Tag Archives: space robotics

A Vacuum Cleaner for Space

Catching a rogue satellite. image European Space Agency (ESA)

A Singapore-based venture company aspiring to enter the space business unveiled a life-sized model of a satellite that would retrieve space debris, with which the company plans to conduct a test run in orbit in 2019 and to make commercially viable by 2020.  “Space is filled with trash, and if things continue as they have, space exploration will no longer be sustainable. …

Most orbital debris is old satellites and satellite components. Around 750,000 pieces of space debris at least 1 centimeter in diameter are said to be in near-Earth orbit, and are interfering with countries’ and companies’ efforts to place new satellites. Astroscale’s debris retrieval satellite closes in on dead satellites, and uses magnets to draw them in. The device then enters the atmosphere, bringing the out-of-commission satellite with it, and burns up on re-entry.

For example, in 2009 an out-of-commission Russian military satellite and a satellite launched by a U.S. corporation collided. The International Space Station (ISS) is frequently forced to change course or have its crew members evacuate from their posts. In 2007, China destroyed one of its own satellites with a missile, producing large volumes of orbital shrapnel and triggering international criticism.

Also in 2007, the United Nations Committee on the Peaceful Uses of Outer Space (COPUOS) drafted the Space Debris Mitigation Guidelines, which recommends that satellites that are past their usefulness promptly leave their orbits. However, satellites and satellite parts that have already become space debris have uncoordinated trajectories, and because there is no established method of retrieving such litter, various countries and companies have been searching for a solution.

The Japan Aerospace Exploration Agency (JAXA) is working on a plan to attach metallic string to space debris, through which it would pass electric currents and use the Earth’s magnetic field to slow down the debris, and then drop them into the atmosphere. Meanwhile, the RIKEN research institute announced in 2015 that it had devised a method of using high-intensity lasers to slow down “drifting” litter so that they would hurtle into the atmosphere.  Researchers both within and outside Japan have proposed various other ideas, including making space debris attach to operating satellites and catching space debris with nets.

Company to test space-debris-retrieval satellite in 2019, aim to commercialize by 2020, Mainichi Japan, July 15, 2017

Commercial Experimenting on Space

space robotics

Space News reported on May 17, 2017 that a top Pentagon research official said that satellite servicing offers an opportunity for the government to foster close relationships with industry that allow companies to lead development of new technologies, rather than requiring them to abide by DOD guidelines. DARPA is currently partnering with Space Systems Loral to develop the Robotic Servicing of Geosynchronous Satellites (RSGS) program, and DARPA Tactical Technology Office Director Bradford Tousley said that the arrangement illustrates how the Pentagon can leverage “robust commercial space base” for technology development.

Excerpts from Satellite servicing a chance for industry-first development, DoD official says , Space News, May 17, 2017