DQRID : D111004.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/31/2011133008/19/20111900Incorrect
more
Subject:
SGP/RL/C1 - Frequent intermittent drop-outs in the WFOV photon counting signals
DataStreams:sgprlprofmerge1turnC1.c0, sgp10rlprofext1ferrC1.c1, sgp10rlprofasr1ferrC1.c1,
sgp10rlprofmr1turnC1.c1, sgprlC1.a0
Description:
Beginning suddenly, near 1330 UTC on 31 May 2011, the liquid water and all three WFOV 
channels began showing intermittent and frequent “drop-outs” in the photon counting signals. 
These drop-outs were periods when the signal would momentarily fade and then come back. 

This problem, which was traced to a malfunction of the Licel data recorders, occurred at 
irregular intervals and with such frequency as to render the data from the affected 
channels useless. This problem persisted until repairs were made to the Licel transient 
recorders on 19 August 2011. 

Although only the WFOV channels (and liquid water channel) were affected, the aerosol and 
water vapor mixing ratio VAPs are computed by combining NFOV and WFOV channels. Thus, all 
of these higher level data products were adversely impacted by the drop-out problem.

The NFOV data in the sgprlC1.a0 and sgprlprofmerge1turnC1.c0 datastreams were unaffected 
by the "drop-out" problem. These signals could be used to compute aerosol optical 
properties and water vapor mixing ratio.
Suggestions: 
Measurements:sgp10rlprofext1ferrC1.c1:
  • aod_1_max_ht
  • extinction_from_backscatter_error
  • aod_married1_error
  • aod_bscat_profile
  • extinction_from_backscatter
  • aod_married1_max_ht
  • extinction_married1
  • aod_1_error
  • extinction_low_error
  • aod_1_profile
  • aod_bscat_error
  • backscatter
  • extinction_low_resolution
  • smoothed_backscatter
  • Sa_1
  • extinction_1
  • aod_bscat_max_ht
  • extinction_married1_mask
  • Sa_2
  • aod_married1_profile
  • aod_1
  • extinction_low
  • extinction_married1_error
  • aod_bscat
  • backscatter_error
  • smoothed_backscatter_error
  • extinction_1_error
  • aod_married1
more
sgprlprofmerge1turnC1.c0:
  • electronic_background_elastic_analog_low
  • liquid_counts_high_glue_coef_slope
  • solar_offset_nudge_nl
  • liquid_counts_high_glue_coef_offset
  • parameters_nitrogen_low
  • solar_background_nitrogen_low
  • parameters_water_low
  • elastic_counts_low_glue_coef_offset
  • nitrogen_counts_low_glue_coef_offset
  • solar_offset_nudge_el
  • water_counts_low_glue_coef_slope
  • elastic_counts_low_glue_coef_slope
  • solar_offset_nudge_wl
  • elastic_counts_low
  • water_counts_low
  • nitrogen_counts_low_glue_coef_slope
  • electronic_background_water_analog_low
  • water_counts_low_glue_coef_offset
  • parameters_elastic_low
  • nitrogen_counts_low
  • solar_background_water_low
  • electronic_background_nitrogen_analog_low
  • liquid_counts_high
  • solar_offset_nudge_lw
  • solar_background_elastic_low
more
sgp10rlprofasr1ferrC1.c1:
  • bscat_err
  • backscatter
  • asr_1_error
  • cloud_mask
  • cal_asr_1_error
  • cal_asr_1
  • scale_add_lo
  • cal_asr_error_low
  • corr_bscat
  • asr_low
  • asr_1
  • cal_factor_lo
  • asr_error_low
  • diff_trans_aerosol_corr
  • cal_asr_low
more
sgp10rlprofmr1turnC1.c1:
  • calib_high_low
  • pwv_rl_err
  • mixing_ratio_3
  • mixing_ratio_2
  • mixing_ratio_2_error
  • mixing_ratio_1
  • mixing_ratio_low
  • mixing_ratio_3_error
  • mixing_ratio_1_error
  • wv_rl_max_height
  • pwv_rl_fraction
  • relative_humidity_over_ice
  • relative_humidity
  • mixing_ratio_error_low
  • pwv_rl
more
sgprlC1.a0:
  • water_counts_low
  • liquid_analog_high
  • nitrogen_counts_low
  • liquid_counts_high
  • elastic_analog_low
  • nitrogen_analog_low
  • water_analog_low
  • elastic_counts_low
more

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