Abstract
By utilizing a cadmium sulphide (CdS) photoresistor for insolation measurement, a single three-cup anemometer to determine wind speed and a wind vane to monitor wind direction, measurements have been carried out simultaneously at Nsukka, which lies on latitude 6.8°N and longitude 7.35° E for a period of 5 months covering the rainy season. From the results of the measurements, the following graphs were plotted: 1. (1) Average hourly insolation for particular wind direction as a function of local time for each month. 2. (2) Average hourly insolation as a function of average wind speed in different wind directions for each month. 3. (3) Histograms for different wind directions for the period of 5 months. 4. (4) Total average insolation as a function of month of the year. The investigations show that insolation tends to be correlated with wind direction at any particular period during the rainy season.
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