VIPER MSolo Vibe Test. The Mass Spectrometer Observing Lunar Operations (MSolo) for NASAs VIPER mission is being prepared for a vibration test inside a laboratory in the Neil Armstrong Operations and Checkout Building at NASAs Kennedy Space Center in Florida on Nov. 8, 2022. Exposing the instrument to vibration environments that it might see during launch helps engineers to find issues prior to liftoff. MSolo is a commercial off-the-shelf mass spectrometer modified to work in space and it will help analyze the chemical makeup of landing sites on the Moon, as well as study water on the lunar surface. MSolo will be part of NASAs first Commercial Lunar Payload Delivery Service (CLPS) mission where under the Artemis program, commercial deliveries will be used to perform science experiments, test technologies and demonstrate capabilities to help NASA explore the Moon and prepare for human missions.