Abstract: A communication control system for controlling communication with a flying object that is taking off or landing, includes a control system including a computation device that executes a prescribed process, and a storage device that is connected to the computation device, and a flying object that communicates with the control system via a base station. The control system stores a radio map indicating a radio quality of each position and each flight altitude of the flying object and each base station. With reference to the radio maps of a plurality of altitudes, a base station that has a favorable radio quality is selected on a taking-off and landing route in a taking-off and landing port.

Abstract: Provided is an altitude calculation method for a flying body including calculating an altitude of the flying body by using information on horizontal coordinates of the flying body, a reception signal strength of a radio signal, and altitude calculation auxiliary information obtained in advance.