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Pyrgeometer Calibration via Regression

Pyrgeometer Calibration via Regression. Three PIRs with three thermistors were calibrated against the WISG at DAVOS Other PIRs were then calibrated outdoors against this triad over several weeks via a regression technique using the following equations:.

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Pyrgeometer Calibration via Regression

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  1. Pyrgeometer Calibration via Regression Three PIRs with three thermistors were calibrated against the WISG at DAVOS Other PIRs were then calibrated outdoors against this triad over several weeks via a regression technique using the following equations:

  2. Comparison of Triad Average vs Cox & Albrecht Regression Calibration of PIR

  3. Minute-by-Minute Comparisons

  4. Comparison of Triad Average vs Reda et al. Regression Calibration of PIR

  5. Minute-by-Minute Comparisons

  6. Comparison of Triad Average vs Philipona Regression Calibration of PIR

  7. Minute-by-Minute Comparisons

  8. Conclusions • Assuming the WISG is an absolute reference - Cox and Albrecht produce 2 uncertainties of 3-4 Wm-2 with noticeable diurnal differences - Reda et al. or Philipona produce 2 uncertainties of  1.25 Wm-2 with no large diurnal differences • A problem (Forgan comment) is that the values of these regressed coefs differs significantly from the blackbody+oudoor calibration

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