Data Quality Reports for Session: 121077 User: mfarm Completed: 07/28/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080313.1SGP/ECOR/E24 - Water Vapor Density Incorrectsgp30ecorE24.b1
D080526.1SGP/ECOR/E10 - Incorrect CO2 fluxessgp30ecorE10.b1
D080604.2SGP/ECOR/E14 - Sensor failuresgp30ecorE14.b1


DQRID : D080313.1
Start DateStart TimeEnd DateEnd Time
03/01/2008000004/12/20080230
Subject:
SGP/ECOR/E24 - Water Vapor Density Incorrect
DataStreams:sgp30ecorE24.b1
Description:
Mean Water Vapor Density (mean_q) often did not trend well with the co-located SMOS and 
sometimes jumped downwards approximately 200 to 300 mmol/m^3.  Some of the instances were 
clearly a result of contamination by precipitation, but others were not; the latent heat 
flux was sometimes affected.

It was determined that all instances of this behavior from the beginning of 2008 through 
the beginning date of this DQR were caused by precipitation/dew/frost.
Measurements:sgp30ecorE24.b1:
  • Water vapor density (q)(mean_q)
  • latent heat flux(lv_e)

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DQRID : D080526.1
Start DateStart TimeEnd DateEnd Time
05/10/2008113006/25/20081500
Subject:
SGP/ECOR/E10 - Incorrect CO2 fluxes
DataStreams:sgp30ecorE10.b1
Description:
The analog CO2 signal from the LI-7500 to the sonic anemometer became very noisy and 
incorrect CO2 fluxes resulted. Sonic anemometer was replaced.
Measurements:sgp30ecorE10.b1:
  • CO2 flux(fc)

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DQRID : D080604.2
Start DateStart TimeEnd DateEnd Time
04/02/2008133006/05/20081930
Subject:
SGP/ECOR/E14 - Sensor failure
DataStreams:sgp30ecorE14.b1
Description:
The water vapor output of the LI-7500 was too low, indicating that water vapor leaked into 
the sensor and that the chemicals are spent or there was an electronic failure.

Latent heat flux was not normally affected by this problem.
Measurements:sgp30ecorE14.b1:
  • Water vapor density (q)(mean_q)

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