Amazon’s Project Kuiper and the U.S. National Science Foundation (NSF) have formalized a satellite coordination agreement aimed at reducing the impact of broadband satellites on ground-based astronomical research. The deal sets protocols to mitigate interference with optical, infrared, and radio telescopes while enabling Project Kuiper to deploy its low Earth orbit (LEO) satellite constellation to deliver global broadband coverage.
The agreement builds on ongoing technical collaboration between Project Kuiper, NSF’s NOIRLab and NRAO, and the broader U.S. astronomy community. It incorporates guidance from the International Astronomical Union’s Centre for the Protection of the Dark and Quiet Sky and covers a range of mitigation strategies. For optical astronomy, these include limiting orbital altitude to 700 km or below, reducing satellite brightness through design and maneuvering, and sharing high-precision ephemerides. For radio astronomy, it enables dynamic beam avoidance in key frequency ranges, protection of observatory receivers, and technical coordination despite not being a Federal Communications Commission (FCC) requirement.
The agreement also reflects progress from Kuiper’s initial 2024 prototype launches, including one satellite specifically engineered for low optical visibility. As Project Kuiper continues toward full constellation deployment, the dynamic framework will evolve alongside satellite and astronomy technologies, ensuring long-term coexistence between space-based internet infrastructure and astronomical science.
- Formal NSF-Kuiper agreement supports both broadband expansion and astronomical research
- Addresses optical, infrared, and radio interference with U.S. observatories
- Aligns with best practices from the IAU’s Dark and Quiet Skies guidance
- Includes collaboration on downlink interference, orbital data sharing, and laser impact mitigation
- Builds on Kuiper’s prototype satellites, including one designed for brightness reduction
“We appreciate Project Kuiper and other commercial satellite companies working with NSF to help maintain our ability to explore the wonders of our universe through the unique capabilities of astronomical research facilities worldwide,” said Chris Smith, interim director of the NSF Division of Astronomical Sciences.
“We’ve been engaged with the astronomy community since the initial design and development of Project Kuiper,” added Chris Hofer, Head of International Spectrum Management and Strategy at Project Kuiper. “This agreement underscores our commitment to responsible space operations and our belief that satellite broadband and ground-based astronomy can successfully coexist.”
