A method of determining the long-oil pollution of the sea surface using microwave radiolokato ra

摘要

The method further definition of oil pollution of the sea surface by means of a microwave radar shore and sea-based with the construction of the transverse configuration of contamination within the first Fresnel zone, the radar signal is irradiated sea surface on background objects oil extraction and transportation (hereinafter objects) - potential sources of contamination, and objects themselves, create a reflected signal from the oil film in the spot within the first Fresnel zones that form the indirect reflected signal which falls on the objects is reflected from them, enters the radar antenna interferes with the direct reflected from the object signal to form a sum signal, the level and the spectral characteristics of which are compared to the level and the spectral characteristics of the sum signal obtained in the absence of prior objects oil spills, these signals are compared at placing conditions similar microwave radar, with the construction of the transverse configuration spots within the first Fresnel zone, characterized in that the electromagnetic sounding of the sea surface is carried out on two multiple frequencies ωi ω, recovered at the receiving reflected from the sea surface signals of the two frequencies delayed signal with a frequency ωna during its propagation up to the sea surface and back, a signal with a frequency ωprivodyat to ω frequency and then converted by using frequency oscillator voltage is isolated voltage intermediate frequency ω = ω-ω, multiplies it with the delayed signal with frequency ω, is isolated harmonic voltage in a stable local oscillator frequency ω, limiting so his;该方法利用微波雷达岸基进一步确定海面石油污染，并以海基第一菲涅尔带内污染物的横向构造为基础，将雷达信号照射到海面背景物体上提取石油。ND运输（以下对象）——潜在的污染源以及物体本身，从第一菲涅耳区域内的点内的油膜中产生反射信号，该反射信号形成从物体上反射的间接反射信号，进入雷达天线干扰从物体信号中直接反射，从而形成suM信号，其电平和频谱特性与在没有先验物体溢油情况下获得的和信号的电平和频谱特性进行比较，这些信号在放置条件类似微波雷达的情况下与横向锥体的构造进行比较。第一菲涅耳带内的成形点，特征在于，海面的电磁测深是在两个多频率i上进行的，在频率na的两个频率延迟信号的海面信号传播到海面和bac期间，从两个频率延迟信号的海面信号反射的接收处恢复。K一个频率为的原极信号经频率振荡器电压转换后被隔离电压中频=_-_，与延迟信号乘以频率，在稳定的本振频率，限幅内被隔离谐波电压。婷如此