Data Quality Reports for Session: 152385 User: sudipm Completed: 08/19/2013


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050614.1SGP/VCEIL/C1 - poor signalsgpvceil25kC1.b1
D100215.1SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fieldssgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1
D130221.3SGP/ARMBE/C1 - incorrect qc_flag values, VAP errorsgparmbeatmC1.c1, sgparmbecldradC1.c1


DQRID : D050614.1
Start DateStart TimeEnd DateEnd Time
05/05/2005184204/19/20061713
Subject:
SGP/VCEIL/C1 - poor signal
DataStreams:sgpvceil25kC1.b1
Description:
When parameters were changed (set noise_h2_compensation to "ON" and units to "METERS") to 
correct a low amplitude problem, the backscatter plots began displaying horizontal 
stripes indicating detector "ringing". However, the cloud base heights are not affected. The 
problem was corrected when the instrument was replaced.
Measurements:sgpvceil25kC1.b1:
  • detection_status
  • Normalized corrected relative backscatter(backscatter)


Back To Table of Contents

DQRID : D100215.1
Start DateStart TimeEnd DateEnd Time
04/01/2001000010/31/20092359
Subject:
SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields
DataStreams:sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1
Description:
Attribute serial_number: In most cases, this field is not representative of the actual 
serial number of the instrument because the value did not change when an instrument changed 
locations or was replaced with a spare.

Variable sum_backscatter: An out-of-range condition for the "sum of detected and 
normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 
0.0999 /srad.

This DQR also applies to a1 level data collected prior to b1 level.
Measurements:sgpvceil25kC1.b1:
  • sum_backscatter

sgpvceil25kB4.b1:
  • sum_backscatter

sgpvceil25kB6.b1:
  • sum_backscatter

sgpvceil25kB5.b1:
  • sum_backscatter


Back To Table of Contents

DQRID : D130221.3
Start DateStart TimeEnd DateEnd Time
01/01/1996000012/31/20112300
Subject:
SGP/ARMBE/C1 - incorrect qc_flag values, VAP error
DataStreams:sgparmbeatmC1.c1, sgparmbecldradC1.c1
Description:
This problem impacts the qc_cld_base_source and qc_cld_frac_source fields in the 
ARMBECLDRAD product, and is described below:

qc_cld_base_source:  The metadata for this field lists possible values of 0, -1, -2, -3, 
and -4.  However, this field contains values equal to -5, which are undefined.  This 
problem is most prevalent in 1996 and 2011, but also occurs in 1997, 2002, 2008, and 2010.  
There is no cld_base field in this VAP, so I'm not sure what this QC field is used for. 

qc_cld_frac_source:  The metadata for this field lists possible values of -1, 1, 2, and 3. 
 However, this field contains values equal to -5, which are undefined.  This problem is 
most prevalent in 1996 and 2011, but also occurs in 1997, 2002, 2008, and 2010.  During 
these periods the cld_frac field is equal to -9999, but a value of -1 in 
qc_cld_frac_source should coincide with these periods.
Measurements:sgparmbecldradC1.c1:
  • Cloud thickness, satellite-measured(cld_thick)
  • Fractional Sky Cover, based on SWF, hourly mean(skycover)
  • Surface Upwelling (10 meter) Longwave Hemispheric Irradiance, hourly mean(lwup)
  • base_time
  • time_bounds
  • TOA LW flux, upward positive(lw_net_TOA)
  • lon
  • Total Cloud Fraction based on MMCR/MPL, narrow field-of-view, hourly mean(tot_cld)
  • stdev_totswfluxdn
  • stdev_pwv
  • tot_cld_tsi
  • stdev_skycover
  • Liquid water path best-estimate value, hourly mean(lwp)
  • stdev_lwup
  • lat
  • TOA net SW flux, downward positive(sw_net_TOA)
  • TOA solar insolation(sw_dn_TOA)
  • time_frac
  • time_offset
  • Whole-sky Downwelling SW, based on SWF, hourly mean(totswfluxdn)
  • stdev_lwp
  • stdev_swup
  • stdev_swdir
  • stdev_lwdn
  • Middle level cloud, satellite-measured(cld_mid)
  • cld_frac_MPL
  • Clear-sky Downwelling SW, based on SWF, hourly mean(clrswfluxdn)
  • Pressure, associated geometric height, at altitude, NGM model output(height)
  • stdev_clrswfluxdn
  • time
  • High level cloud, satellite-measured(cld_high)
  • stdev_swdif
  • Low level cloud, satellite-measured(cld_low)
  • alt
  • Surface Downwelling Shortwave Diffuse Hemispheric Irradiance, hourly mean(swdif)
  • cld_frac_MMCR
  • Surface Downwelling Shortwave Hemispheric Irradiance, best estimate, hourly mean(swdn)
  • Surface Direct Shortwave Irradiance: direct normal component of SW * the cosine
    of solar zenith angle, hourly mean(swdir)
  • Cloud top, satellite-measured(cld_top)
  • Water vapor, precipitable, column-integrated on isobaric grid, from RUC model(pwv)
  • stdev_swdn
  • Cloud Fraction based on MMCR and MPL, hourly mean(cld_frac)
  • Surface Upwelling Shortwave Hemispheric Irradiance, hourly mean(swup)
  • cld_tot
  • Surface Downwelling Longwave Hemispheric Irradiance, hourly mean(lwdn)

sgparmbeatmC1.c1:
  • Relative Humidity, at 2m(rh_sfc)
  • wspd_z
  • Environmental Temperature (p grid)(T_nwp_p)
  • time_offset
  • p_bounds
  • Wind Speed, from sounding in p coordinate(wspd_p)
  • z2
  • Surface Latent Heat Flux, upward positive(LH)
  • Pressure, atmospheric, at altitude, RUC model output(p)
  • Relative Humidity (p grid)(rh_nwp_p)
  • lat
  • Temperature, at 2m(T_sfc)
  • rh_z
  • Relative humidity scaled, by total column amount from MWR, from sounding in p
    coordinate(rh_p)
  • Precipitation Rate(prec_sfc)
  • time_frac
  • z_bounds
  • V Windspeed, y component, at 10m(v_sfc)
  • z
  • lon
  • z10
  • Dry Bulb Temperature, from sounding in p coordinate(T_p)
  • Dewpoint Temperature, from sounding in p coordinate(Td_p)
  • alt
  • Barometric Pressure(p_sfc)
  • T_z
  • time
  • u-Component of Wind (p grid)(u_nwp_p)
  • base_time
  • Vertical Velocity (p grid)(omega_nwp_p)
  • Wind Direction, at 10m(wdir_sfc)
  • Surface Sensible Heat Flux, upward positive(SH)
  • U Windspeed, x component, at 10m(u_sfc)
  • v-Component of Wind (p grid)(v_nwp_p)
  • Td_z
  • time_frac_z
  • time_bounds
  • Eastward Wind Component, from sounding in p coordinate(u_p)
  • SH_beecor
  • Northward Wind Component, from sounding in p coordinate(v_p)
  • wdir_z
  • u_z
  • v_z
  • Wind Speed, at 10m(wspd_sfc)
  • LH_beecor
  • time_frac_p
  • Wind Direction, from sounding in p coordinate(wdir_p)


Back To Table of Contents



END OF DATA