Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Ensemble Data Assimilation at 2022-01-13 12:00

amsua
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2940, expected range: -0.2526 -0.2376
cris
NOAA20 CRIS RADIANCES CHANNEL 1174 : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0528, expected range: -0.0197 0.0113
NOAA20 CRIS RADIANCES CHANNEL 1185 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1306, expected range: 0.1572 0.1903
NOAA20 CRIS RADIANCES CHANNEL 1208 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0408, expected range: -0.0110 0.0230
NOAA20 CRIS RADIANCES CHANNEL 1221 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1743, expected range: 0.2039 0.2319
NOAA20 CRIS RADIANCES CHANNEL 1234 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0199, expected range: 0.0108 0.0391
NOAA20 CRIS RADIANCES CHANNEL 1237 : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0840, expected range: 0.1219 0.1488
NOAA20 CRIS RADIANCES CHANNEL 1238 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.0327, expected range: 0.0607 0.0924
NOAA20 CRIS RADIANCES CHANNEL 1267 : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.1811, expected range: 0.2075 0.2324
airs
AQUA AIRS RADIANCES CHANNEL 305 : out of range
4 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.8781, expected range: 0.3239 0.4306
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 3 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2434, expected range: 1.6138 1.7349
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 7 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.6859, expected range: -1.2795 -1.1955
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.6448, expected range: 1.8025 2.3613
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.2236, expected range: -0.3735 0.2557
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.0084, expected range: 1.5909 2.3363
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=1.4501, expected range: 4.0758 4.9579
FY-3D MWHS2 ALLSKY RADIANCES (6 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: avg_norm_fgdepar=-0.3506, expected range: -0.0743 0.0643
FY-3D MWHS2 ALLSKY RADIANCES (5 channels affected) : out of range
Severe: stdev_norm_fgdepar=1.0800, expected range: 0.8017 0.8356
Considerable: obs_number=13727.0000, expected range: 14518.7177 16960.8112
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 8 : out of range
Severe: avg_biascorr=-2.3572, expected range: -2.0408 -1.9923
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.0082, expected range: 0.0335 0.0839
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2370, expected range: -0.2849 -0.2579
NPP ATMS RADIANCES CHANNEL 11 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1377, expected range: -0.2375 -0.2025
ssmis
DMSP-17 SSMIS RADIANCES (9 channels affected) : out of range
Considerable: obs_number=13101.0000, expected range: 16837.3596 19073.5816
Atmospheric Motion Vector
METEOSAT-8 AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_press=15.0821, expected range: 24.6444 30.5290
AQUA MODIS CLEAR WV WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
Severe: stdev_press=35.5243, expected range: 47.7374 54.3537
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
Severe: stdev_press=73.2972, expected range: 59.0844 62.6541
METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=962.0000, expected range: 258.1967 722.9852
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA : out of range
Considerable: stdev_fgdepar=1.2930, expected range: 0.9856 1.1418
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Considerable: obs_number=2922.0000, expected range: 887.0909 1688.1091
mwri
FY-3D MWRI RADIANCES CHANNEL 9 : out of range
Considerable: obs_number=2771.0000, expected range: 2941.9092 3587.6123