Small satellite propulsion technology developer Exotrail has been backed by Satt Paris-Saclay as it prepares for a 2019-2020 market launch.

France-based small satellite propulsion technology developer Exotrail has obtained €3.5m ($4.1m) in a round backed by regional tech transfer office Satt Paris-Saclay through an authorised conversion of claims process.

The round was led by 360 Capital Partners, through its Fonds Robolution, while Irdi Soridec Gestion, through its IRIDnov 2 Fund, public investment bank Bpifrance, through its Amorçage Ambition Angel Fund and assorted angel investors also participated.

Exotrail is working on electric propulsion systems for small satellites in industries such as telecoms or earth observation. The systems are powered by a charge known as the Hall Effect Thruster (HET), whereby electrons are trapped in a magnetic field and used to ionise the propellant.

The spinout is developing two products, one for satellites with masses of up to 100 kilograms called ExoMG-micro, and another named ExoMG-nano for more compact spacecraft weighing between 10 and 20 kilograms.

Exotrail argues HET technology offers superior thrust to existing alternatives while maintaining energy efficiency. It aims to complete demonstrations and begin deliveries by late-2019 or early 2020, and also hopes to develop software to complement its products.

The company was co-founded by chief technology officer Jean-Luc Maria, who stood down from public research institute French National Center for Scientific Research in August 2018 after 16 years working on space projects.