Retrieval of Significant Wave Height and Mean Sea Surface Level Using the GNSS-R Interference Pattern Technique: Results From a Three-Month Field Campaign
Retrieval of Significant Wave Height and Mean Sea Surface Level Using the GNSS-R Interference Pattern Technique: Results From a Three-Month Field Campaign
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DOI：
10.1109/tgrs.2014.2371540
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发表时间：
2015-06-01
影响因子：
8.2
通讯作者：
Martin, Francisco
中科院分区：
文献类型：
--
作者：
Alonso-Arroyo, Alberto;Camps, Adriano;Martin, Francisco
自1993年欧洲航天局（欧空局）提议将全球导航卫星系统反射信号用于海洋中尺度测高以来，出现了广泛的应用。利用干涉图样技术（IPT）反演了一个地基试验的有效波高（SWH）和平均海面高度（MSSL）。分析了IPT上的两个不同的观测量：振荡频率和相干性丢失的角度。反射过程中的相干性丢失的点可以与光滑表面的瑞利准则相关，并且有助于确定SWH。对干涉图样的光谱分析有助于确定MSSL。在西班牙巴达洛纳的“蓬特德尔石油”码头进行了为期三个月的实地活动，以了解反射的全球导航卫星系统信号如何受到沿海海况的影响，并检查以前的假设。结果表明，从这个现场实验，证实SWH可以检索精度为6厘米和MSSL与4厘米。大约每30分钟获得两个参数的估计值。
Since 1993, when the European Space Agency (ESA) proposed the use of Global Navigation Satellite Systems reflected signals for sea mesoscale altimetry, a wide range of applications have appeared. This paper focuses on the retrieval of significant wave height (SWH) and the mean sea surface level (MSSL) from a ground-based experiment using the interference pattern technique (IPT). Two different observables on the IPT are analyzed: the oscillation frequency and the angle where coherency is lost. The point where coherency in the reflection process is lost can be related to the Rayleigh criterion for smooth surfaces and helps to determine the SWH. Spectral analysis on the interference pattern helps to determine the MSSL. A three-month field campaign was performed on the "Pont del Petroli" pier, Badalona, Spain, to see how the reflected GNSS signals were affected by coastal sea state and check previous assumptions. Results from this field experiment are shown, confirming that the SWH can be retrieved with accuracy of 6 cm and the MSSL with 4 cm. Estimations of both parameters are obtained every 30 min approximately.