 In support of the preparation of new mission concepts, or development and operations of each ESA approved Earth Observation mission, the Division conceives, initiates and conducts supporting scientific studies (in house and external) to ensure that the mission is "fit for purpose".In addition, the Division organises, coordinates and executes Campaigns for the purpose of acquiring airborne, balloon-borne, or in-situ data.Campaigns are specifically designed in support of technology or mission concept development, mission development, data simulation, and instrument calibration or product validation purposes.