of power in space.

The spacecraft will be powered by hybrid chemical and electric propulsion system, and have a designed lifespan of 15 years.

Communication capabilities of Hylas 4 satellite

The satellite is fitted with 66 fixed Ka-band user beams delivering up to 28GHz of capacity, and four steerable Ka-band beams with two channels each. The fixed Ka-band beams will cover Africa and Europe, while steerable Ka-band beams will cover markets in Latin America or Africa.

The spacecraft will provide satellite data communication services in Europe, the Middle East and Africa (EMEA). It will deliver high-speed connectivity for home-users, enterprises, mobile network operators and governments across Sub-Saharan Africa.

It will double the total services capacity of Avanti Communications while offering services to more than 36 countries worldwide.

In partnership with Global Partnership for Education (GPE), the company will enable more than 1,000 rural schools across Africa to access the internet at lower costs for e-learning and digital opportunities through Hylas-4 satellite for less than $10 a day.

The satellite can offer the services using Avanti’s Every Community Online (ECO) mobile payment app.

Hylas 4 satellite launch vehicle details

The contract for Hylas-4 satellite’s launch service operations was awarded to Arianespace in September 2014. The satellite will be launched aboard Ariane 5 ECA rocket.

The launch operations will be carried out at the Guiana Space Centre, Europe’s Spaceport in French Guiana.

Ground control station

Avanti has gateway earth stations (GES) in the UK, Cyprus, Germany and Turkey. The company established GES in South Africa and Nigeria to support the Hylas-4 satellite.

The development of ground infrastructure, including antennas, data centres and facilities, and satellite communications equipment involved a $60m investment.

The company manages four operational centres in Northern and Southern Africa, Eastern Europe and the Middle East. The centres employ a global satellite configuration and control element (GSCCE) to control and track the Hylas satellites.