Direct Beam Solar Radiation. A Digital Computer program,

摘要

A digital computer program is described that provides bihourly direct beam solar radiation values (langleys/minute) and daily totals (langleys) for one or more sites anywhere on the Earth,for one or more days of the year,for eight different atmospheric transmissivity values. The site may have arbitrary elevation above sea level,and the horizon may be arbitrarily modified topographically;the plane of the site may have arbitrary inclination from the horizontal,including vertical. The program gives the (truc solar) times of sunrise and sunset,as well as of the beginning and conclusion of other topographic obstructions of the Sun. Care has been taken in the FORTRAN coding to enhance the ease of installation of the program on the widest possible selection of computers,both existing and anticipated,of the preparation of input data and the use of the output data,and of possible modification of the program to serve specialized purposes.