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Intercomparison of Satellite-Derived Solar Irradiance from the GEO-KOMSAT-2A and HIMAWARI-8/9 Satellites by the Evaluation with Ground Observations
Remote Sensing ( IF 5 ) Pub Date : 2020-07-04 , DOI: 10.3390/rs12132149
Chang Ki Kim , Hyun-Goo Kim , Yong-Heack Kang , Chang-Yeol Yun , Yun Gon Lee

Solar irradiance derived from satellite imagery is useful for solar resource assessment, as well as climate change research without spatial limitation. The University of Arizona Solar Irradiance Based on Satellite–Korea Institute of Energy Research (UASIBS-KIER) model has been updated to version 2.0 in order to employ the satellite imagery produced by the new satellite platform, GK-2A, launched on 5 December 2018. The satellite-derived solar irradiance from UASIBS-KIER model version 2.0 is evaluated against the two ground observations in Korea at instantaneous, hourly, and daily time scales in comparison with the previous version of UASIBS-KIER model that was optimized for the COMS satellite. The root mean square error of the UASIBS-KIER model version 2.0, normalized for clear-sky solar irradiance, ranges from 4.8% to 5.3% at the instantaneous timescale when the sky is clear. For cloudy skies, the relative root mean square error values are 14.5% and 15.9% at the stations located in Korea and Japan, respectively. The model performance was improved when the UASIBS-KIER model version 2.0 was used for the derivation of solar irradiance due to the finer spatial resolution. The daily aggregates from the proposed model are proven to be the most reliable estimates, with 0.5 km resolution, compared with the solar irradiance derived by the other models. Therefore, the solar resource map built by major outputs from the UASIBS-KIER model is appropriate for solar resource assessment.

中文翻译:

地面观测评估对GEO-KOMSAT-2A和HIMAWARI-8 / 9卫星衍生的太阳辐射的比对

卫星图像产生的太阳辐射可用于太阳能资源评估以及不受空间限制的气候变化研究。亚利桑那大学基于卫星的太阳辐照度–韩国能源研究所(UASIBS-KIER)模型已更新至2.0版,以便采用新的卫星平台GK-2A产生的卫星图像,该平台于2018年12月5日发射。与针对COMS卫星进行了优化的先前版本的UASIBS-KIER模型相比,针对韩国在两个时空,每小时和每天的时间尺度上对UASIBS-KIER模型2.0版的卫星得出的太阳辐射进行了评估。 。UASIBS-KIER模型版本2.0的均方根误差(针对晴空太阳辐照度进行了标准化)范围为4.8%至5。当天空晴朗时,瞬时时间比例为3%。对于多云的天空,位于韩国和日本的站点的相对均方根误差值分别为14.5%和15.9%。当使用UASIBS-KIER模型版本2.0来推导太阳辐照度时,由于具有更好的空间分辨率,模型性能得到了改善。与其他模型得出的太阳辐照度相比,该模型提出的每日总量被证明是最可靠的估计,分辨率为0.5 km。因此,由UASIBS-KIER模型的主要输出构建的太阳能资源图适用于太阳能资源评估。当使用UASIBS-KIER模型版本2.0来推导太阳辐照度时,由于具有更好的空间分辨率,模型性能得到了改善。与其他模型得出的太阳辐照度相比,该模型提出的每日总量被证明是最可靠的估计,分辨率为0.5 km。因此,由UASIBS-KIER模型的主要输出构建的太阳能资源图适用于太阳能资源评估。当使用UASIBS-KIER模型版本2.0来推导太阳辐照度时,由于具有更好的空间分辨率,模型性能得到了改善。与其他模型得出的太阳辐照度相比,提出的模型的每日总量被证明是最可靠的估计,分辨率为0.5 km。因此,由UASIBS-KIER模型的主要输出构建的太阳能资源图适用于太阳能资源评估。
更新日期:2020-07-05
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