analemma_test is a BASH script which tests analemma.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
analemma, a FORTRAN90 program which evaluates the equation of time, a formula for the difference between the uniform 24 hour day and the actual position of the sun, creating data that can be plotted by gnuplot, based on a C program by Brian Tung.