Abstract: A control system for an atmospheric balloon system includes a navigation parameter system having a meteorological characteristic input, a balloon kinematic monitor, an objective input and a parameter range generator configured to generate an altitude search range for the atmospheric balloon system based on air stream vectors, balloon kinematics, and a target balloon position. An onboard balloon control system is in communication with the navigation parameter system and includes a comparator to determine a course difference of a measured course relative to a course range. An altitude selection module selects a target altitude within the altitude search range having an air stream vector that decreases the course difference. A propulsion selection module is configured to select a propulsion value that decreases the course difference.