CADRE Test Rovers in the Mars Yard

Two full-scale development model rovers that are part of NASA's CADRE (Cooperative Autonomous Distributed Robotic Exploration) technology demonstration drive in the Mars Yard at the agency's Jet Propulsion Laboratory in Southern California in August 2023. The project is designed to show that a group of robotic spacecraft can work together as a team to accomplish tasks and record data autonomously – without explicit commands from mission controllers on Earth.

The rovers being tested here are similar in size and appearance to the flight models – still being built at the time of this image – that will travel to the Moon. Equipped with flight software and autonomy capabilities, these development models were used for drive tests outside the clean room. In this image, one rover is fitted with a stand-in for solar panels, while the other rover is not.

A series of Mars Yard tests with the development models confirmed CADRE hardware and software can work together to accomplish key goals for the project. The rovers drove together in formation. Faced with unexpected obstacles in the way, they adjusted their plans as a group by sharing updated maps and replanning coordinated paths. And when one rover was low on battery charge, the whole team paused so they could later continue together.

Several drives were performed at night under large flood lamps so the rovers could experience extreme shadows and lighting that approximate what they'll encounter during the lunar daytime.

Figure A: a single development model during a Mars Yard test in October 2023.

Figure B: two development models (both with solar panel stand-ins) during the same October 2023 test.

A division of Caltech in Pasadena, California, JPL manages the CADRE technology demonstration project for the Game Changing Development program within NASA's Space Technology Mission Directorate in Washington. CADRE will launch as a payload on the third lunar lander mission by Intuitive Machines, called IM-3, under NASA's CLPS (Commercial Lunar Payload Services) initiative, which is managed by the agency's Science Mission Directorate, also in Washington. The agency's Glenn Research Center in Cleveland and its Ames Research Center in Silicon Valley, California, both supported the project. Motiv Space Systems designed and built key hardware elements at the company's Pasadena, California, facility. Clemson University in South Carolina contributed research in support of the project.

For more about CADRE, go to: https://www.jpl.nasa.gov/missions/cadre