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首页> 外文期刊>Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of >Preliminary Analysis of the Potential and Limitations of MICAP for the Retrieval of Sea Surface Salinity
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Preliminary Analysis of the Potential and Limitations of MICAP for the Retrieval of Sea Surface Salinity

机译:初步分析MICAP潜力和局限性反演海面盐度

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摘要

A new payload concept has been proposed: the microwave imager combined active/passive (MICAP). MICAP is a combined one-dimensional microwave interferometric radiometer that operates at 1.4, 6.9, 18.7, and 23.8 GHz and L-band (1.26 GHz) scatterometer. It has the capability to simultaneously remotely sense sea surface salinity (SSS), sea surface temperature (SST), and wind speed. MICAP will be a candidate payload onboard the Ocean Salinity Satellite led by the State Oceanic Administration of China to monitor SSS and reduce geophysical errors caused by surface roughness and SST. To provide an “all-weather” estimation of SSS with high accuracy from space, the errors of the simultaneous retrieval of multiparameters using MICAP are analyzed, and noise levels and stability requirements of instruments are estimated. Preliminary analysis shows that MICAP can provide SSS with an accuracy of 1 psu for single measurement and 0.1 psu over the global ocean for 200 × 200 km resolution pixels and one month at middle and low latitudes with default instrument noises (0.1 K, 0.3 K and 0.3 K for the L, C, and K band radiometers, respectively, and 0.1 dB for the L-band scatterometer) while uncertainties of the drift corrections are less than the radiometer sensitivities.
机译:提出了一种新的有效载荷概念:组合式主动/被动微波成像仪(MICAP)。 MICAP是一种组合式一维微波干涉辐射计,工作频率为1.4、6.9、18.7和23.8 GHz,以及L波段(1.26 GHz)散射仪。它具有同时遥感海面盐度(SSS),海面温度(SST)和风速的功能。 MICAP将是由中国国家海洋局领导的海洋盐度卫星上的候选有效载荷,以监测SSS并减少由表面粗糙度和SST引起的地球物理误差。为了从空间提供高精度的SSS“全天候”估计,分析了使用MICAP同时检索多参数的误差,并估计了噪声水平和仪器的稳定性要求。初步分析显示,对于200×200 km分辨率的像素,MICAP可以为SSS提供单次测量精度为1 psu的精度,在全球海洋上的精度为0.1 psu,在中低纬度为一个月的默认仪器噪声(0.1 K,0.3 K和L,C和K波段辐射计分别为0.3 K和L波段散射仪为0.1 dB),而漂移校正的不确定性小于辐射计的灵敏度。

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