| Description: | Microbase uses the CloudBasePrecipitation field from the twparscl1clothC3.c1 product to
determine the occurrence of precipitation. The twparscl1clothC3.c1 CloudBasePrecipitation
field is partially derived from the precip_mean field in the twpsmet60sC3.b1 product.
DQR D060426.8 indicates there is a grounding issue with the optical rain gauge and the
precip_mean values from twpsmet60sC1.b1 are suspect over this period.
As a result, the values in the Microbase aqc_precip field could be suspect. Values of
"14" to indicate precipitation in the Microbase aqc_liquid_water_content and
aqc_liq_effective_radius fields could be suspect as well. Because we aren't certain when precipitation
occurred, values of liquid_water_content and liq_effective_radius should be carefully
evaluated during this period. |
| Suggestions: | Because manual quality control is performed before determining values for the
CloudBasePrecipitation in twparscl1clothC3.c1, you may be able to reliably use some of the
aqc_liquid_water_content values in Microbase to determine when precipitation occurred.
However, you may want to compare the indicated times of precipitation to values of the
precip_mean field from the twpsmet60sC3.b1 product to determine if precipitation occurred.
Use the twpsmet60sC3.b1 data with caution as there was a grounding issue with the optical rain gauge over this period. You may need to subtract a background value of up to 0.10 mm/hr from the precip_mean values. Please see DQR D060426.8 for more details on this issue.
Because manual quality control is performed before determining values for the
Clou
dBasePrecipitation in twparscl1clothC3.c1, you may be able to reliably use some of the
aqc_liquid_water_content values in Microbase to determine when precipitation occurred.
However, you may want to compare the indicated times of precipitation to values of the precip_mean field from the twpsmet60sC3.b1 product to determine if precipitation occurred.
Use the twpsmet60sC3.b1 data with caution as there was a grounding issue with the optical rain gauge over this period. You may need to subtract a background value of up to 0.10 mm/hr from the precip_mean values. Please see DQR D060426.8 for more details on this issue. |