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Evaluating calibrations of normal incident pyrheliometers

机译：评估法向入射高温辐射计的校准

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摘要

When an Eppley Normal Incident Pyrheliometer is calibrated against an Eppley Hickey Frieden Absolute Cavity Radiometer, the instrument systematically deviates from the absolute cavity readings. The reason for this deviation is not understood. Comparisons are made between one pyrheliometer and an absolute cavity radiometer on selected clear days over a period of 8 months in Eugene, Oregon. The ratios of the readings from the two instruments are correlated against wind speed, pressure, temperature, relative humidity, beam intensity, and zenith angle to determine if any of these parameters statistically influence the calibration process. Wind speed, pressure, beam intensity, and air mass are shown to be statistically significant factors in determining the responsivity of the normal incident pyrheliometer. The results of these tests are evaluated and discussed. Use of air mass instead of zenith angle is proposed for calibration reports.
机译：当根据Eppley Hickey Frieden绝对腔辐射计校准Eppley正常入射热辐射仪时，仪器会系统地偏离绝对腔读数。这种偏差的原因尚不清楚。在俄勒冈州尤金市经过8个月的选定晴天，比较了一个辐射计和绝对腔辐射计。将两个仪器的读数比率与风速，压力，温度，相对湿度，光束强度和天顶角相关联，以确定这些参数中的任何一个是否统计上影响校准过程。在确定法向入射高温辐射计的响应度时，风速，压力，束强度和空气质量显示为具有统计意义的重要因素。这些测试的结果进行了评估和讨论。建议使用空气质量代替天顶角来进行校准报告。

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