redundant data makes getting just the appended data difficult

Is there an (easy) implementation of ncl which will accept two netCDF
files. The first has five minutes (approximately) of metar data by site
and time-of-observation and the second file has the same five minutes
plus another five minutes of more observations. By the end of the hour,
I have a 9Mb netCDF file which takes forever to process in order to get
the data I need.

I have in mind some "process" that would give me a file (or array) of
those observation records that are new and not duplicated in both of the
two files.

I could use some ideas to get started or would like to hear if anyone
else has already done something like this.

Thanks,
Donna
Texas A&M University

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Received on Sat Jun 06 2009 - 22:30:16 MDT