4.9 - Front Date File (*.fd)
The StateCU frost date file contains the last days in the spring when the average monthly temperature values
are below 28 degrees and 32 degrees Fahrenheit, and the first days in the fall when the average monthly temperature
values are below 28 degrees and 32 degrees Fahrenheit. The frost date data file is required for monthly and daily
ET methods. Frost date data is provided for each climate station for years
t2, described below.
Missing data is accepted using a –999 place holder. The file must contain values (or -999) for all years in the
nyr2, defined in the model control file (see Section 4.4). There must be a one-to-one
correspondence between climate stations listed in the climate station data file (*.cli) and climate data included
in the frost date file. An example is provided in Appendix A.
|Row 1||Format (6x, i4, 11x, i4, 7x, a3)|
|1-1||t1||Beginning year of frost date data|
|1-2||t2||Ending year of frost date data|
|1-3||idum3||CYR for calendar year|
|Row 2||Format (i4, 1x, a10, 5x, a5, 3(3x,a5))|
|2-2||tid||Frost station ID|
|2-3||fd1||Spring 28 degree frost date|
|2-4||fd2||Spring 32 degree frost date|
|2-5||fd3||Fall 32 degree frost date|
|2-6||fd4||Fall 28 degree frost date.|
Repeat for the number of temperature stations.
Repeat for each year