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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-06-25 12:00
| amsua | ||
| METOP-B AMSUA ALL SKY RADIANCES CHANNEL 8 : out of range
7 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.0934, expected range: -0.1180 -0.1043 |
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| iasi | ||
| METOP-B IASI RADIANCES CHANNEL 303 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2738, expected range: 0.2329 0.2522 |
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| METOP-B IASI RADIANCES CHANNEL 101 : out of range
5 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2419, expected range: 0.2674 0.3006 |
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| METOP-B IASI RADIANCES CHANNEL 163 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2716, expected range: 0.2999 0.3180 |
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| METOP-B IASI RADIANCES CHANNEL 170 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2207, expected range: 0.2404 0.2529 |
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| METOP-C IASI RADIANCES CHANNEL 3248 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.0418, expected range: 0.0677 0.0942 |
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| METOP-C IASI RADIANCES CHANNEL 101 : out of range
5 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1835, expected range: 0.2335 0.2534 |
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| METOP-C IASI RADIANCES CHANNEL 138 : out of range
5 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2744, expected range: 0.3048 0.3141 |
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| METOP-C IASI RADIANCES CHANNEL 144 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2112, expected range: 0.2448 0.2538 |
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| METOP-C IASI RADIANCES CHANNEL 151 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2225, expected range: 0.2421 0.2581 |
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| METOP-C IASI RADIANCES CHANNEL 183 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1863, expected range: 0.2120 0.2337 |
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| METOP-C IASI RADIANCES CHANNEL 189 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1690, expected range: 0.1936 0.2034 |
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| METOP-C IASI RADIANCES CHANNEL 195 : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1352, expected range: 0.1614 0.1826 |
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| METOP-B IASI RADIANCES CHANNEL 2907 : out of range
3 times in the last 10 days for at least one item Considerable: obs_number=531.0000, expected range: 85.1857 282.5578 |
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| METOP-B IASI RADIANCES CHANNEL 2958 : out of range
4 times in the last 10 days for at least one item Considerable: obs_number=382.0000, expected range: 71.0593 211.5076 |
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| METOP-B IASI RADIANCES CHANNEL 3029 : out of range
3 times in the last 10 days for at least one item Considerable: obs_number=716.0000, expected range: 108.5020 409.5902 |
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| METOP-B IASI RADIANCES CHANNEL 3049 : out of range
3 times in the last 10 days for at least one item Considerable: obs_number=676.0000, expected range: 102.1210 376.9984 |
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| METOP-C IASI RADIANCES CHANNEL 2907 : out of range
4 times in the last 10 days for at least one item Considerable: obs_number=487.0000, expected range: 85.0606 274.1253 |
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| METOP-C IASI RADIANCES CHANNEL 2958 : out of range
4 times in the last 10 days for at least one item Considerable: obs_number=344.0000, expected range: 73.2842 205.4444 |
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| airs | ||
| AQUA AIRS RADIANCES CHANNEL 28 : out of range
2 times in the last 10 days for at least one item Considerable: avg_biascorr=-0.2194, expected range: -0.1834 -0.1129 |
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| AQUA AIRS RADIANCES CHANNEL 52 : out of range
2 times in the last 10 days for at least one item Considerable: avg_biascorr=-0.2369, expected range: -0.2073 -0.1484 |
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| atms | ||
| NPP ATMS RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.4211, expected range: -0.3784 -0.3434 |
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| gpsro | ||
| COSMIC2-E5 GPSRO SETTING (24 impact heights affected) : out of range
Slight: obs_number=678.0000, expected range: 1336.8711 3089.5995 |
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| Atmospheric Motion Vector | ||
| All AQUA MODIS CLEAR WV ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 162.51 932.27 |
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