Computer Science
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9526042m&link_type=abstract
Unknown
Computer Science
Correlation, Latitude, Longitude, Nigeria, Predictions, Solar Radiation, Sunlight, Diffuse Radiation, Statistical Tests
Scientific paper
Correlations for the city of Lagos (latitude 6.58 deg N, longitude 3.33 deg E) have been found between the records of bright sunshine hours and the daily and monthly components of the total hemispherical solar radiation. Four new models have been developed which include H/H0 as a predictor in the Angstrom type models for the diffuse and beam fractions. They contain the quadratic term of the sunshine index, (n/N) and are given as follows: Q/H0=a+b(H/H0)+c(n/N)+d(n/N)2 Q/H0=a+b(H/H0)+d(n/N)2; Q/H0=a+b(H/H0)+c(n/N)+d(n/N)2; Q/H0=a+b(H/H0)+d(n/N)2; where Q is the diffuse or beam radiation on a horizontal plane. The statistical test carried out showed that the new equations generally improved the prediction of the beam or diffuse components from the Angstrom type equations by over 25%.
Chendo A. C. M.
Maduekwe A. L. A.
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