Navigating the Complexity of Space Congestion: A Growing Number of Smaller Satellites and Increased Potential Hazards
Managing the Crowded and Threatened Skies: The Evolution of Space Traffic Monitoring
The traditional Space Traffic Monitoring (STM) system, currently operated by the U.S. Space Force, is undergoing significant changes due to the increasing number of smaller satellites, such as cubesats, and growing threats in orbit. This strain is compounded by issues like "cubesat confusion" and the challenges in tracking increasingly crowded space traffic.
One innovative solution to help address these challenges is a visual transponder called a "blinker"—a small LED device that helps quickly and accurately identify even tiny satellites in orbit. This was developed by the Aerospace Corporation and demonstrated in orbit on a cubesat in 2022.
In parallel, there is an ongoing effort to transition the civil space traffic coordination mission from the Space Force to the National Oceanic and Atmospheric Administration’s (NOAA) Office of Space Commerce (OSC). This transfer, mandated by Space Policy Directive 3 from the Trump administration, aims to move from a defense-run system to a more civilian-regulated framework for space situational awareness (SSA) and traffic management. NOAA’s OSC is developing the Traffic Coordination System for Space (TraCSS), aiming to provide space safety services transparently and openly to all satellite operators. TraCSS was in beta testing by late 2024, with full operational capacity targeted for January 2026.
However, this transition and associated funding have faced challenges, including a proposed zeroing out of funding by the Trump administration’s 2026 budget proposal and concerns by some congressional overseers about duplicative investments. The House Appropriations Committee has encouraged NOAA to integrate existing, U.S. Space Force-proven technologies rather than develop proprietary new systems, indicating the need for close cooperation between the defense and civilian agencies. The budget and political uncertainties threaten the smooth handoff and full development of TraCSS.
Other technological advancements complementing STM include improved optical crosslinks in satellites and investments in ground infrastructure to enhance risk mitigation and real-time space situational awareness, though primarily focused on missile warning constellations and communications among satellites rather than STM alone.
The Space Force, in response to these challenges, is emphasizing the significance of the shift in the STM mission to a civilian organization. The Space Force conducts space traffic monitoring through its Space Surveillance Network, a capability that is fairly robust. However, with the increase in smaller objects like cubesats, the system can become crowded and difficult. The resources for space surveillance are limited, and self-reporting by orbiting objects can help save those resources for high-value assets that need more attention.
The Space Surveillance Network was built for collision avoidance and assumes predictability. However, in a warfighting domain, there is a different assumption that some actors and satellites may try to avoid detection. The incident involving China's testing of a fractional orbital bombardment system in 2021 was a wake-up call for the Space Force. The Space Force needs to be able to fuse data from different detection technologies or phenomenologies to respond effectively to threats.
The Space Force currently has over 200 SSA information sharing agreements, about 30 with allied nations and the remainder with commercial space operators. The traditional STM system, which shares data for free with allied governments and some commercial space operators, is under increasing strain due to the growing numbers of smaller satellites in orbit and growing threats.
The move to transfer the collision avoidance mission to a civilian agency began seven years ago. This situation reflects the growing complexity and importance of managing crowded and threatened orbital environments as space activity rapidly expands.
- The Aerospace Corporation developed a visual transponder called a "blinker" in 2022, a small LED device helping to identify satellites, even tiny ones like cubesats, for the crowded space traffic.
- NOAA’s Office of Space Commerce (OSC) is developing the Traffic Coordination System for Space (TraCSS), aiming to provide space safety services openly to all satellite operators, part of the effort to transition the civil space traffic coordination mission from the Space Force.
- The Space Force needs to be able to fuse data from different detection technologies to respond effectively to threats, as a wake-up call was given by China's testing of a fractional orbital bombardment system in 2021.
- The Space Force conducts space traffic monitoring but the increasing number of smaller objects like cubesats and growing threats in orbit make the system difficult and under increasing strain.
- The Space Force currently has over 200 SSA information sharing agreements, about 30 of them with allied nations and the remainder with commercial space operators, due to the growing numbers of smaller satellites in orbit and growing threats.
- The military, the defense, the space force, the aerospace industry, the science of space and astronomy, environmental science, technology, finance, and even overseas nations are all part of the growing complexities and importance of managing crowded and threatened orbital environments as space activity rapidly expands.
