关于GNSS-R干涉复场相干时间
On the GNSS-R Interferometric Complex Field Coherence Time
摘要：
本文研究了微波双站散射过程，目的是推导出静止平台上干涉复场自关联函数的表达式。我们从菲涅耳积分开始，推导出夫琅和费和修正夫琅和费体系中的自关联函数。在短时间内的自相关函数可以表示为具有方向依赖时间尺度的高斯。定向调制是散射方向和波向之间的角度的函数。所获得的关系可以用于使用一个或多个GNSS-R海岸接收器的定向海况估计。
英文摘要：
In this paper we focus on the microwave bistatic scattering process, with the aim of deriving an expression for the interferometric complex field auto-correlation function from a static platform. We start from the Fresnel integral and derive the auto-correlation function in the Fraunhofer and Modified Fraunhofer regime. The autocorrelation function at short times can be expressed as a Gaussian with a direction dependent time scale. The directional modulation is a function of the angle between the scattering direction and the wave direction. The obtained relation can be used for directional sea state estimation using one or more GNSS-R coastal receivers.
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