Search found 33 matches

by Everett.Perry
Fri Dec 13, 2013 11:10 am
Forum: NWTC Wind Data
Topic: M5 20Hz Data Missing Last File Each Day
Replies: 6
Views: 9675

Re: M5 20Hz Data Missing Last File Each Day

It looks like this behavior has started on the M4 tower as of 11/20/2013. M4 (20Hz) is missing the last file for each day starting on 11/20/2013 and continues through 12/11/2013. I decided to post this here in case it is related to the M5 behavior rather than start a new thread. Just a "heads u...
by Everett.Perry
Tue Dec 03, 2013 5:27 pm
Forum: NWTC Wind Data
Topic: M4 & M5 20Hz File Corruption
Replies: 8
Views: 10400

Re: M4 & M5 20Hz File Corruption

Andy,

The 20Hz M4 & M5 data for 2013 is clean of all file corruption. It looks like the file corruption issue is fixed.

Everett
by Everett.Perry
Tue Nov 26, 2013 10:51 am
Forum: NWTC Wind Data
Topic: M4 & M5 20Hz File Corruption
Replies: 8
Views: 10400

Re: M4 & M5 20Hz File Corruption

Andy, Sounds great! I will now verify the entire 2013 M4 & M5 20Hz data sets (even the data I didn't request). This may include downloading about 1/2TB so it may take a few days to download. I will report all findings here. When you finish the 2012 data, let me know and I will download the entir...
by Everett.Perry
Mon Nov 25, 2013 10:44 pm
Forum: NWTC Wind Data
Topic: M4 & M5 20Hz File Corruption
Replies: 8
Views: 10400

Re: M4 & M5 20Hz File Corruption

Hi Andy, I seem to have misplaced a post from you. Perhaps it was edited or deleted and is no longer important. However, I believe you asked me if the M4 corrupt files from July were from July 1st and 2nd (2013 20Hz) . There are corrupt files for these dates but nearly every day of July has corrupt ...
by Everett.Perry
Wed Nov 20, 2013 11:53 am
Forum: NWTC Wind Data
Topic: M4 & M5 20Hz File Corruption
Replies: 8
Views: 10400

Re: M4 & M5 20Hz File Corruption

Hi Andy, Good News: The Jan M5 20Hz (2013) data files are 100% free from corruption (downloaded 2 days ago). However, the M4 July (2013) 20Hz files have the exact same file corruption issues (complete download 2 days ago). There are 738 corrupt files for this month. My program uses a Try/Catch block...
by Everett.Perry
Mon Nov 18, 2013 2:11 pm
Forum: NWTC Wind Data
Topic: 20 Hz sonic anemometer behavior
Replies: 6
Views: 9787

Re: 20 Hz sonic anemometer behavior

Hi Jenni,

I have been following this thread and was wondering if you split this thread up, could you please include if you are seeing the behavior on M4, M5, or both?

Thank you,
Everett
by Everett.Perry
Mon Nov 11, 2013 12:42 pm
Forum: NWTC Wind Data
Topic: M4 & M5 20Hz File Corruption
Replies: 8
Views: 10400

M4 & M5 20Hz File Corruption

Hello, I have noticed that after downloading some of the 20Hz files from the NWTC server, Matlab will not open some of the files and gives a message that the files may be corrupt. The total number of corrupt files is well over 1200 files. I have attached 3 files that show some of the 20Hz corrupted ...
by Everett.Perry
Tue Oct 15, 2013 1:14 pm
Forum: NWTC Wind Data
Topic: Data Acquisition System Updates
Replies: 1
Views: 24099

Re: Data Acquisition System Updates

Hi Andy, This is great news! As someone that is using the 20Hz data almost exclusively these days, I am very excited about these upgrades. With solid 20Hz data and the close proximity between the M4 and M5 towers, this data will likely become one of the premier high frequency data sets on the planet...
by Everett.Perry
Thu Oct 03, 2013 11:46 am
Forum: General
Topic: Government Shutdown
Replies: 1
Views: 8039

Government Shutdown

This is off topic for the Wind Data forum, but I was wondering if the government "shutdown" will affect NREL or the NWTC?

Will posting data to the NWTC website or email communication be affected?

Everett
by Everett.Perry
Fri Sep 13, 2013 7:47 am
Forum: NWTC Wind Data
Topic: 10 Minute Text Files for M4 Have Duplicate Information
Replies: 2
Views: 21287

Re: 10 Minute Text Files for M4 Have Duplicate Information

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
by Everett.Perry
Thu Sep 12, 2013 3:59 pm
Forum: NWTC Wind Data
Topic: 10 Minute Text Files for M4 Have Duplicate Information
Replies: 2
Views: 21287

10 Minute Text Files for M4 Have Duplicate Information

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” a...
by Everett.Perry
Wed Sep 04, 2013 1:56 pm
Forum: NWTC Wind Data
Topic: Staying up to date with what's going on
Replies: 2
Views: 12776

Re: Staying up to date with what's going on

I thought of one more possibility. Andy's document "135-m Meteorological Towers and the National Wind Technology Center" in section 6.4 mentions "Operations Metadata". This information is available upon request (I haven't actually requested this myself). The information looks to ...
by Everett.Perry
Wed Sep 04, 2013 1:38 pm
Forum: NWTC Wind Data
Topic: NWTC Utility Scale Wind Turbines
Replies: 0
Views: 7024

NWTC Utility Scale Wind Turbines

Is it possible to find out if the utility scale wind turbines near the M4 and M5 towers were functioning on a particular day? I know that the actual power output and specific details may be proprietary, but I just want to know if the wind turbines were "on or off". Andy's literature mentio...
by Everett.Perry
Tue Sep 03, 2013 6:20 pm
Forum: NWTC Wind Data
Topic: Possible switch to 10 Hz data collection
Replies: 2
Views: 10396

Re: Possible switch to 10 Hz data collection

Hi Andy, Sorry for the slow response. I apparently "unsubscribed" myself and haven't been receiving updates. My projects should not be affected by 10Hz sampling. I still have data to request for one of my projects (involves my dissertation). 10Hz is not a problem for this work, I just have...
by Everett.Perry
Tue Aug 20, 2013 12:02 pm
Forum: NWTC Wind Data
Topic: Cup Sampling Rate Difference Between M4 & M5
Replies: 4
Views: 9874

Re: Cup Sampling Rate Difference Between M4 & M5

Thanks Andy, Actually I realized that I made a mistake with your plot figure. For some reason I thought that there were 10 minutes between your tick marks, not 10 seconds. This is why I thought you were using some kind of averaging to account for the low number of data points. I understand your figu...

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