Convert hours, minutes, seconds to days. (double precision)
ihour int hours imin int minutes sec double seconds
*days double interval in days *j int status: 0 = OK 1 = ihour outside range 0-23 2 = imin outside range 0-59 3 = sec outside range 0-59.999...
1) The result is computed even if any of the range checks fail. 2) The sign must be dealt with outside this routine. P.T.Wallace Starlink 26 October 1993