Data Quality Reports for Session: 107878 User: nab_essc Completed: 09/20/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060419.4NIM/MWR/M1 - Instrument noise problem/RF interferencenimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1
D060530.1NIM/ECOR/M1 - Data Suspect for NW and East Wind Directionsnim30ecorM1.b1
D060718.1NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating.nimmwrlosM1.b1, nimmwrtipM1.a1
D070215.5NIM/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration By Aircraftnim30ecorM1.b1


DQRID : D060419.4
Start DateStart TimeEnd DateEnd Time
01/15/2006000001/08/20070000
Subject:
NIM/MWR/M1 - Instrument noise problem/RF interference
DataStreams:nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1
Description:
Data are affected by intermittent spikes that become more frequent starting in March 2006. 
Spikes affect data mostly around 9 AM and 18:00 PM. The origin of the spikes is probably 
RF interference.
Measurements:nimmwrlosM1.b1:
  • Averaged total liquid water along LOS path(liq)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • MWR column precipitable water vapor(vap)
  • 31.4 GHz sky signal(sky31)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • 23.8 GHz sky signal(sky23)

nimmwrM1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

nimmwrtipM1.a1:
  • 31.4 GHz sky signal(tipsky31)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • 23.8 GHz sky signal(tipsky23)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)


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DQRID : D060530.1
Start DateStart TimeEnd DateEnd Time
11/26/2005153001/07/20072359
Subject:
NIM/ECOR/M1 - Data Suspect for NW and East Wind Directions
DataStreams:nim30ecorM1.b1
Description:
Data for these wind directions must be closely evaluated to determine if it is correct or 
incorrect.  Problem will remain for the entire extend of the NIM deployment.
Measurements:nim30ecorM1.b1:
  • rotated covariance uw(cvar_rot_uw)
  • vw covariance(cvar_vw)
  • rotated covariance wc(cvar_rot_wc)
  • mean value of out of range values and spikes of t -9999 if no spikes(mean_spk_t)
  • CO2 flux(fc)
  • Virtual temperature (T)(mean_t)
  • h(h)
  • latent heat flux(lv_e)
  • rotated covariance vw(cvar_rot_vw)
  • rotated mean w(mean_rot_w)
  • Water vapor density (q)(mean_q)
  • covariance wq(cvar_wq)
  • rotated covariance wt(cvar_rot_wt)
  • rotated covariance wq(cvar_rot_wq)
  • mean value of out of range values and spikes of q -9999 if no spikes(mean_spk_q)
  • momentum flux (dynamic)(k)
  • mean co2 concentration (c)(mean_c)
  • uw covariance(cvar_uw)
  • covariance wc(cvar_wc)
  • mean value of \spike\ w samples(mean_spk_w)
  • wT covariance(cvar_wt)
  • Vertical wind velocity (w)(mean_w)
  • Friction velocity(ustar)
  • mean value of out of range values and spikes of c -9999 if no spikes(mean_spk_c)


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DQRID : D060718.1
Start DateStart TimeEnd DateEnd Time
03/01/2006000001/08/20070000
Subject:
NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating.
DataStreams:nimmwrlosM1.b1, nimmwrtipM1.a1
Description:
The radiometer was intermittently thermally unstable resulting in poor calibrations for 
four brief time periods.  These data have been reprocessed to apply corrected calibrations. 
 The affected time periods were:

20060302-20060303
20060423-20060425
20060512-20060515
20060531-20060603
Measurements:nimmwrlosM1.b1:
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mixer kinetic (physical) temperature(tkxc)
  • MWR column precipitable water vapor(vap)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • 23.8 GHz Blackbody signal(bb23)
  • (tknd)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 31.4 GHz blackbody(bb31)

nimmwrtipM1.a1:
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 31.4 GHz blackbody(bb31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 31.4 GHz sky signal(tipsky31)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 23.8 GHz Blackbody signal(bb23)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 23.8 GHz sky signal(tipsky23)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Blackbody kinetic temperature(tkbb)
  • (tknd)


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DQRID : D070215.5
Start DateStart TimeEnd DateEnd Time
11/26/2005153001/07/20072330
Subject:
NIM/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration By Aircraft
DataStreams:nim30ecorM1.b1
Description:
Aircraft landings, departures, and running aircraft on the airport pad
were found to produce large spikes in the half hourly CO2 flux and small spikes in CO2 
concentration on many days during the entire deployment of the AMF at NIM.  This influence 
was found on 40% of the days in March and April 2006 and sometimes for multiple periods in 
a day; this was typical of  the year of data.  The spikes range from only several 
micromoles s-1 m-2 to one hundred or more for flux (a typical spike was in the twenties) and 
near zero to 1.0 mmoles m-3 for CO2 concentration (typically around 0.15).

The aircraft influence was caused by persistent easterly winds; the airport
terminal pad and the nearest part of the runway were almost directly to the
east of the ECOR location.

Occasionally an influence on water vapor density was detected, but this was fairly rare 
and usually of very small magnitude.
Measurements:nim30ecorM1.b1:
  • rotated covariance vc(cvar_rot_vc)
  • covariance wc(cvar_wc)
  • rotated covariance wc(cvar_rot_wc)
  • covariance of tc(cvar_tc)
  • CO2 flux(fc)
  • rotated covariance uc(cvar_rot_uc)
  • variance of c(var_c)
  • covariance vc(cvar_vc)
  • covariance uc(cvar_uc)
  • mean co2 concentration (c)(mean_c)


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