All function codes are defined in the solpos.h file. Multiple functions may be or'd to create a composite function switch. Specifying only the functions for required output variables may allow solpos to execute more quickly. See the soltest.c program for other examples.
Forces solpos to use the time and date from the interval midpoint.
Solar elevation angle, deg. Kt, Kn, etc. Factor that denormalizes Kt', Kn', etc. Solar zenith angle, deg.