Abstract: The present disclosure discloses an GNSS-R earth surface survey device and method. By configuring a GNSS signal receiving antenna capable of receiving signals at respective frequencies corresponding to different GNSS systems, and at the same time, acquiring, during an intermediate frequency extraction stage and through independent channels, direct signals and reflected signals of respective different frequencies so as to obtain digital intermediate frequency signals; selecting, based on a user setting or a signal strength, a GNSS system to be used to process data; and obtaining, by analyzing a Doppler frequency shift and a time delay of the digital intermediate frequency signal, a difference of the GNSS reflected signal with respect to the GNSS direct signal, thereby obtaining earth surface data through inversion on the basis of the same. In this way, the present disclosure enables compatibility with different GNSS system signals at the same time for earth surface survey.

Abstract: In a GNSS signal receiving antenna, a radiation pattern of an antenna unit of the antenna includes four sub-patterns that form a rectangular shape and each of the sub-patterns comprises a first part, a second part and a third part communicated with each other. The first part is communicated with the second part and the second part is communicated with the third part. The four sub-portions form a rectangular shape with an end portion of the third part of each sub-pattern disposed opposite to a side portion of the first part of a next adjacent sub-pattern. The four sub-patterns are not communicated with each other. The GNSS signal receiving antenna can receive both a traditional right-handed circularly polarized signal and a left-handed circularly polarized signal. Multiple antenna units may form an array antenna for directional GNSS signal reception.