NASA Develops Collision-Avoidance Systems for Moon
NASA and its partners are developing advanced collision-avoidance systems for spacecraft operating in lunar orbit and on the Moon's surface. These systems rely on multi-sensor fusion, combining data from radar, optical navigation, and inertial units. The effort is driven by the increasing complexity of lunar operations and the lack of traditional navigation aids, requiring innovation in autonomous, real-time control software.
- This effort is part of a broader framework called LunaNet, a NASA-led initiative to create a network of communication, navigation, and detection services for lunar missions. LunaNet is designed with an open architecture, allowing international partners and commercial companies like Astrobotic and ispace to contribute their own network nodes. - The navigation challenges in the lunar environment are substantial due to its uneven gravity field, the lack of a global magnetic field, and extreme lighting conditions that can confuse visual navigation systems. Unlike Earth, there is no existing GPS-like infrastructure, requiring a new approach for positioning, navigation, and timing (PNT). - A key technology being advanced is Navigation Doppler Lidar, which measures a spacecraft's velocity and motion relative to the ground with high precision. This is part of the Safe and Precise Landing – Integrated Capabilities Evolution (SPLICE) project, which also develops advanced sensors, cameras, and high-performance computing for autonomous landing. - The system will utilize a Delay/Disruption Tolerant Networking (DTN) protocol to ensure data can be stored and forwarded if direct communication links are temporarily unavailable, a crucial feature for operating on the far side of the Moon or in rugged terrain. - The planned Lunar Gateway space station will be a central node in this network, orbiting the Moon in a Near-Rectilinear Halo Orbit (NRHO) to maintain a continuous line of sight with Earth. This orbit is nearly stable but requires regular station-keeping maneuvers. - The U.S. Space Force is also involved in developing cislunar space domain awareness through programs like Oracle, which will launch satellites to monitor the region between Earth and the Moon. This is a collaborative effort involving NASA, the Intelligence Community, and the Department of Defense. - Commercial partners are playing a significant role through the Commercial Lunar Payload Services (CLPS) program, which contracts private companies to deliver payloads to the lunar surface. These missions provide opportunities to test and deploy new navigation and communication hardware. - To enhance ground-based monitoring, Astrobotic is developing a digital telescope called Clavius-S, designed to be deployed on the Moon's surface to track spacecraft and debris from a unique vantage point that avoids the glare that can blind Earth-based sensors.
