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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-15 06:00
| amsua | ||
| NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
6 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=0.8240, expected range: 0.5364 0.6412 Slight: stdev_norm_fgdepar=0.7163, expected range: 0.5576 0.6774 |
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| METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
13 times in the last 10 days for at least one item Severely_persistent: stdev_norm_fgdepar=0.7747, expected range: 0.5081 0.6083 Severely_persistent: avg_biascorr=-0.3244, expected range: -0.2883 -0.2665 Severe: stdev_norm_fgdepar=0.7154, expected range: 0.4969 0.5773 Considerable: stdev_norm_fgdepar=0.6746, expected range: 0.5273 0.6251 |
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| NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
Severe: stdev_norm_fgdepar=0.7507, expected range: 0.5631 0.6555 |
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| METOP-B AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
Severe: stdev_norm_fgdepar=0.8184, expected range: 0.6423 0.7100 |
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| METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
Severe: stdev_norm_fgdepar=0.7186, expected range: 0.5344 0.6037 |
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| METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
Severe: stdev_norm_fgdepar=0.6742, expected range: 0.5286 0.6086 |
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| METOP-C AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
Severe: stdev_norm_fgdepar=0.7647, expected range: 0.5893 0.6736 Considerable: stdev_norm_fgdepar=0.7399, expected range: 0.6237 0.6967 |
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| METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
Severe: stdev_norm_fgdepar=0.7243, expected range: 0.5017 0.5698 Slight: stdev_norm_fgdepar=0.6811, expected range: 0.5191 0.6313 |
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| METOP-C AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
Severe: stdev_norm_fgdepar=0.7677, expected range: 0.6128 0.6919 |
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| NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 11 : out of range
Considerable: stdev_norm_fgdepar=0.8170, expected range: 0.6610 0.7569 |
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| NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
Considerable: stdev_norm_fgdepar=0.8150, expected range: 0.6679 0.7615 |
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| NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
Considerable: stdev_norm_fgdepar=0.7227, expected range: 0.5616 0.6612 |
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| NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 9 : out of range
Slight: stdev_norm_fgdepar=0.9173, expected range: 0.7743 0.8708 |
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| NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
Slight: stdev_norm_fgdepar=0.9120, expected range: 0.7846 0.8821 |
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| iasi | ||
| METOP-B IASI RADIANCES (20 channels affected) : out of range
Severe: stdev_fgdepar=0.4555, expected range: 0.3527 0.3882 |
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| METOP-C IASI RADIANCES CHANNEL 119 : out of range
Severe: stdev_fgdepar=0.3161, expected range: 0.2556 0.2848 |
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| METOP-C IASI RADIANCES CHANNEL 125 : out of range
Severe: stdev_fgdepar=0.3155, expected range: 0.2529 0.2838 |
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| METOP-C IASI RADIANCES CHANNEL 131 : out of range
Severe: stdev_fgdepar=0.3069, expected range: 0.2455 0.2793 |
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| METOP-C IASI RADIANCES CHANNEL 138 : out of range
Severe: stdev_fgdepar=0.3105, expected range: 0.2418 0.2730 |
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| METOP-C IASI RADIANCES CHANNEL 144 : out of range
Severe: stdev_fgdepar=0.3044, expected range: 0.2381 0.2731 |
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| METOP-C IASI RADIANCES CHANNEL 151 : out of range
Severe: stdev_fgdepar=0.2977, expected range: 0.2392 0.2692 |
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| METOP-C IASI RADIANCES CHANNEL 157 : out of range
Severe: stdev_fgdepar=0.3021, expected range: 0.2355 0.2720 |
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| METOP-C IASI RADIANCES CHANNEL 163 : out of range
Severe: stdev_fgdepar=0.2947, expected range: 0.2356 0.2664 |
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| METOP-C IASI RADIANCES (22 channels affected) : out of range
Severe: stdev_fgdepar=0.4719, expected range: 0.3305 0.3692 |
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| METOP-C IASI RADIANCES CHANNEL 106 : out of range
Considerable: stdev_fgdepar=0.3252, expected range: 0.2607 0.3015 |
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| METOP-C IASI RADIANCES CHANNEL 113 : out of range
Considerable: stdev_fgdepar=0.3174, expected range: 0.2572 0.2929 |
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| METOP-C IASI RADIANCES CHANNEL 170 : out of range
Considerable: stdev_fgdepar=0.2860, expected range: 0.2360 0.2658 |
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| METOP-C IASI RADIANCES CHANNEL 183 : out of range
Considerable: stdev_fgdepar=0.2813, expected range: 0.2357 0.2642 |
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| METOP-C IASI RADIANCES CHANNEL 189 : out of range
Considerable: stdev_fgdepar=0.2814, expected range: 0.2323 0.2636 |
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| METOP-C IASI RADIANCES CHANNEL 16 : out of range
Slight: stdev_fgdepar=0.4573, expected range: 0.3626 0.4387 |
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| METOP-C IASI RADIANCES CHANNEL 66 : out of range
Slight: stdev_fgdepar=0.3395, expected range: 0.2980 0.3266 |
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| METOP-C IASI RADIANCES CHANNEL 72 : out of range
Slight: stdev_fgdepar=0.3758, expected range: 0.2794 0.3509 |
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| METOP-C IASI RADIANCES CHANNEL 101 : out of range
Slight: stdev_fgdepar=0.3356, expected range: 0.2609 0.3183 |
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| METOP-C IASI RADIANCES CHANNEL 176 : out of range
Slight: stdev_fgdepar=0.3019, expected range: 0.2300 0.2825 |
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| METOP-C IASI RADIANCES CHANNEL 195 : out of range
Slight: stdev_fgdepar=0.2661, expected range: 0.2336 0.2621 |
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| METOP-C IASI RADIANCES CHANNEL 303 : out of range
Slight: stdev_fgdepar=0.3007, expected range: 0.2305 0.2902 |
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| mwhs2 | ||
| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
9 times in the last 10 days for at least one item Severely_persistent: avg_norm_fgdepar=0.7693, expected range: -0.2046 0.1819 |
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| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
16 times in the last 10 days for at least one item Severely_persistent: avg_norm_fgdepar=1.2950, expected range: -0.3607 0.3455 |
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| FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
11 times in the last 10 days for at least one item Severely_persistent: avg_norm_fgdepar=1.3634, expected range: -0.2628 0.2618 |
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| Atmospheric Motion Vector | ||
| METEOSAT-8 AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
Slight: avg_fgdepar=4.0877, expected range: 3.4672 3.8440 |
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