A data collection device for locating an interference source in a target area when the ground interference frequency is known, the data collection device being intended to be on board a satellite, the data collection device including: - telemetric reception means able to receive by telemetry the interference ground frequency; - at least three antenna points (2, 3, 4) arranged on the satellite so as to be capable of receiving a radiofrequency signal from the target area; - processing means able to determine the amplitude of the interference signal at each of the antenna points (2, 3, 4), the processing means including: o an agile filter able to select a target frequency band in the signal received by one of the antenna points (2, 3, 4) and to convert it into a signal having an intermediate frequency band, the target frequency band containing the interference ground frequency; o digital processing means able to: ▪ convert the signal having an intermediate frequency band into a digital signal and ▪ determine a frequency bin in which the interference frequency at the satellite is located; ▪ determine, in this frequency bin, for each of the signals received by each of the antenna points (2, 3, 4), the interference amplitude at each of the antenna points (2, 3, 4); - connecting means able to connect each of the antenna points (2, 3, 4) to the processing means. - telemetric reception means able to receive by telemetry the interference ground frequency; - at least three antenna points (2, 3, 4) arranged on the satellite so as to be capable of receiving a radiofrequency signal from the target area; - processing means able to determine the amplitude of the interference signal at each of the antenna points (2, 3, 4), the processing means including: o an agile filter able to select a target frequency band in the signal received by one of the antenna points (2, 3, 4) and to convert it into a signal having an intermediate frequency band, the target frequency band containing the interference ground frequency; o digital processing means able to: ▪ convert the signal having an intermediate frequency band into a digital signal and ▪ determine a frequency bin in which the interference frequency at the satellite is located; ▪ determine, in this frequency bin, for each of the signals received by each of the antenna points (2, 3, 4), the interference amplitude at each of the antenna points (2, 3, 4); o an agile filter able to select a target frequency band in the signal received by one of the antenna points (2, 3, 4) and to convert it into a signal having an intermediate frequency band, the target frequency band containing the interference ground frequency; o digital processing means able to: ▪ convert the signal having an intermediate frequency band into a digital signal and ▪ determine a frequency bin in which the interference frequency at the satellite is located; ▪ determine, in this frequency bin, for each of the signals received by each of the antenna points (2, 3, 4), the interference amplitude at each of the antenna points (2, 3, 4); ▪ convert the signal having an intermediate frequency band into a digital signal and ▪ determine a frequency bin in which the interference frequency at the satellite is located; ▪ determine, in this frequency bin, for each of the signals received by each of the antenna points (2, 3, 4), the interference amplitude at each of the antenna points (2, 3, 4); - connecting means able to connect each of the antenna points (2, 3, 4) to the processing means.