Title

Determination of atmospheric turbidity from the diffuse-beam broadband irradiance ratio

Abstract

A semi-physical method is proposed to evaluate turbidity from broadband irradiance measurements and other atmospheric parameters. This method demonstrates the utility of diffuse data when estimating atmospheric composition with broadband irradiance data. An error analysis and various tests against measured data show that this method can predict accurate turbidities provided that the sky is perfectly cloudless and the diffuse irradiance data are very accurate. Yet, this method is insensitive to errors in input data such as precipitable water and ozone amount. Applications of this method to the quality control of radiation data are discussed. Tests with actual data from Florida and Oregon show good agreement with other methods. Evaluation of the model required a detailed discussion of the accuracy and cosine error of pyranometers, and the uncertainty in precipitable water estimates.

Publication Date

9-1-1998

Publication Title

Solar Energy

Volume

63

Issue

3

Number of Pages

135-146

Document Type

Article

Identifier

scopus

DOI Link

https://doi.org/10.1016/S0038-092X(98)00065-6

Socpus ID

0032172777 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0032172777

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