总辐射表性能评价

PERFORMANCE EVALUATION FOR PYRANOMETERS

根据WMO和ISO关于对总辐射表的性能指标的要求 ,对我国气象观测台站使用的总辐射表 (型号为DFY4和TBQ - 2 )进行了全面的性能测试。主要考核了灵敏度和长期稳定性 ,以及非线性、温度特性、余弦响应、方位响应、倾斜响应、时间响应、零位漂移等对灵敏度的影响。通过大量的实验数据和分析研究 ,得出了总辐射表测量误差的主要来源 ,这对于控制仪器质量 ,提高太阳总辐射测量的准确度以及对太阳辐射的研究是非常有益的。

The performance of two models pyranometer (model DFY4 and model TBQ-2) made in China has been tested. We have mainly studied the long-term stability of sensitivity, nonlinearity, temperature dependence, directional response (cosine and azimuth), tilt effect,response time and et al. Sensitivity and response time are tested in outdoor exposure and others are tested on the laboratory test facility for solar radiation instruments. In our measurements we used a personal computer in conjunction with data logger and output of instruments can be measured and processed automatically. Model PSP pyranometer made in EPPLEY laboratory of USA is used as a reference instrument and its dissemination of the value of the quantity can be trace back to WRR. Main error for pyranometers is concluded according to a great of test data and analysis. It is very useful for observation and study of solar radiation.