Group Calibration of Silicon Cell Pyranometers for Use in an Automated Network

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  • 1 Center for Agricultural Meteorology and Climatology; Institute of Agriculture and Natural Resources, University of Nebraska, Lincoln, Nebraska
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Abstract

Techniques for simultaneously calibrating a number of pyranometers for use with automated weather stations are examined. The pressure involves taking data from an Eppley precision spectral pyranometer and from up to 11 LI-COR pyranometers using a specially built sensor plate. Results of a group calibration of six pyranometers using 10-minute data over a 3-day period are given. Three best-fit lines were determined for full-scale (5–960 W m−2), midscale (300–650 W m−2) and midrank (400–800 W m−2) datasets. The full-scale calibration technique proved most useful, resulting in a standard error of estimate of less than 20 W m−2 in all cases.

Abstract

Techniques for simultaneously calibrating a number of pyranometers for use with automated weather stations are examined. The pressure involves taking data from an Eppley precision spectral pyranometer and from up to 11 LI-COR pyranometers using a specially built sensor plate. Results of a group calibration of six pyranometers using 10-minute data over a 3-day period are given. Three best-fit lines were determined for full-scale (5–960 W m−2), midscale (300–650 W m−2) and midrank (400–800 W m−2) datasets. The full-scale calibration technique proved most useful, resulting in a standard error of estimate of less than 20 W m−2 in all cases.

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