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A data processing algorithm for the perforated shadow band incorporating a ray trace model of pyranometer exposure

机译:结合了总辐射计曝光的射线迹线模型的穿孔阴影带的数据处理算法

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A preliminary assessment of perforated shadow band performance is given under partly cloudy and overcast conditions. Decomposition of daily 1-minute pyranometer data into diffuse and global values and subsequent reconstitution of the separate curves is achieved using an interpolating algorithm and a ray trace model of pyranometer exposure. Accuracy of the reconstituted curves relative to reference data is a strong function of clearness index, KT, with a reduction in relative error for KT < 0.3 and KT > 0.7. As expected, algorithm performance degrades under highly variable conditions, when interpolation fails to capture the instantaneous fluctuations in irradiance associated with clouds drifting into the sun path.
机译:在部分多云和阴天条件下,对穿孔的阴影带性能进行了初步评估。使用插值算法和辐射强度图曝光的射线迹线模型,可以将每日1分钟的日射强度计数据分解为扩散值和全局值,然后重新构建单独的曲线。相对于参考数据,重构曲线的准确性是清晰度指标KT的重要函数,而KT <0.3和KT> 0.7时,相对误差会降低。如预期的那样,当插值无法捕获与飘移到太阳路径中的云有关的辐照度的瞬时波动时,算法性能在高度可变的条件下会下降。

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