Super-maneuverable Tsubame satellite. Free Technical Library News

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Super-maneuverable Tsubame satellite

16.10.2019

The Japan Aerospace Exploration Agency has successfully completed tests of the Tsubame satellite, designed to demonstrate the technology of a spacecraft (SC) in low Earth orbit.

Launched in December 2017 into an elliptical orbit with a perigee of 450 kilometers, the spacecraft moved into an orbit with a perigee of 2018 kilometers at the beginning of 392. Then the satellite descended into orbit with a perigee of 271 kilometers, where it stayed for about a month.

After that, Tsubame successively descended into orbits with perigees of 250 kilometers, 240 kilometers and 230 kilometers, lingering in each for about a week. Then the spacecraft was in orbit with a perigee of 217 kilometers for about a month. In the next orbit (altitude 181 kilometers), the satellite lasted a week.

At the end of the mission, Tsubame stabilized its position in orbit for several days with a perigee of 167 kilometers. In the latter case, the spacecraft additionally used a small liquid-propellant rocket engine (LRE) to maintain altitude and counteract aerodynamic drag, while in all other cases an electric rocket engine (Kaufman xenon ion engine) was used.

Tsubame became the first spacecraft in history to make observations of the Earth's surface, maintaining its position at a low altitude (167 kilometers) using an electric propulsion. The advantage of this technology is the possibility of obtaining high-quality images by saving on image processing systems and induction tools.

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