10 Minute Text Files for M4 Have Duplicate Information

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Everett.Perry
Posts: 33
Joined: Tue Jan 29, 2013 9:53 am
Organization: Texas Tech University
Location: Oregon

10 Minute Text Files for M4 Have Duplicate Information

Postby Everett.Perry » Thu Sep 12, 2013 3:59 pm

I noticed a problem with some of the M4 10 minute text files. The files from October 2011 to November 2012 have duplicate information.

For example, for “2011_December.txt”, the end of the file should be “31-12-2011 23:50:00”. Immediately following 23:50, data is repeated from “17-12-2011 01:40:00” and continues until “31-12-2011 23:50:00”.

To see this, go here: http://wind.nrel.gov/MetData/135mData/M4Twr/10min/mat/
And download Dec, 2011.

This pattern is similar for all of the files mentioned. After what should be the end of the file, data is repeated starting from some random place within the file. You can actually spot the problem files because they seem to be about twice the size of the other files.

Also, the text files are normally comma delimited. However, the repeated data has an extra space with the comma in each field. The repeated data is also 1 field short and does not have the final flag value.

This does not seem to affect the 10 minute MAT files and does not seem to affect the M5 tower. The M4 10 minute text data looks to still be usable, just have to trim the file when the end of month is reached.

Everett
Everett Perry
PhD Candidate, National Wind Institute
Texas Tech University

Andy.Clifton
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Joined: Wed Feb 29, 2012 3:13 pm
Organization: NREL
Location: Boulder, CO
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Re: 10 Minute Text Files for M4 Have Duplicate Information

Postby Andy.Clifton » Thu Sep 12, 2013 5:52 pm

Thanks for that. I'll delete the old files and replace the data this evening to see if that fixes this.
Andy Clifton, Ph.D.
Senior Engineer

Everett.Perry
Posts: 33
Joined: Tue Jan 29, 2013 9:53 am
Organization: Texas Tech University
Location: Oregon

Re: 10 Minute Text Files for M4 Have Duplicate Information

Postby Everett.Perry » Fri Sep 13, 2013 7:47 am

It looks like that fixed the problem.

The file size is right, formatting is fixed, all flags are present, and no duplicate information. Problem solved!

Everett
Everett Perry
PhD Candidate, National Wind Institute
Texas Tech University


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