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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-12 00:00
| iasi | ||
| METOP-B IASI RADIANCES CHANNEL 167 : out of range
Considerable: obs_number=2531.0000, expected range: 2036.0904 2429.4096 |
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| airs | ||
| AQUA AIRS RADIANCES CHANNEL 305 : out of range
1 times in the last 10 days for at least one item Severe: stdev_fgdepar=1.0011, expected range: 0.3587 0.4058 |
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| mhs | ||
| METOP-B MHS ALLSKY RADIANCES CHANNEL 1 : out of range
9 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=0.1396, expected range: 0.1071 0.1245 |
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| METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
18 times in the last 10 days for at least one item Severely_persistent: obs_number=5525.0000, expected range: 6595.8093 7086.7072 |
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| METOP-B MHS ALLSKY RADIANCES CHANNEL 4 : out of range
2 times in the last 10 days for at least one item Severe: avg_biascorr=0.0719, expected range: -0.1819 -0.0428 |
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| mwhs2 | ||
| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item Severely_persistent: obs_number=6404.0000, expected range: 7907.5258 8065.1006 |
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| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 15 : out of range
19 times in the last 10 days for at least one item Severely_persistent: obs_number=5431.0000, expected range: 6688.3813 6816.4690 |
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| FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
1 times in the last 10 days for at least one item Severe: avg_biascorr=-0.0038, expected range: 0.0335 0.0811 |
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| FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
1 times in the last 10 days for at least one item Severe: avg_biascorr=-0.0309, expected range: 1.5909 2.4799 |
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| FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
1 times in the last 10 days for at least one item Severe: avg_biascorr=1.4457, expected range: 4.0758 4.9579 |
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| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
2 times in the last 10 days for at least one item Severe: avg_norm_fgdepar=-0.1637, expected range: -0.0391 0.0332 |
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| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 3 : out of range
4 times in the last 10 days for at least one item Severe: avg_norm_fgdepar=2.2599, expected range: -0.0476 0.0352 |
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| atms | ||
| NPP ATMS RADIANCES CHANNEL 11 : out of range
15 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.1388, expected range: -0.2344 -0.2025 |
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| NPP ATMS RADIANCES CHANNEL 13 : out of range
2 times in the last 10 days for at least one item Severe: avg_biascorr=-0.3405, expected range: -0.2951 -0.2854 |
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| NPP ATMS RADIANCES (7 channels affected) : out of range
2 times in the last 10 days for at least one item Severe: obs_number=1725.0000, expected range: 2994.0703 3478.3047 |
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| NOAA20 ATMS RADIANCES (7 channels affected) : out of range
1 times in the last 10 days for at least one item Severe: obs_number=2161.0000, expected range: 3306.1425 3493.4825 |
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| gpsro | ||
| COSMIC2-E1 GPSRO RISING HEIGHT 10-12 KM : out of range
Slight: avg_norm_fgdepar=-0.1465, expected range: -0.1112 0.0279 |
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| Atmospheric Motion Vector | ||
| NPP VIIRS AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
3 times in the last 10 days for at least one item Severe: avg_press=439.2607, expected range: 367.5099 396.0398 |
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| METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=845.0000, expected range: 172.9908 574.8941 |
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| NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
4 times in the last 10 days for at least one item Considerable: avg_press=430.5972, expected range: 356.0645 393.9966 |
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