Cloud and precipitation checks for ATMS
- Checks for all observations:
- Sanity check on observaton values
- Sanity check on retrieved CLW values
- Checks for observation over ocean include:
- Scattering check based on 54.4GHz channel
- Scattering check based on 53.6GHz channel
- Sensitivity to surface emissivity
- Checks observation over non-ocean surface include:
- Scattering check based on 54.4GHz channel
- Thick cloud check based on 52.8GHz channel
- Sensitivity to surface emissivity
- Output of this function:
0 = channel is not affected by thick clouds and precipitation
1 = channel is affected by thick clouds and precipitation
ATMS Example (atms_qc_filters.yaml):
- filter: Bounds Check
filter variables:
- name: brightness_temperature
channels: *all_channels
test variables:
- name: HydrometeorCheckATMS@ObsFunction
channels: *all_channels
options:
channels: *all_channels
obserr_clearsky: [ 4.500, 4.500, 4.500, 2.500, 0.550,
0.300, 0.300, 0.400, 0.400, 0.400,
0.450, 0.450, 0.550, 0.800, 3.000,
4.000, 4.000, 3.500, 3.000, 3.000,
3.000, 3.000]
clwret_function:
name: CLWRetMW@ObsFunction
options:
clwret_ch238: 1
clwret_ch314: 2
clwret_types: [ObsValue]
obserr_function:
name: ObsErrorModelRamp@ObsFunction
channels: *all_channels
options:
channels: *all_channels
xvar:
name: CLWRetSymmetricMW@ObsFunction
options:
clwret_ch238: 1
clwret_ch314: 2
clwret_types: [ObsValue, HofX]
x0: [ 0.030, 0.030, 0.030, 0.020, 0.030,
0.080, 0.150, 0.000, 0.000, 0.000,
0.000, 0.000, 0.000, 0.000, 0.000,
0.020, 0.030, 0.030, 0.030, 0.030,
0.050, 0.100]
x1: [ 0.350, 0.380, 0.400, 0.450, 0.500,
1.000, 1.000, 0.000, 0.000, 0.000,
0.000, 0.000, 0.000, 0.000, 0.000,
0.350, 0.500, 0.500, 0.500, 0.500,
0.500, 0.500]
err0: [ 4.500, 4.500, 4.500, 2.500, 0.550,
0.300, 0.300, 0.400, 0.400, 0.400,
0.450, 0.450, 0.550, 0.800, 3.000,
4.000, 4.000, 3.500, 3.000, 3.000,
3.000, 3.000]
err1: [20.000, 25.000, 12.000, 7.000, 3.500,
3.000, 0.800, 0.400, 0.400, 0.400,
0.450, 0.450, 0.550, 0.800, 3.000,
19.000, 30.000, 25.000, 16.500, 12.000,
9.000, 6.500]
maxvalue: 0.0
action:
name: reject