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SpaceX: Working with the astronomy community to reduce Starlink satellite brightness

via:凤凰网     time:2022/7/31 16:00:52     readed:153

SpaceX has released a document called "Brightness Mitigation Best Practices for Satellite Operators," outlining how IT is working with the astronomy community to reduce light pollution and how IT is reducing Starlink satellite brightness.

SpaceX has been criticized and reviled by astronomers for the brightness of its Starlink satellites since their launch, the House of IT knows.

SpaceX noted that by working together, it has identified and mitigated the key causes of the satellite's brightness. The company is working to make the satellite "invisible to the naked eye" at its standard operating altitude.

SpaceX stressed that the work of the astronomy community is not only important, but will continue to work with them to reduce the impact on all satellite operations. "As a space exploration company, SpaceX is a strong supporter of astronomy and the scientific community."

SpaceX has enhanced the specular design of its Starlink satellites to avoid diffuse reflection of light, according to the company. SpaceX also points out that not all materials are highly reflective, and some can absorb or make the reflected light less bright.

In addition, SpaceX has used designs such as sun shields and radiofrequency permeable mirror membranes to reduce the problem of scattering sunlight.


For the first generation of satellites, SpaceX also specifically developed a sun shield. According to the paper, they are made of a material that engineers specifically developed to be invisible to radio frequencies.

In addition, SpaceX has developed the RF transparent mirror membrane as an alternative to the sun visor. The film scatters most of the sunlight away from the Earth. SpaceX says it has been refining its mirror membrane to reduce the amount of light reflected back to Earth.

It's also worth noting that SpaceX has improved the support material between its batteries compared to the first generation of satellites. The simple answer is to change the white material to a dark red material. The downside is that darkening the material increases the temperature of the solar array, which degrades the performance.

SpaceX notes that its second-generation satellites will add more capacity to the Starlink network; Support more users in more places.

The second generation will use three advanced brightness technologies, such as dielectric mirror membranes, which can reduce brightness by 90 percent.

SpaceX 分享了它如何让 Starlink 卫星变得不那么明亮。

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