Drone Radar Uncovers Hidden Earth Glaciers Aiding Mars Water Search

A team of researchers at the University of Arizona has demonstrated a new method for mapping buried glaciers on Earth using drone-mounted ground-penetrating radar, a breakthrough that could aid future missions to locate accessible water on Mars. The study, published in the Journal of Geophysical Research: Planets, provides critical insights into how debris-covered glaciers—common in mid-latitude regions of Mars—can be analyzed for their ice content and depth.

Mapping Hidden Ice with Drone Technology

The research focused on terrestrial analogs—debris-covered glaciers in Alaska and Wyoming—that closely resemble Martian glaciers. These glaciers, unlike their exposed counterparts, are obscured by thick layers of rock and sediment, making them difficult to study using traditional methods. The team equipped drones with ground-penetrating radar (GPR) to measure the thickness of the debris layer and the underlying ice, a technique that could be replicated in future Mars missions.

Roberto Aguilar, a doctoral researcher at the University of Arizona’s Lunar and Planetary Laboratory and the study’s first author, emphasized the importance of this data for future exploration. If you want to make decisions about where to drill on Mars, you need to know if the ice you’re trying to find is under one meter of debris or 10. That’s the kind of information a drone-based system could provide.

The fieldwork involved challenging conditions, including remote locations, rugged terrain and logistical hurdles such as charging drone batteries with generators. Despite these obstacles, the team successfully mapped the internal structure of glaciers like the Sourdough Rock Glacier in Alaska and the Galena Creek Rock Glacier in Wyoming. The results confirmed that drone-based radar can effectively resolve both the depth of the debris layer and the underlying ice, a capability that could be crucial for in-situ resource utilization (ISRU) on Mars.

Implications for Mars Exploration

Debris-covered glaciers on Mars are of particular interest because they may contain large reserves of water ice, a vital resource for future human missions. Unlike Earth, where glaciers are often exposed, Martian glaciers are typically buried under layers of rock and dust, making them harder to detect and analyze. The University of Arizona team’s work suggests that drone-based radar could be a viable solution for mapping these hidden ice deposits.

The study builds on previous research that highlighted the potential of Martian glaciers as a water source. A 2025 study using NASA’s Shallow Radar (SHARAD) instrument on the Mars Reconnaissance Orbiter found that many of these glaciers are composed of nearly pure water ice, making them a promising target for future exploration. However, the challenge has been determining the thickness of the overlying debris, which can vary significantly and affect the feasibility of accessing the ice.

The drone-based approach offers a scalable and efficient way to gather this data. Unlike surface-based radar systems, which require physical access to the glacier, drones can cover large areas quickly and provide high-resolution data. This could be especially useful for identifying optimal drilling sites on Mars, where mobility and resource constraints will be significant challenges.

Technical Challenges and Future Applications

The research also addressed some of the technical hurdles associated with drone-based radar. For example, the team had to account for the effects of rocky debris on radar signals, which can scatter or absorb the waves and complicate data interpretation. By testing the system on Earth-based analogs, the researchers were able to refine their methods and improve the accuracy of their measurements.

The success of the Ingenuity Mars helicopter, which demonstrated the feasibility of powered flight on the Red Planet, has further bolstered the case for drone-based exploration. The University of Arizona team’s work suggests that drones equipped with GPR could be a valuable tool for future Mars missions, particularly those focused on resource identification and extraction.

Beyond Mars, the technology could also have applications on Earth. Debris-covered glaciers are found in mountainous regions worldwide, including in warmer climates like Colorado and California, where they play a role in water storage and climate regulation. Improved mapping techniques could enhance our understanding of these glaciers and their response to climate change.

Next Steps for the Research

The University of Arizona team plans to continue refining their drone-based radar system, with a focus on improving its resolution and expanding its capabilities. Future tests may include more complex environments, such as glaciers with thicker debris layers or those located in extreme conditions. The goal is to develop a system that can be deployed on Mars with minimal modifications, providing astronauts with a reliable tool for locating and accessing water ice.

As space agencies and private companies prepare for crewed missions to Mars, the ability to identify and utilize local resources will be critical. Water ice, in particular, is a high-priority target because it can be used for drinking, oxygen production, and even rocket fuel. The University of Arizona’s research represents a significant step toward making these resources accessible, bringing the dream of sustainable human exploration of Mars one step closer to reality.