subroutine w3reddat(it, rinc, dinc)
This subprogram reduces an ncep relative time interval into one of seven canonical forms,...
subroutine w3difdat(jdat, idat, it, rinc)
Returns the elapsed time interval from an NCEP absolute date and time given in the second argument un...
function iw3jdn(IYEAR, MONTH, IDAY)
Computes julian day number from year (4 digits), month, and day.