Development and Application of the Quasi-realtime Daylight Source Model based on Geostational Meteorological Satellite Images

日光模拟工具和各种天气条件下的日光可用性数据对于设计具有良好节能和光环境质量的建筑是必不可少的。尽管世界上正在开发有用的日光模拟工具，但日光光源模型不足以满足研究和实践的需要。关于太阳辐射和日光可用性的现有数据库和数值模型通常以有限数量的气象观测站和采光测量站的地面观测测量数据为基础。由于建立和运营这样一个站点的资金困难，太阳辐射和日光可用数据倾向于国家气象台或主要科研院所所在的城市和国家。作为地面观测的替代方法，作者提出了利用IMA…建立太阳总辐射和束流太阳辐射的统计模型日本地球静止气象卫星GMS-5的更多GE。该模型建立在多元线性回归分析的基础上，根据卫星观测图像的值估计地面观测的每小时累积总辐射值和波束辐射值。该模型与传统的卫星模型的主要区别在于它利用了气象卫星图像的三个通道。将传统方法中唯一使用的可视通道转换为表示云的光学厚度的反照率。红外通道对应于云层的高度。水汽通道接近对流层的相对湿度。三个通道的组合有望提供比以往任何时候更详细的大气信息。该项目的目的是开发基于地球静止气象卫星图像的准实时日光光源模式。首先，它检查了通过地球静止气象卫星图像的三个通道估计每小时间隔的全球和波束辐照度和照度的统计模型的精度。在福山大学测得的卫星图像与瞬时照度和辐照度之间进行了多元线性回归分析。通过对气象条件的分析，研究了影响精度的原因。应用日光光源模型估算了日光可利用性的地理分布。较少

Both daylighting simulation tools and daylight availability data for various weather conditions are essential to design an architecture with energy efficiency and luminous environment of good quality. Though there are useful daylighting simulation tools being developed in the world, daylight source models are insufficient for the needs for both research and practice. Existing databases and numerical models on solar radiation and daylight availability are usually based on the measured data by surface observations at the limited number of meteorological observatories and daylighting measurement stations. Because of the financial difficulty to set up and operate such a station, the solar radiation and daylight availability data incline to the cities and countries where national meteorological observatories or major research institutes are located.As the alternative approaches of surface observations, the author proposed a statistical model for global and beam solar radiation using the ima … More ges of Japanese geostational meteorological satellite GMS-5. The model is based on the multiple linear regression analysis to estimate surface observed hourly cumulative global and beam radiation values from the satellite observed image values. The major difference of the model and the traditional satellite-derived models is that it utilizes the three channels of meteorological satellite images. The visual channel, the only one used in the traditional method, is converted to the albedo representing the optical thickness of cloud. The infrared channel corresponds to the height of cloud deck. The water vapor channel approximates the relative humidity of the troposphere. The combination of three channels has been expected to provide more detailed information on the atmosphere than ever.The purpose of the project is to develop the Quasi-realtime Daylight Source Model based on Geostational Meteorological Satellite Images. First, it examines the precision of a statistical model to estimate global and beam irradiance and illuminance at hourly intervals by the three channels of the geostational meteorological satellites images. The multiple liner regression analysis is performed between the satellites image values and instantaneous illuminance and irradiance measured at the Fukuyama University. By the weather condition analysis, causes reducing the precision are studied. The daylight source model is applied to estimate the geographical distribution of daylight availability. Less