A method for transmitting information from a synthetic aperture radar satellite to a client receiver , the method comprising steps of: - using a previously stored synthetic aperture radar raw data from a data storage to form the information; - modulating a synthetic aperture radar transmission signal to carry the information; - transmitting the modulated synthetic aperture radar transmission signal from the synthetic aperture radar satellite; - receiving the modulated synthetic aperture radar transmission signal with the client receiver and demodulating the modulated synthetic aperture radar transmission to obtain the information; - determining a transmission timing of the modulated synthetic aperture radar transmission signal from the synthetic aperture radar satellite to the client receiver based on a spatial location of the client receiver and a spatial location of the synthetic aperture radar satellite, based on a directional pattern of a transmission antenna of the synthetic aperture radar satellite; and - receiving an echo signal of the modulated synthetic aperture radar transmission signal in the synthetic aperture radar satellite, wherein the receiving of the echo signal comprises steps of: - processing the received echo signal of the modulated synthetic aperture radar transmission signal for suppressing the modulation; - forming a synthetic aperture radar raw data from the processed echo signal; and - storing the synthetic aperture radar raw data in the data storage for further use. - using a previously stored synthetic aperture radar raw data from a data storage to form the information; - modulating a synthetic aperture radar transmission signal to carry the information; - transmitting the modulated synthetic aperture radar transmission signal from the synthetic aperture radar satellite; - receiving the modulated synthetic aperture radar transmission signal with the client receiver and demodulating the modulated synthetic aperture radar transmission to obtain the information; - determining a transmission timing of the modulated synthetic aperture radar transmission signal from the synthetic aperture radar satellite to the client receiver based on a spatial location of the client receiver and a spatial location of the synthetic aperture radar satellite, based on a directional pattern of a transmission antenna of the synthetic aperture radar satellite; and - receiving an echo signal of the modulated synthetic aperture radar transmission signal in the synthetic aperture radar satellite, wherein the receiving of the echo signal comprises steps of: - processing the received echo signal of the modulated synthetic aperture radar transmission signal for suppressing the modulation; - forming a synthetic aperture radar raw data from the processed echo signal; and - storing the synthetic aperture radar raw data in the data storage for further use. - processing the received echo signal of the modulated synthetic aperture radar transmission signal for suppressing the modulation; - forming a synthetic aperture radar raw data from the processed echo signal; and - storing the synthetic aperture radar raw data in the data storage for further use. <EOS>