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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-11-17 00:00
| amsua | ||
| NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 5 : out of range
Considerable: stdev_norm_fgdepar=1.4726, expected range: 0.9778 1.2776 |
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| AMSUA Pacific RARS | ||
| All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 3327.31 |
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| All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 2300.14 |
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| cris | ||
| NPP CRIS RADIANCES CHANNEL 48 : out of range
18 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2609, expected range: 0.2138 0.2367 |
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| NPP CRIS RADIANCES CHANNEL 57 : out of range
20 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1661, expected range: 0.1112 0.1348 |
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| NPP CRIS RADIANCES CHANNEL 60 : out of range
31 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1178, expected range: 0.0660 0.0825 |
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| NPP CRIS RADIANCES CHANNEL 61 : out of range
24 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1214, expected range: 0.0690 0.0882 |
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| NPP CRIS RADIANCES CHANNEL 62 : out of range
15 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1002, expected range: 0.0468 0.0748 |
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| NPP CRIS RADIANCES CHANNEL 65 : out of range
30 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0814, expected range: 0.0465 0.0575 |
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| NPP CRIS RADIANCES CHANNEL 66 : out of range
39 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0759, expected range: 0.0374 0.0438 |
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| NPP CRIS RADIANCES CHANNEL 67 : out of range
18 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0016, expected range: -0.0482 -0.0221 |
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| NPP CRIS RADIANCES CHANNEL 68 : out of range
34 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0615, expected range: 0.0187 0.0308 |
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| NPP CRIS RADIANCES CHANNEL 20 : out of range
29 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2060, expected range: 0.2320 0.2384 |
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| NPP CRIS RADIANCES CHANNEL 23 : out of range
29 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.1855, expected range: 0.2025 0.2202 |
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| NPP CRIS RADIANCES CHANNEL 26 : out of range
46 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.1718, expected range: 0.1935 0.2096 Severely_persistent: avg_biascorr=0.8119, expected range: 0.5655 0.6621 |
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| NPP CRIS RADIANCES CHANNEL 72 : out of range
10 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0044, expected range: -0.1627 -0.1591 |
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| NPP CRIS RADIANCES CHANNEL 75 : out of range
23 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.0519, expected range: -0.2057 -0.1320 |
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| NOAA20 CRIS RADIANCES CHANNEL 113 : out of range
36 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.1163, expected range: 0.0850 0.1003 |
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| NOAA20 CRIS RADIANCES CHANNEL 1221 : out of range
28 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1104, expected range: 0.1536 0.1976 |
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| NOAA20 CRIS RADIANCES CHANNEL 1267 : out of range
30 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0975, expected range: 0.1425 0.1913 |
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| NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
24 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.1600, expected range: 0.1867 0.2020 |
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| NOAA20 CRIS RADIANCES CHANNEL 23 : out of range
38 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.1359, expected range: 0.1821 0.1855 |
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| NOAA20 CRIS RADIANCES (21 channels affected) : out of range
2 times in the last 10 days for at least one item Severe: stdev_fgdepar=0.1936, expected range: 0.1371 0.1464 |
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| Atmospheric Motion Vector | ||
| All HIMAWARI-8 AMV CLOUDY WV1 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 274.60 1208.90 |
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