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The Lunar Gateway is expected to be positioned on-orbit around the Moon or ina Halo orbit at the L2 Lagrange point. The proposed Lunar Gateway is agame-changer for enabling new, high-priority lunar science utilizing Cu-beSatsand presents a refreshing new opportunity for utilization of these smallspacecraft as explorers. In context, CubeSats are being stretched to theirlimits as interplanetary explorers. The main technological hurdles includehigh-bandwidth communications and reliable high delta-v propulsion. Advances indeep-space attitude determination and control has been made possible from therecent NASA JPL MarCO missions. Due to these limitations, CubeSats areprimarily designed to be dropped-off from a larger mission. The limited massand volume have required compromises of the onboard science instruments, longerwait times to send back science data to Earth, shorter mission durations orhigher accepted risk. With the Lunar Gateway being planned to be closer to theMoon, it will provide significant savings for a propulsion system and provide aprimary relay for communication apart from the DSN and enable tele-operatedcommand/control. These three factors can simplify the mission enabling routinedeployment of CubeSats into lunar orbit and enable surface missions. In thispaper, we present preliminary designs of 2 CubeSat lunar landers that willexplore the lunar pits, Mare Tranquilitatis and the remnant magnetic fieldsReiner Gamma.

GNC Challenges and Opportunities of CubeSat Science Missions Deployed from the Lunar Gateway