[G06-5] GNSS reflectometry

[G06-5-05] Wind Direction Retrieval in Airborne Experiments of a GNSS-R Receiver

^○Sheng-Hsiung Ma, Jyh-Ching Juang (National Cheng Kung University, Tainan, Taiwan)

The GNSS reflected signals have been proposed for the remote sensing of sea surface altimetry, ocean wind speed, salinity, soil moisture. A GNSS reflection receiver provides the delay-Doppler map (DDM) as the raw measurement for the retrieval of remote sensing variables. Indeed, the spreading and geometry of the DDM is related to geophysical property of ocean surface. In this paper, the experimental and retrieval results by using a GNSS reflectometry (GNSS-R) receiver are described. The GNSS-R receiver is an indigenous design that is capable of processing reflected GNSS signals and generating the DDM in real time. Two airborne experiment data sets are processed for the retrieval of wind direction. The retrieval results are compared with the measurement result on buoys operated by the Central Weather Bureau of Taiwan. In addition, different retrieval methods are discussed.