%0 Journal Article %1 Hay1982 %A Hay, J. E. %D 1982 %J Solar Energy %K basic interval, radiation solar time %N 4 %P 271--278 %T An Assessment of the Uncertainty in Measurements of Solar Radiation %V 29 %X Simultaneous but independent pairs of observations of solar radiation made in close proximity to each other for extended time periods at both Vancouver and Toronto have permitted an objective determination of the uncertainty in measurements of solar radiation. The widely quoted observation error of -.+ 5 per cent for an individual observation is appropriate to an hourly time interval, with the uncertainty showing substantial reduction with increased time averaging. The absolute values of the systematic differences were of similar magnitude (2-2.5 per cent) at the two locations. Both the individual and systematic differences showed marked seasonal and interannual variability,w ith all relativee rrors being greatest in the winter months. However, at both locations the absolute values of these same statistics showed a strong dependence on the observed irradiance. The variability of these discrepancies illustrates the need to specify the basic time interval and irradiance when selecting or quoting a measurement error.

@article{Hay1982, abstract = {Simultaneous but independent pairs of observations of solar radiation made in close proximity to each other for extended time periods at both Vancouver and Toronto have permitted an objective determination of the uncertainty in measurements of solar radiation. The widely quoted observation error of -.+ 5 per cent for an individual observation is appropriate to an hourly time interval, with the uncertainty showing substantial reduction with increased time averaging. The absolute values of the systematic differences were of similar magnitude (2-2.5 per cent) at the two locations. Both the individual and systematic differences showed marked seasonal and interannual variability,w ith all relativee rrors being greatest in the winter months. However, at both locations the absolute values of these same statistics showed a strong dependence on the observed irradiance. The variability of these discrepancies illustrates the need to specify the basic time interval and irradiance when selecting or quoting a measurement error.}, added-at = {2011-09-01T13:26:03.000+0200}, author = {Hay, J. E.}, biburl = {https://www.bibsonomy.org/bibtex/2cd96ea6639a2a63f39ef3de72bc60677/procomun}, file = {Hay1982.pdf:Hay1982.pdf:PDF}, interhash = {1aea53ccad55e919d12167257ff735e3}, intrahash = {cd96ea6639a2a63f39ef3de72bc60677}, journal = {Solar Energy}, keywords = {basic interval, radiation solar time}, number = 4, owner = {oscar}, pages = {271--278}, refid = {Hay1982}, timestamp = {2011-09-02T08:25:25.000+0200}, title = {An Assessment of the Uncertainty in Measurements of Solar Radiation}, volume = 29, year = 1982 }