Data Quality Reports for Session: 146674 User: yaoyunjun Completed: 12/25/2012

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050718.2PYE/ECOR/M1 - Reprocessed: Wind direction offset correctedpye30ecorM1.b1
D080125.4PYE/ECOR/M1 - Flux Data Suspect For Some Wind Directionspye30ecorM1.b1


DQRID : D050718.2
Start DateStart TimeEnd DateEnd Time
04/08/2005000007/20/20051748
Subject:
PYE/ECOR/M1 - Reprocessed: Wind direction offset corrected
DataStreams:pye30ecorM1.b1
Description:
The SMET wind direction was consistently 15 to 20 degrees larger than the wind direction 
determined by the ECOR. The ECOR was mistakenly aligned to magnetic north during this 
period.

The magnetic declination is 14 deg. 58 min., which explains most of the difference.

The ECOR data for this period were reprocessed in November 2006 to add 15 degrees to the 
wind direction.  No other changes were made to the data. The reprocessed data were 
archived in January 2007.
Measurements:pye30ecorM1.b1:
  • wind_dir

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DQRID : D080125.4
Start DateStart TimeEnd DateEnd Time
02/01/2005000009/15/20052330
Subject:
PYE/ECOR/M1 - Flux Data Suspect For Some Wind Directions
DataStreams:pye30ecorM1.b1
Description:
For some wind directions the horizontal fetch was not representative 
of the field in which the AMF was located.  Therefore, for the wind 
direction ranges 66-92 (buildings and trees) degrees, the fluxes are 
affected by insufficient fetch and  surfaces, buildings, or vegetation 
that are not similar to the local field conditions.
Measurements:pye30ecorM1.b1:
  • friction velocity(ustar)
  • Latent heat flux(lv_e)
  • CO2 flux(fc)
  • Corrected sensible heat flux(h)

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