An integrated GNSS remote sensing instrument and its first GNSSR airborne experiment

This paper presents the latest development of NSSC's integrated GNSS remote sensing instrument. This new instrument is flexible designed for a variety of GNSS science needs based on the successful GNOS receiver, but with more functional modules. The goal of this instrument is to be put onboard of future Chinese space-borne platforms to provide precise position and timing information for high-demand space missions and to monitor ionosphere, atmosphere and the earth's surface. A DDM module was developed based on FFT, as a part of the instrument, to receive the reflected signal from a wide code and frequency range. The stored data could be used to study the state of sea and land. An airborne experiment was carried out in order to verify the performance of the module. The retrieval results show consistency with the on-site observables.