****README*****

                                                      Barry Schwartz
                                                      NOAA/FSL
                                                      March 1998



This readme file explains how to use the code to interpolate the 40-km RUC-2
2-D output to the 60-km RUC-I grid.

The code is located in this directory and is totally self contained; 
i.e., the one subroutine it needs is located in the same file. The file
is called "i40_60.for"

The transformation involves using an NMC routine called W3FB11. This 
routine is located in the above named file. You will need to also get a
file called "latlon.mps" this file contains the latitude and 
longitudes of the RUC-1 60-km grid points needed by W3FB11. On this 
same directory you will find "latlon.mps" or you can obtain a similar file
on our web page. Keep in mind that the file we have on this directory and 
on the web is a flat ascii unformatted file (written with an unformatted
fortran write statement). My example program shows you how to read this
file.

Now, all you need is a file (it can be of any type; in our example we use
an unformatted "flat" ascii file written with an unformatted fortran
write statement) of 40-km RUC-2 data. Read your data into an array 
(in the example program the data array is called precip) 
dimensioned (151,113) which is the RUC-2 domain. 

Take a look at the example program's output array. This is where your
interpolated data on the RUC-1 grid will be located. It is up to you to
either write out this array or simply pass the array to a plotting routine
or whatever. we interpolate by using the "nearest grid point" so it isn't
exact but good enough. You'll see how in the code.

Good luck. I make no claims that you'll get it to work nor will I be 
responsible for getting you to do the right thing! I put this out as a service,
not an expressed guarantee of success.