  The Lunar Gateway is expected to be positioned on-orbit around the Moon or in
a Halo orbit at the L2 Lagrange point. The proposed Lunar Gateway is a
game-changer for enabling new, high-priority lunar science utilizing Cu-beSats
and presents a refreshing new opportunity for utilization of these small
spacecraft as explorers. In context, CubeSats are being stretched to their
limits as interplanetary explorers. The main technological hurdles include
high-bandwidth communications and reliable high delta-v propulsion. Advances in
deep-space attitude determination and control has been made possible from the
recent NASA JPL MarCO missions. Due to these limitations, CubeSats are
primarily designed to be dropped-off from a larger mission. The limited mass
and volume have required compromises of the onboard science instruments, longer
wait times to send back science data to Earth, shorter mission durations or
higher accepted risk. With the Lunar Gateway being planned to be closer to the
Moon, it will provide significant savings for a propulsion system and provide a
primary relay for communication apart from the DSN and enable tele-operated
command/control. These three factors can simplify the mission enabling routine
deployment of CubeSats into lunar orbit and enable surface missions. In this
paper, we present preliminary designs of 2 CubeSat lunar landers that will
explore the lunar pits, Mare Tranquilitatis and the remnant magnetic fields
Reiner Gamma.
