SAN FRANCISCO, Feb. 18, 2021 /PRNewswire/ — Earth Observant Inc. (EOI) successfully completed a series of tests on its internally developed Hall-effect thruster that introduces new propellant types while maintaining thruster efficiency and minimizing erosion. This technology supports EOI’s core mission of operating a Very Low Earth Orbit (VLEO) constellation of Earth Imaging satellites to deliver ultra-high resolution image data.

EOI’s proprietary electric propulsion system glows blue during vacuum chamber testing at Air Force Research Lab’s facility (SPEF) at Edwards AFB in December 2020.

The HET-X Thruster combines powerful new technology, including magnetic shielding with a center-mounted cathode, a unique thermal cooling design and an effective propellant management system, in a unit weighing less than 2 kilograms (kg). The preliminary test results conducted in a vacuum chamber show sustained power input levels between 350 – 2500 watts with thruster output recorded between 20 – 140 millinewtons and specific impulse between 1300 – 2200 ISP.

This propulsion technology enables crucial satellite operating maneuvers, including drag makeup, orbital plane changes, upper stage payload ferrying, and controlled deorbiting. The potential system-wide benefits of incorporating new propellant types and other design improvements include cost reduction, elimination of high-pressure storage vessels, and use of in-situ propellants during operations.