D Q R Report

DQRID : D040205.1

Start Date	Start Time	End Date	End Time	Data Quality Metric
02/02/2004	1200	02/02/2004	2000	Suspect

Subject:	SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers
DataStreams:	sgpsirsE8.00, sgpsirsE1.b1, sgpsirs20sE8.a0, sgpsirs20sE3.a0, sgpsirsE5.b1, sgpsirsE3.b1, sgpsirsE3.00, sgpsirsE1.00, sgpsirsE2.00, sgpsirsE2.b1, sgpsirs20sE2.a0, sgpsirs20sE1.a0, sgpsirsE5.00, sgpsirsE8.b1, sgpsirs20sE5.a0
Description:	A large discrepancy between the measured values of downwelling hemispheric shortwave radiation and the derived values occurred on 2/02 at the listed sites. The difference is on the order of 200 Wm^(-2) at E2 and to a lesser extent at the other affected stations. This problem most likely resulted from a previous day or night snow/ice accumulation on the Direct(NIP), Downwelling Sortwave(PSP) and/or Downwelling Diffuse(8-48) instruments. During the morning hours of 02/02, Approx 1300-2000GMT, snow/ice was covering one or more of these three instruments resulting in faulty readings and incorrect derived downwelling shortwave values as well. Instrument readings indicate the problem resolved itself later in the day through normal meltoff.
Suggestions:	Disregard this mornings data
Measurements:	sgpsirsE8.b1: down_short_diffuse_hemisp_std down_short_diffuse_hemisp down_short_hemisp_std short_direct_normal short_direct_normal_std down_short_diffuse_hemisp_max down_short_diffuse_hemisp_min down_short_hemisp down_short_hemisp_max short_direct_normal_min down_short_hemisp_min short_direct_normal_max more sgpsirsE1.b1: down_short_diffuse_hemisp_std short_direct_normal down_short_hemisp short_direct_normal_max down_short_hemisp_min down_short_hemisp_max short_direct_normal_min down_short_diffuse_hemisp_max down_short_diffuse_hemisp down_short_diffuse_hemisp_min short_direct_normal_std down_short_hemisp_std more sgpsirsE2.b1: down_short_hemisp_std down_short_diffuse_hemisp_std short_direct_normal_max short_direct_normal_min down_short_hemisp_max down_short_hemisp down_short_diffuse_hemisp_max down_short_diffuse_hemisp_min down_short_hemisp_min down_short_diffuse_hemisp short_direct_normal_std short_direct_normal more sgpsirsE5.b1: down_short_diffuse_hemisp_std down_short_hemisp_min short_direct_normal_max down_short_hemisp_max short_direct_normal short_direct_normal_min down_short_hemisp down_short_diffuse_hemisp down_short_diffuse_hemisp_max short_direct_normal_std down_short_hemisp_std down_short_diffuse_hemisp_min more sgpsirsE3.b1: down_short_diffuse_hemisp_std down_short_hemisp_max down_short_hemisp_min short_direct_normal_std down_short_diffuse_hemisp down_short_diffuse_hemisp_max down_short_hemisp_std short_direct_normal down_short_diffuse_hemisp_min down_short_hemisp short_direct_normal_min short_direct_normal_max more sgpsirs20sE1.a0: inst_global inst_direct_normal inst_diffuse more sgpsirs20sE2.a0: inst_direct_normal inst_diffuse inst_global more sgpsirsE1.00: Raw data stream - documentation not supported more sgpsirsE2.00: Raw data stream - documentation not supported more sgpsirs20sE8.a0: inst_diffuse inst_direct_normal inst_global more sgpsirs20sE3.a0: inst_direct_normal inst_global inst_diffuse more sgpsirsE8.00: Raw data stream - documentation not supported more sgpsirsE3.00: Raw data stream - documentation not supported more sgpsirs20sE5.a0: inst_diffuse inst_direct_normal inst_global more sgpsirsE5.00: Raw data stream - documentation not supported more

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