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通常利用双尺度模型计算海面微波辐射的原则是,先计算大波斜率密度函数对电磁扰动权函数的影响,再引入海面毛细重力波谱的效应.电磁扰动权函数与海面毛细重力波谱无关,而且海浪长波谱和毛细重力波谱可以根据分界波数分开计算;依据这一点,推导并获得了一个简单的计算海面微波辐射的新模型.依据该模型,海面微波辐射可以表示为电磁扰动权函数对海面曲率谱的积分,其优点是电磁扰动权函数和海面曲率谱对亮温的作用可以进行分解研究.基于该模型,进一步讨论了利用多频全极化辐射计反演海面毛细重力波谱的可行性.
Generally, the principle of calculating the microwave radiation in the sea surface by using the two-scale model is to calculate the influence of the large-slope slope density function on the electromagnetic disturbance weighting function and then introduce the effect of the capillary gravity spectrum on the sea surface. The electromagnetic disturbance weighting function has nothing to do with the capillary- Based on this, a new model for calculating the microwave radiation in the sea surface is deduced and obtained.According to this model, the microwave radiation in the sea surface can be expressed as a function of the electromagnetic disturbance weighting function on the sea surface curvature spectrum The advantage of this method is that the function of electromagnetic perturbation weight function and sea surface curvature spectrum can study the brightness temperature.Based on this model, the feasibility of retrieving sea surface capillary gravimetric spectrum by multi-frequency all-polarimeter is discussed further.