PERSEI Space

PERSEI Space is a Spanish space-technology company founded in 2023 by specialists in electrodynamic tether (EDT) technology. Its business is built around a single core idea: instead of carrying chemical propellant to remove or move a satellite, deploy a conductive tape that interacts with Earth's magnetic field to generate drag or thrust. The company states that its propellant-less deorbit and propulsion systems are intended to help satellite operators and launch providers comply with international debris-mitigation requirements while reducing mass, cost and operational complexity. The company traces its roots to European research and development projects, notably E.T.PACK and E.T.PACK-F, and describes itself as building sustainable electrodynamic-tether-based subsystems for the "new space economy." Its commercial portfolio spans software, flight hardware and testing services. On the software side, BETsMA v2.0 is a mission-analysis tool that takes mass, orbit and objectives (deorbiting, reboost, station-keeping, power harvesting) and returns an optimal tether configuration with full mission results. On the hardware side, the Autonomous Deorbit Device (DD) is a compact EDT subsystem for guaranteed disposal in low Earth orbit, designed to be integrated before launch to satisfy rules such as the U.S. FCC five-year rule or ESA Zero Debris requirements, or deployed through in-orbit servicing for active debris removal. The Green Mobility Module (GMM) is a 3U, roughly 7 kg propellant-less deorbiting and propulsion module aimed at satellites in the 70–210 kg range, powered by solar energy harvested in orbit and under development in the EIC-funded E.T.COMPACT programme. The company also offers satellite testing services: MADES, a magnetic-dipole characterisation platform for satellites from 1U to 12U, and SACS, a three-degrees-of-freedom air-bearing attitude-control simulator for satellites under 40 kg. PERSEI Space positions itself at the intersection of space sustainability and commercial small-satellite operations. Its pitch is that EDT technology is propellant-free, reversible, scalable and capable of autonomous deorbiting — attributes that matter as regulators tighten post-mission disposal rules. The company is privately held, based in Spain, and active in the European space ecosystem, appearing at events such as ESA Zero Debris Week. Its public communications highlight in-orbit demonstration work, including the E.T.PACK-F 12U, 20 kg deorbit device and the follow-on PEARSON product, as well as the E.T.COMPACT project running from 2024 to 2027 that aims to raise EDT technology toward Technology Readiness Level 4.

PERSEI Space was founded in 2023 by experts in electrodynamic tether technology, with roots in European research and development projects including E.T.PACK and E.T.PACK-F. The company was established to commercialise electrodynamic tether (EDT) subsystems for the emerging "new space economy," focusing on propellant-less deorbit and propulsion solutions. Its technology builds on the principle that a conductive tape deployed from a satellite can interact with Earth's magnetic field to generate drag or thrust without consuming propellant. PERSEI Space frames this as a way for satellite operators and launch providers to comply with international debris-mitigation requirements while reducing mass, cost and operational complexity. By the mid-2020s the company had assembled a commercial portfolio spanning mission-analysis software, deorbit hardware, propulsion modules and satellite testing services. The Autonomous Deorbit Device (DD) was developed as a compact EDT subsystem for guaranteed disposal in low Earth orbit, integrable before launch to meet rules such as the U.S. FCC five-year rule or ESA Zero Debris requirements, or deployable via in-orbit servicing for active debris removal. The E.T.PACK-F 12U, 20 kg deorbit device was described as on the way to an in-orbit demonstration, with PEARSON identified as the follow-on product. A second hardware line, the Green Mobility Module (GMM), was placed under development within the European Innovation Council (EIC) Pathfinder project E.T.COMPACT, running from 2024 to 2027. The GMM is intended as a 3U, roughly 7 kg propellant-less deorbiting and propulsion system for satellites in the 70–210 kg range, powered by solar energy harvested in orbit. The project aims to advance EDT technology toward Technology Readiness Level 4 by validating key innovations, including combined deorbiting and in-orbit propulsion capabilities such as controlled de-boosting, station-keeping, orbit re-boosting and orbital transfers. Alongside hardware, PERSEI Space commercialised BETsMA v2.0, a mission-analysis software tool for EDT systems, and two satellite testing services: MADES, a magnetic-dipole characterisation platform for satellites from 1U to 12U, and SACS, a three-degrees-of-freedom air-bearing attitude-control simulator for satellites under 40 kg that was used extensively in the E.T.PACK-F project to validate the ADCS of an autonomous 12U deorbit device. The company is based in Spain and has maintained a visible presence in the European space community, including participation in ESA Zero Debris Week 2026 in Seville. Its leadership includes CTO Francisco de los Ríos, who has represented the company in regional entrepreneurship media such as the Alcobendas Emprende podcast.

• 2026

  PERSEI Space participates in ESA Zero Debris Week 2026 in Seville, Spain.

• 2024

  E.T.COMPACT EIC Pathfinder project begins (2024–2027), developing the Green Mobility Module toward TRL 4.

• 2023

  PERSEI Space founded by electrodynamic tether experts.

Propellant-less, reversible, scalable and autonomous electrodynamic-tether subsystems for sustainable access to space and debris-mitigation compliance.

• BETsMA v2.0

  Mission analysis software for electrodynamic tether systems; takes mass, orbits and objectives (deorbiting, reboost, station-keeping, power harvesting) and returns optimal tether configuration and full mission results.

• Autonomous Deorbit Device (DD)

  Compact electrodynamic tether subsystem for guaranteed disposal in low Earth orbit; integrable before launch (e.g. U.S. FCC 5-year rule or ESA Zero Debris rules) or deployable via in-orbit servicing for active debris removal. E.T.PACK-F (12U, 20 kg) on the way to in-orbit demo; PEARSON as the follow-on product.

• Green Mobility Module (GMM)

  3U, 7 kg propellant-less electrodynamic deorbiting and propulsion system for 70–210 kg satellites, powered by solar energy harvested in orbit; under development in the EIC-funded E.T.COMPACT programme (2024–2027).

• MADES

  Cost-effective magnetic characterization platform with adjustable non-metallic frame, 12 magnetic sensors and dedicated algorithms estimating dipole position, direction and magnitude for satellites from 1U to 12U.

• SACS

  Satellite Attitude Control Simulator: advanced testing platform for full ADCS validation of satellites under 40 kg, with three-degrees-of-freedom air bearing, sunlight emulator and sensor suite.

1. 1PERSEI Space | Electrodynamic tether solutionsperseispace.com
2. 2Products & Services | PERSEI Spaceperseispace.com
3. 3Green Mobility Module (GMM) | PERSEI Spaceperseispace.com
4. 4SACS | PERSEI Spaceperseispace.com
5. 5PERSEI Spacewikidata.org