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ESA contracts Arianegroup to make a more versatile Ariane 6
by Staff Writers
Paris, France (SPX) Jul 15, 2021

This optional small stage will further enhance the versatility of Ariane 6 to meet the needs of Arianespace customers even better. For example, it will enable dual launches with a first payload to be placed in geostationary transfer orbit (GTO) and then inject the second directly into geostationary orbit (GEO)."

The European Space Agency (ESA), as part of its Ariane 6 Competitiveness Improvement Program, has chosen ArianeGroup to develop and build a complementary stage (kick-stage) for Ariane 6, called ASTRIS, which will enable Arianespace, operator of the new European launcher, to place with even greater efficiency a larger number of payloads in different orbits, or to inject satellites into geostationary orbit (GEO).

This optional stage will also contribute to enhanced performance for certain Ariane 6 missions, including those to the Moon or deep space, as it will make for reduction in spacecraft complexity and the risks inherent in orbit injection.

Worth a total of euro 90 million, the contract follows a decision made at the ESA Ministerial Conference in November 2019.

From the beginning of the Ariane 6 program, the launcher was designed to be scalable and incorporate innovations throughout its operating cycle. This contract rewards the expertise and innovation capacity of our Bremen site in the field of launcher upper stages, while our teams near Munich are currently developing the new BERTA engine. By pooling our skills, this project further strengthens Germany's role in the new European launcher, Ariane 6.

This optional small stage will further enhance the versatility of Ariane 6 to meet the needs of Arianespace customers even better. For example, it will enable dual launches with a first payload to be placed in geostationary transfer orbit (GTO) and then inject the second directly into geostationary orbit (GEO)."

For this development, ArianeGroup will call on a number of SMEs and start-ups, including Berlin-based PTS for the electronics system, RST in Rostock for the mechanical ground support equipment, electrical harnesses and part of the electrical ground support equipment, and the Austrian company FACC for the primary structure.

ASTRIS will be powered by an innovative engine called BERTA (Bi-Ergoler RaumtransporTAntrieb), based on technologies developed as part of ESA's Future Launchers Preparatory Program (FLPP).

This type of engine can be reliably reignited several times, making it particularly suitable for extended missions or for transport to different orbits.

ASTRIS will be placed between the upper stage and the payload or between the Ariane Double Launch System (DLS) and its payload (which can consist of one or several satellites), reducing the amount of fuel required for orbit injection.

Even more than with a "standard" Ariane 6, the kick-stage will simplify the orbit injection at different inclinations of satellites of the same constellation.

Finally, this small additional stage will be particularly useful for launching electrically-powered satellites. Once placed in their transfer orbit, these satellites may take several months to reach their final orbit. Thanks to the ASTRIS kick-stage, this phase can be reduced to a few hours, which constitutes a significant advantage for operators choosing this option. This will reinforce Ariane 6's position as the most precise launcher on the market, capable of bringing a satellite to the last kilometer of its final orbital position.

The ASTRIS system is developed for ESA at ArianeGroup's Bremen site, the European center of excellence for upper stages, in close collaboration with its Ottobrunn (engines) and Lampoldshausen (propellant pipes and valves) sites. ArianeGroup's unique expertise, acquired through long and close cooperation between these establishments, is the hallmark of the European market leader.

Pre-development activities already carried out on the BERTA engine under the FLPP will enable the engine to be developed at ArianeGroup's Ottobrunn site south of Munich within the same timeframe as ASTRIS, to secure its market entry. ArianeGroup has already successfully tested a prototype of this engine on the test bench of the German Aerospace Center (DLR) in Lampoldshausen. BERTA is an engine in the 4 to 5 kilonewton class, designed to operate with room-temperature storable propellants.

The funding of the kick-stage and the BERTA engine is provided in the framework of ESA's Competitiveness Improvement Program (CIP).

Related Links
Rocket Science News at Space-Travel.Com

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Ariane 6 targets new missions with Astris kick stage
Paris (ESA) Jul 14, 2021
ESA will enhance the versatility of Europe's Ariane 6 rocket with a kick stage called Astris in a euro 90 m development contract with prime contractor, ArianeGroup. This is part of ESA's strategy to extend Ariane 6's capabilities to serve a wider range of space transportation requirements. Astris is planned to fly by mid 2024 as an optional add-on to Ariane 6's upper stage and will interface directly with the payload. This will enable Ariane 6 to offer a range of new space transportation services ... read more

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