SOLAR RADIATION 



219 



Table 5. — Hourly Averages of the Total Solar Radiation Received on a 



Horizontal Surface for Weeks That Include the Summer and Winter 



Solstices, the Equinoxes, and the Times When the Solar Declination 



Is Halfway between These Extremes 



1. Miami, Florida 



Hours from noon*. 



Dec. 23, 

 Feb. 18, 

 March 21, 



April 21, 

 June 21, 

 Aug. 22, 

 Sept. 23, 

 Oct. 24, 



A.M. 



P.M. 



A.M. 

 P.M. 



A.M. 

 P.M. 



A.M. 

 P.M. 



A.M. 

 P.M. 



A.M. 

 P.M. 



A.M. 

 P.M. 



A.M. 



P.M. 



43.8 



61.1 



66.5 



67.3 



66.8 



65.5 



61.4 



50.4 



43.4 



38.7 



54.1 

 54.0 



64.5 

 60.3 



63.2 

 57.9 



63.7 

 62.1 



63 2 

 61.6 



64.5 

 55.2 



51.9 

 42 6 



39.7 

 35.6 



41.3 

 42.7 



57.2 

 53.1 



60.4 

 47.6 



60.6 

 67.9 



58.6 

 50.2 



55.2 

 46.2 



49.3 

 33.1 



26.7 

 25.2 



34.8 

 30.9 



41.7 

 40.8 



43.6 

 36.9 



49.4 

 41.1 



49.0 

 41.9 



45.5 

 31.2 



41.4 

 22.0 



15.3 

 12.1 



21.0 

 18.9 



24.3 

 24.6 



31.1 

 24.4 



38.3 

 29.9 



32. 

 29. 



31.0 

 20.5 



31.5 

 13.1 



5.8 

 3.2 



5.0 

 6.8 



11.0 

 11.0 



17.9 

 12.8 



23.0 

 17.6 



16.7 

 14.0 



15.3 

 9.5 



17.2 

 4.1 



0.7 



2.3 

 2.6 



7.0 

 4.9 



9.2 

 9.3 



5.8 

 5.0 



4.6 



1.2 



6.3 



2.6 

 1.6 



2. Washington, D. C. 



* Probably noon, 75th meridian 

 in April and June, and 36 minutes 



time, which is about 20 minutes faster than local solar time at Miami 

 faster in late October and early February. 



