The IPEx Autonomy Test-Site: Terrestrial Testing of Autonomous Excavation in Lunar South Pole Conditions

NASA's Artemis program aims to send humans to the lunar south pole (LSP), requiring in-situ resource utilization (ISRU) technologies like the ISRU Pilot Excavator (IPEx) to perform site preparation and resource extraction. The LSP is a uniquely challenging environment, characterized by low solar angles and long shadows that disrupt vision-based autonomy. To approximate these conditions, we developed the IPEx autonomy test-site, a 21.3×33.5 m enclosed area for testing excavation technologies under simulated LSP conditions. The test-site is equipped with granular material, scattered rocks, and a full-scale lander model. Strategically placed high-power lights replicate the low solar angles, while a motion capture system offers ground truth robot poses. Additional site awareness cameras provide complete coverage of the test area for monitoring. The test-site has been utilized to evaluate performance of both autonomous navigation and excavation tasks. Finally, we discuss initial results obtained from test runs, calculations compared against a digital simulation, features of the terrain that mimic the visual properties of lunar regolith, and challenges observed.