Data Quality Reports for Session: 151514 User: eluke Completed: 07/14/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1
D120717.1SGP/MWR3C/C1 - Spikes in wind speed and directionsgpmwr3cC1.b1
D120831.1SGP/MWR3C/C1 - Possible bias in 89 GHz brightness temperaturessgpmwr3cC1.b1
D130423.2SGP/KAZR/C1 - Reprocess: Incorrect metadata radar parameterssgpkazrblC1.b1, sgpkazrciC1.b1, sgpkazrgeC1.b1, sgpkazrspeccmaskblcopolC1.a0,
sgpkazrspeccmaskblxpolC1.a0, sgpkazrspeccmaskcicopolC1.a0, sgpkazrspeccmaskcixpolC1.a0,
sgpkazrspeccmaskgecopolC1.a0


DQRID : D060928.3
Start DateStart TimeEnd DateEnd Time
09/28/2006172812/31/99992359
Subject:
SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry
DataStreams:sgpsondewnpnC1.b1
Description:
The output precision of the following variables was increased 20060928

alt  changed from 1m to 0.1m
dp   changed from 0.1degC to 0.01degC
pres changed from 0.1 hPa to 0.01 hPa
RH   changed from 1%RH to 0.01%RH
tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase in accuracy.  
Users are cautioned to continue to use their best scientific judgement when using these or 
any other data.
Measurements:sgpsondewnpnC1.b1:
  • alt
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)

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DQRID : D120717.1
Start DateStart TimeEnd DateEnd Time
05/03/2012150907/09/20121925
Subject:
SGP/MWR3C/C1 - Spikes in wind speed and direction
DataStreams:sgpmwr3cC1.b1
Description:
The surface wind speed and wind direction wre occasionally spiking to large values during 
daylight hours. The spikes did not match well with co-located MET values. On 7/9 the wind 
sensor was replaced with a spare.
Measurements:sgpmwr3cC1.b1:
  • wind_direction_min
  • wind_speed_min
  • wind_speed_avg
  • wind_direction_max
  • wind_direction_avg
  • wind_speed_max

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DQRID : D120831.1
Start DateStart TimeEnd DateEnd Time
10/01/2011000007/22/20120000
Subject:
SGP/MWR3C/C1 - Possible bias in 89 GHz brightness temperatures
DataStreams:sgpmwr3cC1.b1
Description:
The 89 GHz brightness temperatures appear slightly warm when compared to model 
computations. The bias appear to be about 1.5 K. This could affect the liquid water retrievals that 
may display a slight positive bias.
Measurements:sgpmwr3cC1.b1:
  • 89.0 GHz sky brightness temperature(tbsky89)
  • Liquid water path best-estimate value, hourly mean(lwp)
  • Water vapor, precipitable, column-integrated on isobaric grid, from RUC model(pwv)

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DQRID : D130423.2
Start DateStart TimeEnd DateEnd Time
01/06/2011101704/13/20131651
Subject:
SGP/KAZR/C1 - Reprocess: Incorrect metadata radar parameters
DataStreams:sgpkazrblC1.b1, sgpkazrciC1.b1, sgpkazrgeC1.b1, sgpkazrspeccmaskblcopolC1.a0,
sgpkazrspeccmaskblxpolC1.a0, sgpkazrspeccmaskcicopolC1.a0, sgpkazrspeccmaskcixpolC1.a0,
sgpkazrspeccmaskgecopolC1.a0
Description:
Metadata in these files are incorrect.  Antenna gain, beamwidth, system losses, etc. were 
not set in the correct file when the KAZR was originally installed.  

These values are not used to calculate the radar constant so reflectivity values are still 
correct.  

The correct values for the SGP KAZR are:

tx_path_loss_db=0.91
  dielectric_factor=0.94
  h_gain_db=57.48
  h_beamwidth_theta_deg=.19
  h_beamwidth_phi_deg=.19
  v_gain_db=57.48
  v_beamwidth_theta_deg=.19
  v_beamwidth_phi_deg=.19
  probert_jones_correction_db=0.0
  radome_loss_twoway_db=2
  rx_path_loss_db_copol=2.20
  rx_path_loss_db_xpol=1.77
  finite_bandwidth_loss_db_ch1=1.5
  finite_bandwidth_loss_db_ch2=1.5
Measurements:sgpkazrspeccmaskblcopolC1.a0:
  • base_time
sgpkazrblC1.b1:
  • base_time
sgpkazrspeccmaskcicopolC1.a0:
  • base_time
sgpkazrspeccmaskgecopolC1.a0:
  • base_time
sgpkazrgeC1.b1:
  • base_time
sgpkazrciC1.b1:
  • base_time
sgpkazrspeccmaskcixpolC1.a0:
  • base_time
sgpkazrspeccmaskblxpolC1.a0:
  • base_time

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