Calibration and Evaluation Retrieving Precision of GNSS-R Data of Satellite NanYue

GNSS-R Ocean and Land circumstance detector carried by NanYue acquired a serial remote sensing data. At first, we introduce the Nanyue Instument detailed hardware design scheme and the specific parameters. Second, by processing these DDM data output by Nanyue, we adopted two-stage calibration algorithm to promote the sea surface wind speed retrieving precision, which is Lla calibration and L1b calibration, we describe the detailed process of the calibration algorithm. We draw a conclusion that using GPS signal achieving a RMSE measuring precision can achieve 2.5297m/s by wind speed below 15m/s and using BD signal achieving a RMSE measuring precision can achieve 2.1435m/s by wind speed below 15m/s.