L波段海水介电模型构建与误差分析

Construction and Error Analysis of L-band Seawater Dielectric Model

摘要:

基于实验室测量数据，构建了盐度和温度多项式形式的 L 波段海水介电模型，并采用最小二乘法和奇异值分解技术求解模型系数。将新模型与目前广泛使用的 Klein-Swift（KS）模型、Meissner-Wentz（MW） 模型以及 George Washington University（GWU）模型进行比较。结果表明：新模型计算的海水介电常数与实验室测量数据的 RMSE 误差为 0.09（实部）和 0.25（虚部），均优于 KS、MW、GWU 模型。

关键词:介电常数;亮温;海面盐度;L 波段

Abstract:

Based on laboratory measurement data，a L-band seawater dielectric model in the form of salinity and temperature polynomials is constructed，and the coefficient of the model is solved by least square method and singular value decomposition technique. The new model is compared with the currently widely used Klein-Swift （KS）model，Meissner-Wentz（MW）model，and George Washington University（GWU）model. The results show that the RMSE errors between the new model values and the measured data are 0.09（real part）and 0.25（imaginary part），which are better than KS，MW and GWU models.

Key words:dielectric constant;bright temperature;sea surface salinity;L-band