A data processing device (10; 12) for processing data acquired by a moving body, the moving body including a mechanism that generates a propulsive force, and a measuring instrument that measures strength of at least one direction component of air flow to the moving body during flying, the data processing device (10; 12) comprising: wind information acquisition means (102; 111) for acquiring wind information about an air flow direction and an air flow strength, the air flow direction and the air flow strength being specified by using a measured value measured by the measuring instrument; measurement condition control means for controlling an attitude of the moving body in such a way as to include a direction of the propulsive force in a plane including the specified air flow direction and a direction of gravity; propulsive force identification means for identifying a magnitude of the propulsive force; acceleration acquisition means (101; 114) for acquiring acceleration of the moving body; attitude identification means for identifying an attitude of the moving body; external force estimation means (103; 116) for i) setting a direction of the propulsive force from the identified attitude of the moving body, and ii) estimating magnitude of an external force based on the acquired acceleration, the set direction of the propulsive force, and the identified magnitude of the propulsive force, the external force being force that the moving body receives from the air flow; relationship generation means (104; 117) for generating relationship information, the relationship information being an information about a relationship between the specified air flow strength and the estimated magnitude of the external force; and parameter correction means for correcting at least one parameter based on the generated relationship information, the at least one parameter being used in calculation of at least one of the acceleration by the acceleration acquisition means (101; 114) and the magnitude of the external force by the external force estimation means (103; 116), wherein the relationship generation means (104; 117) is configured to generate relationship information again based on the corrected parameter. wind information acquisition means (102; 111) for acquiring wind information about an air flow direction and an air flow strength, the air flow direction and the air flow strength being specified by using a measured value measured by the measuring instrument; measurement condition control means for controlling an attitude of the moving body in such a way as to include a direction of the propulsive force in a plane including the specified air flow direction and a direction of gravity; propulsive force identification means for identifying a magnitude of the propulsive force; acceleration acquisition means (101; 114) for acquiring acceleration of the moving body; attitude identification means for identifying an attitude of the moving body; external force estimation means (103; 116) for i) setting a direction of the propulsive force from the identified attitude of the moving body, and ii) estimating magnitude of an external force based on the acquired acceleration, the set direction of the propulsive force, and the identified magnitude of the propulsive force, the external force being force that the moving body receives from the air flow; relationship generation means (104; 117) for generating relationship information, the relationship information being an information about a relationship between the specified air flow strength and the estimated magnitude of the external force; and parameter correction means for correcting at least one parameter based on the generated relationship information, the at least one parameter being used in calculation of at least one of the acceleration by the acceleration acquisition means (101; 114) and the magnitude of the external force by the external force estimation means (103; 116), wherein the relationship generation means (104; 117) is configured to generate relationship information again based on the corrected parameter.