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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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.
Early delivery 4D-VAR at 2021-01-10 12:00
| amsua | ||
| NOAA-18 AMSUA RADIANCES CHANNEL 9 : out of range
33 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.5301, expected range: -0.7018 -0.6717 |
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| All AQUA AMSUA ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 3248.81 6038.90 |
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| iasi | ||
| METOP-A IASI RADIANCES CHANNEL 185 : out of range
28 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.3462, expected range: -0.3151 -0.2868 |
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| METOP-A IASI RADIANCES CHANNEL 187 : out of range
16 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.3986, expected range: -0.3566 -0.3160 |
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| METOP-A IASI RADIANCES CHANNEL 201 : out of range
31 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0413, expected range: 0.0746 0.0969 |
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| METOP-A IASI RADIANCES CHANNEL 207 : out of range
30 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.3142, expected range: -0.2803 -0.2500 |
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| METOP-A IASI RADIANCES CHANNEL 214 : out of range
32 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.1627, expected range: -0.1293 -0.1084 |
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| METOP-A IASI RADIANCES CHANNEL 222 : out of range
35 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0358, expected range: 0.0557 0.0672 |
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| METOP-B IASI RADIANCES CHANNEL 185 : out of range
21 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.2769, expected range: -0.2465 -0.2150 |
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| METOP-B IASI RADIANCES CHANNEL 201 : out of range
24 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1231, expected range: 0.1486 0.1739 |
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| METOP-B IASI RADIANCES CHANNEL 207 : out of range
31 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.2534, expected range: -0.2181 -0.1896 |
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| METOP-B IASI RADIANCES CHANNEL 214 : out of range
31 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.1292, expected range: -0.1008 -0.0744 |
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| METOP-B IASI RADIANCES CHANNEL 222 : out of range
32 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0832, expected range: 0.0990 0.1128 |
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| METOP-B IASI RADIANCES CHANNEL 1513 : out of range
38 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1338, expected range: 0.0563 0.0574 |
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| METOP-B IASI RADIANCES CHANNEL 1521 : out of range
27 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0631, expected range: -0.0159 0.0284 |
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| METOP-B IASI RADIANCES CHANNEL 1658 : out of range
37 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.3859, expected range: 0.2364 0.3059 |
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| METOP-C IASI RADIANCES CHANNEL 1509 : out of range
36 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0350, expected range: -0.1268 -0.0611 |
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| METOP-C IASI RADIANCES CHANNEL 1513 : out of range
34 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1729, expected range: 0.1108 0.1303 |
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| METOP-C IASI RADIANCES CHANNEL 1639 : out of range
38 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1103, expected range: -0.0178 0.0022 |
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| METOP-C IASI RADIANCES CHANNEL 1658 : out of range
24 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.4022, expected range: 0.2698 0.3329 |
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| airs | ||
| All AQUA AIRS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1283.39 11953.30 |
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| atms | ||
| NPP ATMS RADIANCES CHANNEL 10 : out of range
34 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.0887, expected range: -0.1967 -0.1786 |
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| NOAA20 ATMS RADIANCES CHANNEL 9 : out of range
35 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.5146, expected range: -0.6045 -0.6009 |
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| ssmis | ||
| All DMSP-17 SSMIS ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 1911.34 11084.20 |
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| All DMSP-18 SSMIS ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 3560.77 9048.60 |
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| gpsro | ||
| All COSMIC-6 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1204.48 |
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| All COSMIC2-E6 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 331.16 1529.65 |
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| COSMIC2-E5 GPSRO RISING HEIGHT 36-38 KM : out of range
Slight: stdev_norm_fgdepar=1.1352, expected range: 0.6061 1.0198 |
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| COSMIC2-E5 GPSRO RISING HEIGHT 38-40 KM : out of range
Slight: stdev_norm_fgdepar=1.1319, expected range: 0.4596 0.9539 |
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| Atmospheric Motion Vector | ||
| All NOAA-18 AVHRR IR ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 91.55 573.03 |
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| resat | ||
| METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
Slight: avg_fgdepar=-2.2364, expected range: -1.3892 1.1406 |
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| amdar | ||
| WIGOS AMDAR WIND VECTOR DIFF (M/S) (2 pressure layers affected) : missing
1 times in the last 10 days for at least one item Severe: obs_number=0.0000, expected range: 0.0000 1224.3297 |
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