. [Sonokard objectives are stated to (0) study the feasibility of obtaining the maximum of data through computer processing of records obtained overnight, (0) systematically record the crewmember's physiological functions during sleep, (0) study the feasibility of obtaining real-time crew health data. Investigators believe that contactless acquisition of cardiorespiratory data over the night period could serve as a basis for developing efficient criteria for evaluating and predicting adaptive capability of human body in long-duration space flight.]  