The relationship between (Q) total solar radiation, as measured by a solarimeter, and hours
of bright sunshine (n), as measured by a Campbell-Stokes recorder, has been examined on …

A correlation of solar radiation in tropical countries has been established based on
parameters more usually measured than solar radiation itself. The following empirical …

Correlations are suggested for calcula ting the regression coefficients a and b of equation
H'= Ho (a+ b S/S'O> suggested by Hay (Solar Energy, 23, 301, 1979) for global solar …

The monthly average daily totals of global solar radiation on a horizontal surface at Madras
(13° 0′ N, 80° 11′ E) and Kodaikanal (10° 14′ N, 77° 28′ E) during the period 1983 …

Some of the empirical relationships developed for the estimation of global solar radiation
from sunshine and cloudiness data are discussed, and based on data for more than five …

In tropical countries, precipitable water, W, is not a good basis for predicting solar radiation
because of the narrow range of fluctuation in this parameter. Relative humidity, however …

Measurements of global solar irradiance on a horizontal surface at five meteorological
stations in Egypt for three years 1987, 1988, and 1989 are compared with their …

Data from six meteorological stations dispersed widely over Pakistan have been used to
produce a correlation between the monthly means of easily measured sunshine duration …

Sunshine duration hours, minimum and maximum daily temperatures, relative humidity,
mean daily temperatures and specific humidity, all as monthly averages for a 60-month time …

From the daily, weekly and monthly values of Q/QA and n/N the least square regression
constants, a and b in the equation, Q/QA= a+ b (n/N), have been calculated for Madras, Q …