Importing and merging meterological wind data

Question

Hello.

I have a number of data sets that were generated by data loggers on wind turbines that I need to merge with a meteorological data set that possesses directional data. The difficulty is the data that was generated by the data loggers occurred at 10 minute intervals on :03, :13, :23, :33, :43, :53, and the date and time appear in different columns with the following format i.e.  01/03/2008, 1:53:17 PM, respectively.

The met data occurred only once each hour, on the top of the hour on :00, and is formatted with the date and time in the same column i.e. 12/30/2008 11:00 AM

Is there someway to merge these records by creating a rule that inserts the met data into the data logger file where:

- the date & time are placed in separate columns (this is the data logger convention and the format of my hundreds of data files)
 - a new row is created for each :00 time stamp

???

Many thanks for any pointers you can offer here.

unknown · Answer

Hi thanks for the ideas.

Ja, I've been messing around and trying to use what's in front of me w/JMP.

My data is from the Warwick Wind Trials for my MSc thesis project. Unfortunately, it's proprietary. I'm merging it with Birmingham Airport data.

If you don't know about this, there is some data from the Portland, OR, USA area. http://nextgen.pdx.edu/data.raw.php

afterword · Answer

I've faced similar situations before and found it helpful to "average" the 10 minute data on the database side using an avg(data), group by (YYYYMMDD HH24) SQL command.

If  you've only got files from the data loggers and can't use a database, you could create a "key" field on each table and join them in JMP.  The key on the wind turbine table could be something like year(date)||month(date)||day(date)||hour(time) to be joined with the weather data key year(dateTime)||month(dateTime)||day(dateTime)||hour(dateTime).

That should make two equivalent, unique character strings for each hour in each table. I'm positive there are other, more elegant ways of going about this, but this is a method I've used to handle JMP's treatment of time data.

By the way, where is your weather data coming from?  I'm always looking for useful sources.

unknown · Answer

Sorry, I'm still giving this client a test-run. I guess I could use the join in JMP that's similar to UNIX, yes?