26. OK, now to merge in the US stations. First, wrote 'us2cru' to convert
the marksusanonwmocru.dat file to the 'standard' format we're using. That
worked OK. Then used 'addnormline' to, well - add a normals line. Only 17
out of 1035 stations ended up with missing normals, which is pretty good!
The with-normals US database file is tmp.0704251654.dat.
Now, I knew that using mergedb as it stands would not work. It expects to
be updating the existing records, and actions like 'addnew' require OPS
to confirm each one. So I thought it best to add an OPS clause to auto-
confirm additions where there's no WMO match and the data density is OK,
say 50% or higher. Unfortunately, that didn't work either, and rather than
spend even more time debugging mergedb.for, I knocked off simpleaddnew.for,
which adds two non-overlapping databases. The resultant file, with all
three partial databases, is tmp.0704271015.dtb.