CAJ | 학술논문

　　该文利用数值仿真手段分析了全球导航卫星系统海面反射(GNSS-R)信号的时延相关功率曲线特征，讨论了风速、风向、GNSS卫星高度角、接收机平台高度和速度等因素对海面散射信号相关功率的影响，给出了GNSS-R海面风速的反演方法和技术流程，并进行了试验验证。结果表明，在中低风速条件(<20 m/s)下，GNSS-R测量的海面风速与实测风速的基本一致，说明 GNSS-R 探测海面风速的可行性以及该文给出的海面风速反演方法的正确性。当风速超过20 m/s时，由于受海浪谱模型的限制，其反演的结果明显低于实测风速。最后，根据试验结果，初步给出了GNSS-R测量海面风速的修正模型。
　　해문이용수치방진수단분석료전구도항위성계통해면반사(GNSS-R)신호적시연상관공솔곡선특정，토론료풍속、풍향、GNSS위성고도각、접수궤평태고도화속도등인소대해면산사신호상관공솔적영향，급출료GNSS-R해면풍속적반연방법화기술류정，병진행료시험험증。결과표명，재중저풍속조건(<20 m/s)하，GNSS-R측량적해면풍속여실측풍속적기본일치，설명 GNSS-R 탐측해면풍속적가행성이급해문급출적해면풍속반연방법적정학성。당풍속초과20 m/s시，유우수해랑보모형적한제，기반연적결과명현저우실측풍속。최후，근거시험결과，초보급출료GNSS-R측량해면풍속적수정모형。
This paper introduces the mechanism of sea surface wind measurement using Global Navigation Satellite System Reflection (GNSS-R) signal and sea surface scattered signal theoretical model. Then the delay waveform of sea surface scattered signal is analyzed through numerical integration, and the influence of wind speed, wind direction, GNSS satellite elevation angle, receiver height and receiver speed on this delay waveform is discussed in detail. Based on the above analysis, the algorithm of GNSS-R sea surface wind retrieval is proposed. In order to validate the mechanism of GNSS-R measuring sea surface wind and the accuracy of this algorithm, Hurricane Dennis is used to test. The result shows that GNSS-R wind speed is generally consistent with the observational data for the low-moderate wind speed (<20 m/s) and is less than the observational data for high wind speed (>20 m/s). Finally, the correction model of GNSS-R wind speed is initially proposed on the basis of the experimental results.