D is the total number of days in a year. Default is 365.
20
Expression 21: "D" equals 365D=365
negative 10−10
400400
21
A is the inclination of Earth's axis with respect to the plane of Earth's orbit. Default is 23.44 degrees.
22
Expression 23: "A" equals 82.2A=82.2
negative 85−85
8585
23
S is the offset of the start of the year: the number of days after the winter solstice that the year begins. Default is 11 days.
24
Expression 25: "S" equals 11S=11
negative 10−10
365365
25
T is a "truncation" function: its outputs lie between %u20131 and 1.
26
Expression 27: "T" left parenthesis, "x" , right parenthesis equals left brace, "x" greater than 1 : 1 , "x" less than negative 1 : negative 1 , negative 1 less than or equal to "x" less than or equal to 1 : "x" , right braceTx=x>1:1,x<−1:−1,−1≤x≤1:x