Episode 8

Constellations & Radio Astronomy: A Review

6 November 2026
16:00 – 17:30 CET – Online participation

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Constellations & Radio Astronomy: A Review

One of the most dramatic developments in space is the emergence of constellations of tens of thousands of low-Earth-orbiting satellites for broadband connectivity, Earth imaging and other valuable applications.  As these constellations deploy and many more are proposed, a host of implications for the space ecosystem and questions from other space actors have emerged.  The astronomy community voiced its concerns early on, both that the visibility of LEO satellites could hamper optical observations of space phenomena and that the more active radio frequency use would affect radio astronomy observations.

For the past seven years, the astronomy and satellite communities have engaged actively to identify technical, operational and design mitigations that permit both satellites and astronomy to co-exist, and international organizations have engaged to facilitate the dialogue and explore solutions.

In this episode of Space Connect, we will explore the state of that collaboration between radio astronomers and satellite constellation projects, discuss the most effective tools and techniques to co-exist, and the focus for future work, including in the agenda for the 2027 ITU World Radiocommunication Conference. We’ll also outline national approaches to protect sensitive radio astronomy sites while still ensuring the surrounding communities enjoy the benefits of connectivity.


Agenda – Episode 8

16:00 – 16:05
Introduction

Presentation of the session and the panelists by the Moderator

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​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Patricia Cooper

Episode Moderator

ITU

16:05 – 16:45
Panelists’ Presentations

Overview presentation: Brief overview of radio‑frequency interference between low-Earth-orbit satellite constellations and radio astronomy observations.

Ashley

Ashley Vanderley

Senior Advisor

Office of International Science & Engineering

U.S. National Science Foundation

Challenges presentation: SKAO observations in South Africa and Australia — space science goals and threats from satellite transmissions

Federico Di Vruno

Federico Di Vruno

SKAO Spectrum Manager

IAU CPS Co-Director

Industry Collaboration and ITU Studies:  Required and voluntary actions for constellation operators to mitigate impacts on radio astronomy sites, and next steps for more effective coordination.

Chris

Chris Hofer

Head

International Spectrum Management & Strategy

Amazon Leo

National Approaches and Community Considerations: SARAO’s activities in South Africa and the nation’s approach to balancing the expansion of Africa’s largest and most powerful radio astronomy facility with the connectivity needs of nearby communities.

Busang

Busang Sethole

Analyst

Spectrum & Telecommunications

South African Radio Astronomy Observatory (SARAO)

16:45 – 17:05
Interactive panel discussion
17:05 – 17:25
Audience Q&A session
17:25 – 17:30
Wrap-Up and session close

Speakers

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​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Patricia Cooper

Episode Moderator

ITU

Ashley

Ashley Vanderley

Senior Advisor

Office of International Science & Engineering

U.S. National Science Foundation

Chris

Chris Hofer

Head

International Spectrum Management & Strategy

Amazon Leo

Federico Di Vruno

Federico Di Vruno

SKAO Spectrum Manager

IAU CPS Co-Director

Busang

Busang Sethole

Analyst

Spectrum & Telecommunications

South African Radio Astronomy Observatory (SARAO)


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E4 – Beyond the Horizon: Framing the Future of Space Communications

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