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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-10-06 06:00
| amsua | ||
| METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
2 times in the last 10 days for at least one item Severe: avg_biascorr=-0.4444, expected range: -0.3919 -0.3522 |
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| METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
2 times in the last 10 days for at least one item Severe: avg_biascorr=-0.2460, expected range: -0.2090 -0.1651 |
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| NOAA-15 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
1 times in the last 10 days for at least one item Considerable: avg_biascorr=-0.0812, expected range: -0.0680 -0.0462 |
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| iasi | ||
| METOP-B IASI RADIANCES CHANNEL 38 : out of range
7 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2671, expected range: 0.2269 0.2327 |
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| METOP-B IASI RADIANCES CHANNEL 109 : out of range
12 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2554, expected range: 0.2004 0.2318 |
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| METOP-B IASI RADIANCES CHANNEL 116 : out of range
8 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.3060, expected range: 0.2562 0.2719 |
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| METOP-B IASI RADIANCES CHANNEL 148 : out of range
11 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2685, expected range: 0.2240 0.2382 |
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| METOP-B IASI RADIANCES CHANNEL 154 : out of range
11 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.2344, expected range: 0.1951 0.2047 |
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| METOP-B IASI RADIANCES CHANNEL 16 : out of range
18 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.4217, expected range: 0.3579 0.3917 |
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| METOP-B IASI RADIANCES CHANNEL 89 : out of range
15 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.3052, expected range: 0.2703 0.2843 |
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| METOP-B IASI RADIANCES CHANNEL 101 : out of range
12 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2937, expected range: 0.2621 0.2717 |
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| METOP-B IASI RADIANCES CHANNEL 106 : out of range
10 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2927, expected range: 0.2527 0.2697 |
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| METOP-B IASI RADIANCES CHANNEL 125 : out of range
7 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2892, expected range: 0.2438 0.2689 |
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| METOP-B IASI RADIANCES CHANNEL 131 : out of range
23 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2758, expected range: 0.2308 0.2533 |
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| METOP-B IASI RADIANCES CHANNEL 151 : out of range
23 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2640, expected range: 0.2210 0.2435 |
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| METOP-B IASI RADIANCES CHANNEL 189 : out of range
20 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2526, expected range: 0.2164 0.2318 |
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| METOP-B IASI RADIANCES CHANNEL 303 : out of range
16 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2504, expected range: 0.2161 0.2325 |
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| METOP-B IASI RADIANCES CHANNEL 386 : out of range
39 times in the last 10 days for at least one item Severely_persistent: avg_fgdepar=0.0100, expected range: 0.0774 0.1184 |
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| METOP-B IASI RADIANCES CHANNEL 157 : out of range
6 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2461, expected range: 0.2775 0.2938 |
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| METOP-C IASI RADIANCES (25 channels affected) : out of range
6 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=0.1858, expected range: 0.2375 0.2393 |
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| METOP-C IASI RADIANCES CHANNEL 16 : out of range
10 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.4156, expected range: 0.3490 0.3816 |
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| METOP-C IASI RADIANCES CHANNEL 386 : out of range
39 times in the last 10 days for at least one item Severely_persistent: avg_fgdepar=-0.0190, expected range: 0.0862 0.1007 |
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| METOP-C IASI RADIANCES CHANNEL 83 : out of range
11 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.3086, expected range: 0.3378 0.3564 |
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| METOP-C IASI RADIANCES CHANNEL 113 : out of range
5 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=0.2720, expected range: 0.2975 0.3161 |
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| mwhs2 | ||
| All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 31171.58 |
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| Atmospheric Motion Vector | ||
| NOAA-18 AVHRR IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Considerable: obs_number=239.0000, expected range: 5.3223 118.9634 |
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| METOP-C AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Slight: avg_fgdepar=3.6234, expected range: 3.0039 3.4139 |
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| resat | ||
| NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
29 times in the last 10 days for at least one item Severely_persistent: stdev_fgdepar=2.6465, expected range: 1.2930 1.9796 |
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| METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
28 times in the last 10 days for at least one item Severely_persistent: avg_biascorr=-0.6914, expected range: -0.7916 -0.7564 |
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